US008654995B2
(12) United States Patent
Silber et a].
(54)
US 8,654,995 B2
(10) Patent N0.:
(45) Date of Patent:
AUDIO CONTROL SYSTEM FORA VEHICLE
6,920,086 B1
7,039,205 B1 *
7,457,423 B2*
(75) Inventors: Michael W. Silber, Dix Hills, NY (U S);
7,765,046 B2 *
Feb. 18, 2014
7/2005 Sommer et al.
5/2006
Carter et al. ................ .. 381/123
ll/2008 LaZZeroniet al. .
7/2010
381/86
Takimoto et al. ............. .. 701/36
Aaron L. Butters, Thousand Oaks, CA
2003/0133582 A1
7/2003 Niederdrank
(Us)
2007/0078543 Al*
4/2007
Wake?eld ..................... .. 700/94
2008/0219480 Al*
9/2008
Hopkins ..................... .. 381/123
(73) Assignee: Harman International Industries,
Incorporated, Stamford, CT (U S)
(*)
Notice:
FOREIGN PATENT DOCUMENTS
DE
DE
EP
Subject to any disclaimer, the term of this
patent is extended or adjusted under 35
U.S.C. 154(1)) by 1165 days.
100 65 772 Al
100 65 826 Al
1 460 769 Al
7/2002
7/2002
9/2004
OTHER PUBLICATIONS
(21) Appl. N0.: 11/788,234
(22) Filed:
Published advertisement entitled “Blaupunkt Debuts Plug and Play
Car Audio Ampli?er Technology at 2007 CES,” dated Jan. 8, 2007.
Product advertisement entitled, “JL Audio Integrate, CleanSWeep
OEM Interface Products,” dated prior to Apr. 19, 2007.
European Search Report issued in related European Patent Applica
Apr. 19, 2007
(65)
Prior Publication Data
US 2008/0226101 A1
Sep. 18, 2008
tion No. 080047822.
Related US. Application Data
(60)
* cited by examiner
Provisional application No. 60/ 918,508, ?led on Mar.
Primary Examiner * Duc Nguyen
Assistant Examiner * George Monikang
(74) Attorney, Agent, or Firm * Brooks Kushman RC.
16, 2007.
(51)
(52)
(58)
Int. Cl.
H04H 60/04
H04R 27/00
H04N 11/00
H04R 29/00
US. Cl.
(2008.01)
(2006.01)
(2006.01)
(2006.01)
(57)
ABSTRACT
An audio control system may receive a plurality of audio
input signals. A sWitch or multiplexer may sWitch one of the
plurality of audio input signals from respective audio sources
USPC ............... .. 381/123; 381/81; 381/85; 381/86;
to a poWer ampli?er. A controller in communication With the
381/77; 381/56; 381/58
multiplexer may control switching of the multiplexer. A dis
play may provide the user With information regarding the
switching of the audio signal inputs. A user interface may
Field of Classi?cation Search
USPC ...... .. 381/86, 123, 120, 56, 58, 77, 80, 81, 85
See application ?le for complete search history.
(56)
permit the user to manually sWitch the audio source. A signal
detector in communication With an audio input signal may
detect a signal from a priority source. When the signal from
the priority source is detected, the controller may direct the
multiplexer to route the signal from the priority source to the
References Cited
U.S. PATENT DOCUMENTS
4,390,746 A *
5,243,640 A *
6,778,073 B2 *
poWer ampli?er.
6/1983 Higashiyama et al. ......... .. 381/7
9/1993 Hadley et al. ............ .. 455/4261
8/2004 Lutter et al. ................ .. 340/435
Source Devices l3_6
16 Claims, 10 Drawing Sheets
Vehicle Environment m
Audio Control System m
Display Module m
w
Display Q
a an
l30
132
319
NAV m
Multiple 10
Input Module m
Power
Amps
210
T ' I‘
m
Volume @
Processor
CD Liz
Radio H5
Satellite Radio ‘$5, I
Control 152
Processor
1
DVD @
|
240,242
M
Multiple m
Speakers
US. Patent
Feb. 18, 2014
Sheet 2 0f 10
US 8,654,995 B2
o3c8n0mDo?k
oEwEm
>62<0za
BIxmcENbs?
gm
Nw
05:32“;
3.
mm
SO
8
02 m%
US. Patent
Feb. 18, 2014
Sheet 4 0f 10
EmwoBlnsmv
HE3oOxmEo m
US 8,654,995 B2
EHaoxwiumw
N:
m:
mlm
A@%8k35
VGahiuwm A
hS6uE0tsm:
www>w!+
3Iv2:92560
Em
00 0
3820i
w;
9%
2:2
A /A
/A \\ A
A\
wPEwE
US. Patent
Feb. 18, 2014
Sheet 5 0f 10
US 8,654,995 B2
£ew2at2ml U
@3Bjon20sm3ai 8B3wE5B%E
0Slm2E3m5
5a35
Eswim
A
N:
howans
WKvQ
US. Patent
2a391:3m2
Feb. 18, 2014
Sheet 6 0f 10
EwK NSK
US 8,654,995 B2
omoK
yum/v
QEwE0
\/\v\ Ww v\
omv
\@
Q
M©
iiTo?
