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USOO5179543A
United States Patent [191
Nara et al.
[11]
[45]
[54] DUBBING APPARATUS FOR AUDIO
63-131390 3/1988 Japan.
Jan. 12, 1993
63-161581 5/1988 Japan.
EQUIPMENT
Primary Examiner-Stuart S. Levy
[75] Inventors: Hideki Nara; Kazuya Miyarnoto,
both of Tokyo, Japan
[73] Assignee: Pioneer Electronic Corporation,
Assistant Examiner—Joseph A. Rhoa
Attorney, Agent, or Firm-Sughrue, Mion, Zinn,
Macpeak & Seas
Tokyo, Japan
[21] Appl. No.: 691,299
[57]
ABSTRACT
A dubbing apparatus for reproducing plural pieces of
[22] Filed:
Apr. 25, 1991
[30]
Foreign Application Priority Data
Aug. 8, 1990 [JP]
5,179,543
Patent Number:
Date of Patent:
music recorded on an optical disc and a recording de
vice for recording the reproduced music signals sup
plied from the reproducing device onto a magnetic tape.
Japan ................................ .. 2-208022
When the total recorded time of music on the disc is
[51]
Int. Cl.5 ...................... .. G11B 27/02; GllB 7/28;
longer than the recordable time of the magnetic tape,
the recording device stops recording each time the
reproduction of each piece of music is ?nished, rewinds
the magnetic tape for a speci?ed period of time, and
then starts recording the next piece of music while per
GllB 27/024
[52]
U.S. Cl. ........................................ .. 369/3; 369/85;
[58]
Field of Search ..................... .. 369/84, 85, l, 2, 3,
[56]
369/14, 15; 360/15, 57, 13; 381/104
References Cited
360/15
forminglfade-in and fade-out actions on the two adja
cent pieces of music during this overlapped recording
period, thereby reducing the overall music recording
US, PATENT DOCUMENTS
4,903,148
2/1990 Amano et a1.
4,993,008
2/1991
time, This allows all pieces of music on the disc to be
dubbed
into the magnetic tape within the recordable
_
Shiba ..................................... ., 369/3
time of the latter.
FOREIGN PATENT DOCUMENTS
61-255575 11/1986 Japan ................................... .. 369/84
16
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DISPLAY
CONTROL
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OPERATION
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8 Claims, 3 Drawing Sheets
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RECORDING
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—-MAGNETICHEAD_
“W
CIRCUIT
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A
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C
PLAYBACK TIME OF
MUSIC A
TAPE DECK
a
US. Patent
Jan. 12, 1993
Sheet 2 of 3
5,179,543
US. Patent
Jan. 12, 1993
to
PLAYBACK TIME OF
MUSIC A
Sheet 3 of 3
tC
5,179,543
1
5,179,543
2
and a cross fade time, and to start recording, from the
rewound position, the music signal of the next piece of
DUBBING APPARATUS FOR AUDIO
music being reproduced by the reproducing device
EQUIPMENT
' while at the same time gradually lowering the recording
BACKGROUND OF THE INVENTION
5
1. Field of the Invention
The present invention relates to a dubbing apparatus
for audio equipment which reproduces music informa
tion from optical discs and digital audio tapes and re
cords it on magnetic tapes such as cassette tapes.
2. Prior Art
A dubbing apparatus is known, in which a plurality of
pieces of music recorded on a compact disc (or CD) are
reproduced one after another by a CD player and re
level of the previously recorded piece of music for the
duration of ‘the cross fade time, thus overlapping the
two adjacent pieces of music in the cross fade time.
With this invention, even when the total playback
time of plural pieces of music recorded on an optical
disc or digital audio tape is longer than the recordable
time of a magnetic tape, it is possible to record these
pieces of music within the recordable time of the mag
netic tape by cutting off the end portion of the previ
ously- recorded piece of music and by recording the next
15 piece of music so as to overlap the beginning portion of
corded on magnetic tapes such as cassette tapes.
the next piece over the last part of the previously re
The CD recorded time and the recordable time of
corded piece of music.
magnetic tape seldom coincide an this gives rise to the
following inconveniences. When the CD recorded time
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram of a dubbing apparatus for
audio equipment as one embodiment of the invention;
FIG. 2 is a ?owchart showing the sequence of opera
tion of the dubbing apparatus of FIG. 1; and
FIG. 3 is a schematic diagram showing the recorded
condition of music signals on a magnetic tape.
is longer than the recordable time of the magnetic tape,
the music being recorded into tape is interrupted
halfway. When the CD recorded time is shorter than
the recordable time of the magnetic tape, a relatively
long, unrecorded portion remains at the end of the tape.
To solve this problem some apparatuses have been
proposed. To cite one example, there is an audio equip
ment (Japanese Patent Preliminary Publication No.