,Kw
@
M ,
@WKvmv
US. Patent
Feb. 18, 2014
Sheet 8 0f 10
US 8,654,995 B2
omw
9%
3%
wmw
1z§A5wl8?0am
6
Q3&5 6
k
mho uwo?
@EwEw
mg
52%&526
omwvmw/
omw
2
US. Patent
Feb. 18, 2014
Sheet 9 0f 10
US 8,654,995 B2
om
08
EswE@
82605 @86
a
it\
".\U
\|V
xo3w2m
%5:2
o;
US 8,654,995 B2
1
2
FIG. 1 shoWs a block diagram of the audio control system.
FIG. 2 shoWs an input/multiplexer portion of the audio
AUDIO CONTROL SYSTEM FORA VEHICLE
PRIORITY CLAIM
control system.
This application claims the bene?t of priority from US.
Provisional Application No. 60/918,508, ?led Mar. 16, 2007,
control system.
FIG. 3 shoWs a logic and control portion of the audio
FIG. 4 shoWs an output circuit of the audio control system.
FIG. 5 shoWs a three-Way ampli?er con?guration.
FIG. 6 shoWs a ?ve-Way ampli?er con?guration.
FIG. 7 shoWs a bi-ampli?ed ampli?er con?guration.
Which is incorporated by reference.
BACKGROUND OF THE INVENTION
FIG. 8 shoWs a display module of the audio control system.
FIG. 9 shoWs additional features of the audio control sys
1. Technical Field
This disclosure relates to an audio control system. In par
ticular, this disclosure relates to an audio control system for a
vehicle.
2. Related Art
Users may Wish to upgrade factory-installed audio sys
tems. Users may replace or upgrade the ampli?ers associated
With the factory-installed radios and CD players rather than
replacing an original radio or CD player. Users sometimes
tem.
FIG. 10 is a How diagram shoWing operation of the audio
control system.
DETAILED DESCRIPTION OF THE PREFERRED
EMBODIMENTS
existing factory-installed equipment. Dashboard modi?ca
FIG. 1 is a block diagram of an audio control system 110.
The audio control system 110 may be installed in a vehicle
environment 112. The audio control system 110 may include
a display module 122 and an input module 124. The display
module 122 may include an LCD display 128, a volume
control 130 and an input control 132. The display module 122
may be mounted or integrated Within a dashboard or cluster of
the vehicle 112 and may provide a user interface 134. The
tion and/ or cosmetic changes may be required to accommo
date neW devices. Replacement devices may not ?t in an
display module 122 may be used in addition to original equip
ment manufacturer (OEM) devices, and may provide all of
20
attach additional devices or “sources” to the vehicle’s audio
system. Such sources may include navigation systems, cellu
lar or Wireless telephones, AM-FM radios, satellite radios,
MP3 -based players, DVD players and other devices.
It may be expensive and dif?cult to remove and replace
existing dashboard resulting in less than a perfect appearance.
Decorative face plates con?gured to hide poor ?tting devices
25
the user controls and visual output to the user. Accordingly,
30
may not be necessary.
may not provide a professional or factory-installed look.
The LCD display 128 may include backlighting and dim
ming capability. HoWever, any suitable display device may be
Therefore, a need exists for an audio control system that can
manage and control multiple audio sources Without impact
ing the appearance of the vehicle’s dashboard.
used, such as a ?at panel display or an electro-luminescent
35
display. The display module 122 may have a body formed of
molded plastic to present an aesthetically pleasing appear
ance. The volume control 130 may provide user-adjustable
volume settings and poWer on/off functions. The input control
40
input sWitching functions for each of a plurality of audio
SUMMARY
An audio control system may receive a plurality of audio
input signals. A sWitch or multiplexer may sWitch one of the
plurality of audio input signals from respective audio sources
132 may provide system set-up functions, input labeling and
signal sources 136 through a command line interface, menu
to a poWer ampli?er. A controller in communication With the
multiplexer may control sWitching of the multiplexer. A dis
play may provide the user With information regarding the
sWitching of the audio signal inputs. A user interface may
permit the user to manually sWitch the audio source. A signal
detector in communication With an audio input signal may
detect a signal from a priority source. When the signal from
the priority source is detected, the controller may direct the
multiplexer to route the signal from the priority source to the
removal and/or modi?cation of the existing OEM devices
driven interface, and/or graphical user interface.
The display module 122 may communicate With the input
module 124. The input module 124 may be mounted in an
45
enclosed area of the vehicle 112, such as in the trunk, kick
panel, behind the dashboard, beloW a seat, etc. The input
module 124 may receive analog audio signals from the vari
ous source devices 136. Such source devices 136 may include
a navigation system 140, a cellular or Wireless telephone 142,
50
an AM-FM radio 144, a satellite radio 146, an MP3-based
poWer ampli?er.
Other systems, methods, features and advantages Will be,
player 148, DVD player 150 and CD player 152. Other source
or Will become, apparent to one With skill in the art upon
The input module 124 may control sWitching of the various
source devices 136 through commands from the display mod
ule 122. A Wiring harness 154, Which may be a unitary multi
Wire cable, having connector hardWare, may interface the
display module 122 With the input module 124. Because a
Wiring harness 154 may be used, the display module 122 may
devices may also be selected by the user.
examination of the folloWing ?gures and detailed description.
It is intended that all such additional systems, methods, fea
tures and advantages be included Within this description, be
Within the scope of the invention, and be protected by the
55
folloWing claims.
be mounted near or on the dashboard of the vehicle 112
BRIEF DESCRIPTION OF THE DRAWINGS
60
The system may be better understood With reference to the
folloWing draWings and description. The components in the
?gures are not necessarily to scale, emphasis instead being
placed upon illustrating the principles of the invention. More
Without diminishing its appearance. The display module 122
may control setting the input voltage levels and gain param
eters for the audio control system 110 during installation, or
through a user-selectable calibration process. The process
may ensure compatibility betWeen the various source devices
65
136 and the input module 124. The input module 124 may
over, in the ?gures, like-referenced numerals designate cor
further include a volume processor 160 and a control proces
responding parts throughout the different vieWs.
sor 162. The input module 124 may provide audio output
US 8,654,995 B2
3
4
signals 166 to multiple power ampli?ers 170 through an
output connector block 172. The poWer ampli?ers 170 may
drive a plurality of vehicle loudspeakers 176.
The display module 122 may communicate With the input
circuit 236 corresponding to the navigation input 212 to deter
mine if a navigation device signal is present. The navigation
signal detection circuit 260 may issue a navigation detection
module 124. The input module 124 may be mounted in an
enclosed area of the vehicle 112, such as in the trunk, kick
5
panel, behind the dashboard, beloW a seat, etc. The input
module 124 may receive analog audio signals from the vari
voice-command or other telemetric-based device linked to
the display module 122.
If a signal on the navigation input 212 caused de-selection
of another audio signal, the navigation detection circuit 260
may also detect When the navigation signal has terminated,
and may restore the deselected audio signal. The navigation
detection circuit 260 may delay restoration of the interrupted
ous source devices 136. Such source devices 136 may include
a navigation system 140, a cellular or Wireless telephone 142,
an AM-FM radio 144, a satellite radio 146, an MP3-based
player 148, DVD player 150 and CD player 152. Other source
devices may also be selected by the user.
A buffer ampli?er 228 or pre-ampli?er may receive the
signal so as to make a smooth transition during sWitching.
Such a delay may be, for example, about one to about tWo
seconds.
input from each of the inputs, respectively. Each buffer ampli
?er 228 may be an operational ampli?er. A gain adjustment
The Wireless telephone input 214 may be assigned to a
second highest priority. Accordingly, receipt of a cellular or
Wireless telephone audio signal on the telephone input 214
circuit 236 may receive output from some or all of the respec
tive buffer ampli?ers 228, and is thus shoWn in dashed lines.
Note that each of the radio inputs 216 and 218 may be differ
ential inputs. Accordingly, the corresponding buffer ampli?er
20
230 for the radio inputs 216 and 218 may be arranged With a
differential input. The differential inputs may reduce noise
and increase signal quality. Some or all of the inputs and
corresponding buffer ampli?ers 228 and 23 0 may be arranged
in a differential con?guration.
The volume processor 160 may be programmed to control
the respective gain adjustment circuits 236 to establish an
appropriate input level for each corresponding audio source
device 136. For example, the gain adjustment circuit 236 for
the navigation input may be programmed to receive a signal in
the range of about 100 millivolts to about 16 volts. The gain
may deselect all other sources in use, except for the naviga
tion source 140. In this Way, the radio 144, the CD player 152
or other audio source devices 136 may be deselected When the
user receives a telephone call.
A telephone detection circuit 266 may receive a telephone
25
30
corresponding to each input may be individually pro
grammed depending on the expected output levels of the
output signal 264 from the respective buffer ampli?er 228 (or
gain adjustment circuit 236) corresponding to the telephone
input 214, and determine if a Wireless telephone signal is
present. The telephone detection circuit 266 may issue a
telephone detection signal 268 to inform the control proces
sor 162 that the telephone signal is present on the telephone
input 214. The user may also select the telephone source 142
manually or automatically through voice-command or
various audio source devices 136.
A right channel multiplexer 240 and a left channel multi
signal 262 to inform the control processor 162 if a navigation
signal is present on the navigation input 212. The user may
also select the navigation source 140 manually or through
35
through a telemetric-based device linked to the display mod
ule 122.
A short-range Wireless decoder 270, such as a Bluetooth®
plexer 242 may receive the output from each gain adjustment
decoder, may couple the telephone input 214 to the multiplex
circuit 236 respectively, or from the corresponding buffer
ampli?er 228 and 230 if no gain adjustment circuit is present.
The right and left channel multiplexers 240 and 242 may be
linear or analog multiplexers. The output of certain buffer
ampli?ers 228 or gain adjustment circuits 236 may be routed
ers 240 and 242 to link the telephone 142. The decoder 270
may include an antenna 272 and Wireless transceiver circuit
274 con?gured to receive short-range radio signals. Various
40
tooth® enabled cellular telephone. Other short-range cable
through additional pre-conditioning circuitry prior to routing
to the multiplexers 240 and 242. The volume processor 160
may receive a right channel audio output signal 250 from the
right channel multiplexer 240, and may receive a left channel
45
audio output signal 252 from the left channel multiplexer 242.
The volume processor 160 may control sWitching of the mul
tiplexers 240 and 242 through a multiplexer control signal
244.
Some of the inputs corresponding to the respective audio
50
source devices 136 may be prioritized. For example, the navi
gation input 212 and the telephone input 214 may have a
higher priority than the other inputs. If the audio control
system 110 detects an audio signal originating from the navi
gation input 212, the navigation input may receive priority
Wireless telephone devices may be used, such as a Blue
55
over all of the other inputs. Accordingly, if the radio 144 or
CD player 152 is operating, and a signal from the navigation
system 140 becomes active, the audio control system 110 may
control the right and left channel multiplexers 240 and 242 to
free decoders may be in communication With certain unallo
cated input sources to accommodate high-?delity audio
signals. Some of the decoders may be Bluetooth® decoders,
such as an A2DP (advanced audio distribution protocol)
decoder.
A telephone detection circuit 266 may receive a telephone
output signal. 264 from the respective buffer ampli?er 228 (or
gain adjustment circuit 236) corresponding to the telephone
input 214, and determine if a Wireless telephone signal is
present. The telephone detection circuit 266 may issue a
telephone detection signal 268 to inform the control proces
sor 162 that the telephone signal is present on the telephone
input 214. The user may also select the telephone source 142
manually or automatically through voice-command or
through a telemetric-based device linked to the display mod
ule 122.
Alternatively, priority levels betWeen some of the inputs
may be reassigned under softWare control. The user may
immediately sWitch the navigation system input 212 through
reprogram the priority levels by selecting the appropriate
the multiplexers and to the volume processor. The navigation
input 212 may be assigned a highest priority so that the user
Will not fail to hear an audio navigation prompt. Thus, the
navigation input 212 may “interrupt” or deselect all other
inputs, regardless of Which input is in use at the time.
A navigation signal detection circuit 260 may receive an
output 254 from the ampli?er 228 or the gain adjustment
function using the volume control 130 or input control 132.
Additional signal detection circuits similar to the navigation
detection circuit 260 may be provided. Signals provided to
65
and from the additional signal detection circuits may be re
routed using transmission gates or mechanical relays, such as
a reed relay, When the priority levels are modi?ed under
softWare control so as to maintain a correspondence With the
US 8,654,995 B2
6
5
priority input to Which it is associated. Accordingly, the user
A sub-Woofer summing circuit 426 may combine or sum
may have complete control over Which input source device
136 is selected via the input control 132 located on the display
module 122. Thus, the user may chose betWeen the various
input sources.
the right channel audio output signal 316 and the left channel
audio output signal 318 from the volume processor 160 to
generate a monaural subWoofer audio signal 428. The sub
Woofer summing circuit 426 may be an operational ampli?er
arranged in a summing con?guration.
A signal summing circuit 280 may combine the telephone
audio output signal 264 and the navigation audio output sig
nal 254 to provide a summed signal. The signal summing
FIG. 4 shoWs additional details of an output circuit 410,
Which may include the output buffer ampli?ers 314 and the
output connector blocks 172. The output connector blocks
172 may include dual output jack con?gurations in the form
of RCA-type connectors 420 and RJ45-type connectors 422.
circuit 280 may be an operational ampli?er arranged in a
summing con?guration. This may permit the user to hear both
audio signals so that the user does not miss the navigation
Multiple output jacks 420 and 422 may provide universal
information or a telephone call.
FIG. 3 shoWs a logic and control portion 310 of the input
module 124. The volume processor 160 may receive the right
channel audio signal 250 and the left channel audio signal 252
from the respective multiplexers 240 and 242. The volume
processor 160 may process the left and right channel audio
signals 250 and 252 and route conditioned output signals 312
to a plurality of output buffer ampli?ers 314. The conditioned
output signals 312 may include a right channel output signal
316 and a left channel output signal 318. The output buffer
ampli?ers 314 may be operational ampli?ers arranged in a
unity gain con?guration, or may provide a predetermined
amount of gain. The output buffer ampli?ers 314 may be
con?gured to isolate and prevent damage to the circuitry
should the output signals 166 to the poWer ampli?ers 370
become short-circuited.
A connector arrangement or jack 319 may couple the con
trol processor 162 to the display module 122 using a minimal
number of Wires. A standard DIN type connector may be
used. A serial communication format may be used to mini
miZe the number of Wires.
FIG. 3 shoWs a logic and control portion 310 of the input
module 124. The volume processor 160 may receive the right
channel audio signal 250 and the left channel audio signal 252
from the respective multiplexers 240 and 242. The volume
processor 160 may process the left and right channel audio
signals 250 and 252 and route conditioned output signals 312
to a plurality of output buffer ampli?ers 314. The conditioned
output signals 312 may include a right channel output signal
316 and a left channel output signal 318. The output buffer
ampli?ers 314 may be operational ampli?ers arranged in a
unity gain’ con?guration, or may provide a predetermined
amount of gain. The output buffer ampli?ers 314 may be
con?gured to isolate and prevent damage to the circuitry
should the output signals 166 to the poWer ampli?ers 370
become short-circuited.
The control processor 162 may communicate With the vol
ume processor 160 and may also receive the navigation detec
connectivity. Any number of connectors may be used in alter
native systems. The output jacks 420 and 422 may route the
audio output signals 166 to the multiple poWer ampli?ers 170.
The multiple poWer ampli?ers 170 may be located remote
from the controller (e.g., in the trunk of the vehicle).
20
Woofer summing circuit 426 may be an operational ampli?er
arranged in a summing con?guration.
The multiple RCA-type connectors 420 may include front
25
speaker connectors 430, rear speaker connectors 432 and a
subWoofer connector 434. Corresponding signals are pro
vided to the RJ45-type connectors 422, Which may include
front speaker connectors 436, rear speaker connectors 438
and a subWoofer connector 440. The RCA-type connectors
30
420 and the RJ45-type connectors 422 may be functionally
equivalent.
FIG. 7 shoWs an alternative bi-ampli?ed ?ve-channel con
35
con?guration may include a ?rst stereo poWer ampli?er 720
cuitry is provided in the loud speakers, a high-pass ?lter or
crossover circuit 722 may connect the front input connectors
40
crossover circuit 724 may connect the rear input connectors
432 to a second stereo poWer ampli?er 728 to provide the
midrange audio signals. Finally, a loW-pass ?lter or crossover
45
circuit 732 may connect the rear input connectors 434 to a
third poWer ampli?er 734 to provide the subWoofer audio
signals. The ampli?ers may be con?gured to provide
LOGIC7 Surround Sound (trademark of Lexicon Corp., a
50
input 212 and the telephone input 214 to interrupt other
55
output buffer ampli?ers 314.
division of Harman Specialty Group of Massachusetts). The
poWer ampli?ers may be Class-D poWer ampli?ers.
FIG. 6 shoWs a ?ve-channel ampli?er con?guration. Only
the ?ve RCA-type connectors 420 are shoWn to avoid dupli
cation. A ?ve channel con?guration may include a ?rst poWer,
ampli?er 610 that may drive a front left-side speaker 612, a
second poWer ampli?er 614 that may drive a front right-side
speaker 616, and a third poWer ampli?er 618, that may drive
a subWoofer speaker 620. Additionally, a fourth poWer ampli
FIG. 4 shoWs additional details of an output circuit 410,
Which may include the output buffer ampli?ers 314 and the
output connector blocks 172. The output connector blocks
?er 630 may drive a rear left-side speaker 632, and a ?fth
60
Multiple output jacks 420 and 422 may provide universal
connectivity. Any number of connectors may be used in alter
native systems. The output jacks 420 and 422 may route the
audio output signals 166 to the multiple poWer ampli?ers 170.
The multiple poWer ampli?ers 170 may be located remote
from the controller (e. g., in the trunk of the vehicle).
430 to the ?rst stereo poWer ampli?er 720 to provide the
high-frequency audio signals. Similarly, a band-pass ?lter or
control processor 162 may effect control of the navigation
172 may include dual output jack con?gurations in the form
of RCA-type connectors 420 and RJ45-type connectors 422.
?guration. The front speakers may be bi-ampli?ed such that
there may be separate ampli?ers for tWeeters 710, mid-range
speakers 712 and a subWoofer speaker 714. The bi-ampli?ed
that may drive the tWeeters 710. Because no crossover cir
tion signal 262 and the telephone detection signal 268. The
source devices 136 in a priority-mode state. The control pro
cessor 162 may also provide a mute control signal 340 to the
A sub-Woofer summing circuit 426 may combine or sum
the right channel audio output signal . 316 and the left channel
audio output signal 318 from the volume processor 160 to
generate a monaural subWoofer audio signal 428. The sub
poWer ampli?er 634 may drive a rear right-side speaker 636.
A single harness, such as the DIN-type cable or connector
319, may connect the display module 122 and the input mod
ule 124. The display module 122 and the input module 124
may communicate using various command and control sig
nals 830 transmitted through the connector 319. The display
65
module 122 may include a separate microprocessor 832 and a
backlighting circuit 834. The display module 122, including
the LCD display 128, may receive poWer from the poWer
US 8,654,995 B2
7
8
supply located in the input module. Alternatively, the display
tions for use by or in connection With an instruction execut
module 122 may connect to the input module 124 Wirelessly
so as to eliminate the DIN-type cable and connector 319. In
able system, apparatus, or device. The machine-readable
medium may selectively be, but is not limited to, an elec
such a con?guration, the input module 122 may receive
tronic, magnetic, optical, electromagnetic, or infrared signal
poWer from an internal battery, or vehicle poWer bus, or
or a semiconductor system, apparatus, device, or propagation
medium. A non-exhaustive list of examples of a machine
readable medium includes: a magnetic or optical disk, a vola
another source.
A ?rst rotary encoder 842 may receive input from the
volume control 130 of the display module 122. A second
rotary encoder 844 may receive input from the input control
132 of the display module 122. The encoded information may
be transmitted to the control processor 162 of the input mod
ule 124 via serial lines through the connector 319. The rotary
tile memory such as a Random Access Memory “RAM,” a
Read-Only Memory “ROM,” an Erasable Programmable
Read-Only Memory (i.e., EPROM) or Flash memory, or an
optical ?ber. A machine-readable medium may also include a
tangible medium upon Which executable instructions are
printed, as the logic may be electronically stored as an image
encoders 842 and 844 may additionally provide push and hold
noti?cation corresponding to depression and holding of the
corresponding controls 130 and 132.
or in another format (e.g., through an optical scan), then
compiled, and/or interpreted or otherWise processed. The
processed medium may then be stored in a computer and/or
FIG. 9 shoWs an alternate arrangement that may include an
eighth input 910 (“digital input”), Which may receive digital
audio signals from a digital device, such as from a DVD
player. Again, although a single line may be shoWn in FIG. 9,
the digital signal may be a stereo signal, including left and
right channel signals. The con?guration of FIG. 9 may
20
machine memory.
The systems may include additional or different logic and
may be implemented in many different Ways. A controller
may be implemented as a microprocessor, microcontroller,
application speci?c integrated circuit (ASIC), discrete logic,
include the components shoWn in FIGS. 2 and 3, Where and
or a combination of other types of circuits or logic. Similarly,
like-referenced numbers are used to denote the same or simi
memories may be DRAM, SRAM, Flash, or other types of
memory. Parameters (e.g., conditions and thresholds), and
other data structures may be separately stored and managed,
lar components. For clarity, other components of FIGS. 2 and
3 are not duplicated.
A ?rst rotary encoder 842 may receive input from the
volume control 130 of the display module 122. A second
rotary encoder 844 may receive input from the input control
132 of the display module 122. The encoded information may
be transmitted to the control processor 162 of the input mod
ule 124 via serial lines through the connector 319. The rotary
25
may be incorporated into a single memory or database, or
may be logically and physically organiZed in many different
Ways. Programs and instruction sets may be parts of a single
program, separate programs, or distributed across several
30
encoders 842 and 844 may additionally provide push and hold
noti?cation corresponding to depression and holding of the
corresponding controls 130 and 132.
FIG. 10 is a How diagram shoWing acts 1000 that may be
memories and processors. The systems may be included in a
Wide variety of electronic devices, including a cellular or
Wireless phone, a headset, a hands-free set, a speakerphone,
communication interface, or an infotainment system.
35
The audio control system 110 may manage and sWitch
multiple audio sources. The control system may receive audio
taken during operation of the audio control system 110. The
source input from existing OEM provided devices 136, such
user may depress or push in the volume control 130 to turn-on
as the radio and CD player. The control system 110 may also
receive audio source input from additional audio sources,
such as navigation systems 140, cellular or Wireless tele
(Act 1010) the audio control system 110. The user may
depress or push in the volume control 130 a second time (Act
1020) to access the tone, balance, and fader parameters. Tum
40
ing the volume control in a clockWise or counter-clockWise
DVD players 150 etc. The control system 110 may be an
aftermarket or “add-on” system. Accordingly, removal or
direction (Act 1030) may change the selected parameter. If
additional parameters require changing (Act 1040), the user
may push the volume control and modify the selected param
eter. After a predetermined period of time, for example about
three seconds (Act 1050), if the volume control 130 is not
replacement of the OEM provided devices may be obviated,
45
Which may preserve the cosmetic appearance of the dash
board. Certain audio input sources may be prioritiZed such
that audio signals from a high priority device, such as a
navigation system or Wireless telephone, may interrupt audio
signals from loWer priority devices.
depressed, the audio control system 110 may revert back to a
volume control mode (Act 1060).
The logic, circuitry, and processing described above may
be encoded in a computer-readable medium such as a
phones 142, satellite radios 146, MP3-based players 148,
50
While various embodiments of the invention have been
described, it Will be apparent to those of ordinary skill in the
CDROM, disk, ?ash memory, RAM or ROM, an electromag
art that many more embodiments and implementations are
netic signal, or other machine-readable medium as instruc
tions for execution by a processor or controller. Alternatively
possible Within the scope of the invention. Accordingly, the
invention is not to be restricted except in light of the attached
claims and their equivalents.
or additionally, the logic may be implemented as analog or
digital logic using hardWare, such as one or more integrated
55
circuits (including ampli?ers, adders, delays, and ?lters), or
1. An audio control system for managing a plurality of
audio source devices, the system comprising:
a plurality of audio input signals, at least one of the audio
input signals corresponding to a priority audio source
one or more processors executing ampli?cation, adding,
delaying, and ?ltering instructions; or in softWare in an appli
cation programming interface (API) or in a Dynamic Link
Library (DLL), functions available in a shared memory, or
60
audio input signals and is con?gured to adjust gain for
tion of hardWare and softWare.
The logic may be represented in (e.g., stored on or in) a
The media may comprise any device that contains, stores,
communicates, propagates, or transports executable instruc
device;
a gain adjustment circuit that receives at least one of the
de?ned as local or remote procedure calls; or as a combina
computer-readable medium, machine-readable medium,
propagated-signal medium, and/or signal-bearing medium.
We claim:
the at least one audio input signal received;
a sWitching circuit con?gured to select one of the plurality
65
of audio input signals and sWitch the selected signal
from the respective audio source devices through the
sWitching circuit, Wherein the sWitching circuit further
US 8,654,995 B2
10
comprises a right channel multiplexer and a left channel
multiplexer in communication With a volume processor,
the volume processor receives a right channel audio
output signal from the right channel multiplexer and a
left channel audio output signal from the left channel
7. The system according to claim 1 comprising a Wireless
decoder circuit con?gured to transmit audio signals to the
sWitching circuit.
5
multiplexer;
a controller in communication With the switching circuit to
device;
control sWitching of the sWitching circuit and in com
munication With the gain adjustment circuit to selec
a gain adjustment means that receives at least one of the
audio input signals and is con?gured to adjust gain for
tively establish an input level for at least one of the audio
the at least one audio input signal received;
sWitching means con?gured to select one of the plurality of
input signals;
a signal detector in communication With at least one of the
audio input signals and sWitch the selected signal from
audio input signals and con?gured to detect presence of
a signal from the priority audio source device;
the controller directing the sWitching circuit to deselect an
existing input and select an audio input signal corre
sponding to the priority audio source device When the
signal from the priority audio source device is detected;
and
a display module having an associated input control, the
controller in communication With the display module
the respective audio source devices through the sWitch
ing means, Wherein the sWitching means further com
prises a right channel multiplexer and a left channel
multiplexer in communication With a volume processor,
the volume processor receives a right channel audio
20
multiplexer;
to control, sWitching of the sWitching means and in
communication With the gain adjustment means to
25
Wherein the plurality of audio input signals include a tele
phone audio signal transmitted from a cellular telephone
signal detection means in communication With at least one
of the audio input signals and con?gured to detect pres
and a navigation audio signal transmitted from a navi
30
circuit for summing the telephone audio signal and the
navigation audio signal to generate a summed signal that
detected; and
permits a user to receive ?rst data on the telephone audio
35
and
Wherein the controller is con?gured to interrupt at least one
?rst audio source device that transmits a ?rst audio input
signal and to prevent transmission of the ?rst audio input
signal if the ?rst audio input signal does not correspond
a display module having an associated input control, the
control means in communication, With the display mod
ule and input control to provide reprogramming of pri
ority levels associated With the audio input signals via
user selection of the input control associated With the
40
display module,
Wherein the plurality of audio input signals include a tele
phone audio signal transmitted from a cellular telephone
to one of the telephone audio signal and the navigation
audio signal for enabling the user to receive the ?rst data
on the telephone audio signal and the second data on the
navigation audio signal Without interruption from the
?rst audio input signal.
ence of a signal from the priority audio source device;
the control means directing the sWitching means to dese
lect an existing input and select an audio input signal
corresponding to the priority audio source device When
the signal from the priority audio source device is
Wherein the sWitching circuit further includes a summing
signal and second data on the navigation audio signal,
selectively establish an input level for at least one of the
audio input signals;
module,
gation system;
output signal from the right channel multiplexer and a
left channel audio output signal from the left channel
control means in communication With the sWitching means
and input control to provide reprogramming of priority
levels associated With the audio input signals via user
selection of the input control associated With the display
8. An audio control system for managing a plurality of
audio source devices, the system comprising:
a plurality of audio input signals, at least one of the audio
input signals corresponding to a priority audio source
and a navigation audio signal transmitted from a navi
gation system;
45
Wherein the sWitching circuit further includes a summing
2. The system according to claim 1 comprising a second
signal detector con?gured to detect presence of a signal from
circuit for summing the telephone audio signal and the
navigation audio signal to generate a summed signal that
a second priority audio source device, Where the controller
directs the sWitching circuit to deselect an existing audio
permits a user to receive ?rst data on the telephone audio
input and select an audio input signal corresponding to the
signal and second data on the navigation audio signal;
50
second priority audio source device, When a signal from the
second priority audio source device is detected.
3. The system according to claim 2, Where if a selected
audio input signal corresponds to the priority audio source
device, the controller does not deselect the selected input
55
When a signal from the second priority audio source device is
detected.
4. The system according to claim 2, Where the controller
changes a relative priority level of the priority audio source
device and the second priority audio source device.
5. The system according to claim 1 comprising a display in
permit manual selection and sWitching of the audio input
source through the sWitching circuit.
signal and to prevent transmission of the ?rst audio input
signal if the ?rst audio input signal does not correspond
to one of the telephone audio signal and the navigation
audio signal for enabling the user to receive the ?rst data
on the telephone audio signal and the second data on the
navigation audio signal Without interruption from the
?rst audio input signal.
60
communication With the controller, con?gured to provide
information regarding sWitching of the audio input signals.
6. The system according to claim 1 comprising a user
interface in communication With the controller con?gured to
and
Wherein the controller is con?gured to interrupt at least one
?rst audio source device that transmits a ?rst audio input
9. An audio control system for controlling a plurality of
audio sources, the system comprising:
a plurality of audio input signals, at least one of the audio
input signals corresponding to a priority audio source
device;
65
a gain adjustment circuit that receives at least one of the
audio input signals and is con?gured to adjust gain for
the at least one audio input signal received;
US 8,654,995 B2
11
12
device, the controller does not deselect the selected input
When a signal from the second priority audio source device is
detected.
12. The system according to claim 11, Where the controller
changes a relative priority level of the priority audio source
device and the second priority audio source device.
13. The system according to claim 9 comprising a Wireless
decoder circuit con?gured to transmit audio signals to the
a switching circuit con?gured to select one of the plurality
of audio input signals, and sWitch the selected signal
from the respective audio source device to an ampli?er,
Wherein the sWitching circuit further comprises a right
channel multiplexer and a left channel multiplexer in
communication With a volume processor, the volume
processor receives a right channel audio output signal
from the right channel multiplexer and a left channel
audio output signal from the left channel multiplexer;
sWitching circuit.
14. A method of managing a plurality of audio sources
comprising;
a controller in communication With the sWitching circuit to
receiving a plurality of audio input signals, at least one of
the audio input signals corresponding to a priority audio
control sWitching of the sWitching circuit and in com
munication With the gain adjustment circuit to selec
source device;
tively establish an input level for at least one of the audio
selectively adjusting gain of at least one of the audio input
input signals;
signals to establish an input level for the at least one
a display in communication With the controller and con
audio input signal;
?gured to provide information regarding sWitching of
the audio input signals;
selecting one of the plurality of audio input signals from
respective audio sources and sWitching the selected sig
a user interface con?gured to permit manual sWitching of
the audio input signals;
nal into communication With an ampli?er;
20
channel multiplexer to a volume processor and sending
a left channel audio output signal from a left channel
multiplexer to the volume processor;
a signal detector in communication With at least one of the
audio input signals con?gured to detect presence of a
signal from a priority audio source device;
the controller directing the sWitching circuit to deselect an
existing input and select an audio input signal corre
sponding to the priority audio source device When the
signal from the priority audio source device is detected;
and
a display module having an associated input control, the
controller in communication With the display module
25
35
audio signal and second data on the navigation audio
gation system;
Wherein the sWitching circuit further includes a summing
40
mits a ?rst audio input signal and preventing transmis
sion of the ?rst audio input signal if the ?rst audio input
signal does not correspond to one of the telephone audio
signal and second data on the navigation audio signal;
45
50
out interruption from the ?rst audio input signal.
15. The method according to claim 14 comprising:
detecting presence of a second priority audio input signal;
and
When the signal from the second priority audio source
device is detected then deselecting an existing audio
55
reselecting the second priority audio input signal; and
signal if the at least one audio device does not corre
from the ?rst audio input signal.
input signal;
sWitching the reselected signal into communication With
the ampli?er.
16. The method according to claim 15, Where if a the
input and select an audio input signal corresponding to the
audio input signal corresponds to the priority audio source
signal and the navigation audio signal for enabling the
user to receive the ?rst data on the telephone audio signal
and the second data on the navigation audio signal With
signal and to prevent transmission of the ?rst audio input
second priority audio source device When a signal from the
second priority audio source device is detected.
11. The system according to claim 10, Where if a selected
signal, the plurality of output signals include the tele
phone audio signal and the navigation audio signal; and
interrupting at least one ?rst audio source device that trans
permits a user to receive ?rst data on the telephone audio
10. The system according to claim 9 comprising a second
signal detector con?gured to detect presence of a signal from
a second priority audio source device, Where the controller
directs the sWitching circuit to deselect an existing audio
summing a telephone audio signal transmitted from a cel
lular telephone and a navigation audio signal transmitted
from a navigation system to generate a summed signal
that permits a user to receive ?rst data on the telephone
and a navigation audio signal transmitted from a navi
spond to one of the telephone audio signal and the navi
gation audio signal for enabling the user to receive the
?rst data on the telephone audio signal and the second
data on the navigation audio signal Without interruption
priority audio signal is detected;
reprogramming priority levels associated With the audio
input signals in response to user selection of displayed
functions via an input control;
module,
and
Wherein the controller is con?gured to interrupt at least one
?rst audio source device that transmits a ?rst audio input
input signal;
signal into communication With the ampli?er, When the
30
levels associated With the audio input signals via user
selection of the input control associated With the display
circuit for summing the telephone audio signal and the
navigation audio signal to generate a summed signal that
displaying information regarding sWitching of the audio
signal inputs; detecting presence of a priority audio
deselecting an existing audio input signal, reselecting the
priority audio input signal, and sWitching the reselected
and input control to provide reprogramming of priority
Wherein the plurality of audio input signals include a tele
phone audio signal transmitted from a cellular telephone
sending a right channel audio output signal from a right
priority audio input signal is selected, the priority audio input
60
signal is not deselected When the second priority audio signal
is detected.