Showa 63-131390) which compares the CD recorded
time and the recordable time of magnetic tape and dis»
plays the number of pieces of music that can be com
pletely recorded into the magnetic tape as well as the
recordable time. Another example is a compact disc
player with a record assist function (Japanese Patent
Preliminary Publication No. Showa 63-l6l58l), which
PREFERRED EMBODIMENT OF THE
INVENTION
FIG. 1 is a block diagram showing one embodiment
of a dubbing apparatus for audio equipment according
to this invention. This apparatus consists of a CD player
1 and a tape deck 2. The CD player 1 reads table-of-con
tents (TOC) information and music information re
displays information indicating whether the pieces of
corded on a CD 3 and converts the music information
into a music signal and record it on a magnetic tape 4
music selected by the user can be completely recorded
into the magnetic tape.
through the tape deck 2.
With the above conventional apparatuses, the user
can have the information about the number of pieces of
music that can be recorded into magnetic tape, the
The CD player 1 has a control unit 10 composed of a
microcomputer and, according to the control from the
control unit 10, reads the TOC information and music
recordable time, and whether the selected pieces of
information from the CD 3 through a pickup circuit 11.
music can completely be recorded into the magnetic
The information thus read out is ampli?ed by an ampli
tape. Despite this advantage, when the CD recorded
?er circuit‘ 12 and separated into TOC information and
time is found longer, even slightly, than the recordable
music
information by a signal processing circuit 13. The
time of the magnetic tape, the user has to replace the
tape with other magnetic tape with a longer recordable 45 TOC information is sent to the control unit 10 and the
music information to a digital-to-analog (D/A) con
time. In that case, however, a long unrecorded portion
verter 14. The D/A converter converts the music infor
may result at the end of the tape.
mation supplied from the signal processing circuit 13
SUMMARY OF THE INVENTION
The present invention has been accomplished to
overcome the above drawbacks and its objective is to
into an analog signal, which is then outputted as a music
signal to the tape deck 2. The control unit 10 checks the
TOC information separated by the signal processing
circuit 13 to detect the number of pieces of music, total
provide a dubbing apparatus for audio equipment
which, even when the total playback time of all pieces
vrecorded time, and the playback time of each piece of
of music recorded on the CD is longer than the record
able time of the magnetic tape, can record these music
music recorded on the CD 3, and at the same time
checks the condition of each operation switch on an
of the CD completely into the magnetic tape within the
recordable time.
To achieve the above objective, a dubbing apparatus
for audio equipment of this invention comprises: a re
operation unit 15. The detected TOC information and
producing device for reproducing a plurality of pieces
of music recorded on an optical disc or digital audio
tape and outputting the reproduced music as music
signals; and a recording device for dubbing the repro
duced music signals to a magnetic tape, said recording
device being adapted to stop recording each time the
reproduction of each piece of music is completed, to
rewind the magnetic tape for a duration equal to the
sum of areduction tim of the recorded piece of music
the operation switch statuses are indicated on a display
unit 16. The control unit 10 also issues control signal for
recording, stopping and rewinding to the tape deck 2.
60
The tape deck 2 has a control unit 20 composed of a
microcomputer and, according to the control from the
control unit 20, performs actions such as recording,
playback and rewinding and also a bias control (de
scribed later) during a cross fade. The control unit 20
feeds the music signal sent from the CD player 1 to a
recording circuit 21 and then to a magnetic head circuit
22, from which the music signal is recorded into the
magnetic tape 4. The music signal recorded on the mag
5,179,543
3
netic tape 4 is read out by the magnetic head circuit 22
and ampli?ed by a reproducing circuit 23 before being
outputted to an external circuit.
4
The next step the control unit 10 takes is to transmit
a control signal to the control unit 20 of the tape deck 2
'
' to rewind the magnetic tape 4 for a speci?ed period of
Next, we will explain about the dubbing operation by
referring to the ?owchart of FIG. 2.
time (step S20). The rewinding time is the sum of the
reduction time tr of the recorded piece of music calcu
When the user presses a dubbing key on the operation
units 15 of the CD player 1, the control unit 10 reads a
program for dubbing process shown in FIG. 2 from a
pieces of music, i.e. tC-l-tO. The control unit 10 then
lated at step S13 and the cross fade time to set between
built-in program memory and executes the dubbing '
turns off a bias circuit of the magnetic head circuit 22
(step S21) and in this condition issues a control signal to
processing.
the pickup circuit 11 to start reading information from
The control unit 10 ?rst sends a control signal to the
pickup circuit 11 to position the pickup device at a
the CD 3. At the. same time, the control unit 10 sends a
control signal to the control unit 20 to set the tape deck
read-in portion of the CD 3 and reads the TOC informa
2 to the record mode (step S22). After this, the control
unit 10 slowly oscillates the bias oscillation circuit of the
magnetic head circuit 22 (step S23) until a speci?ed bias
level is reached a speci?ed time to later (step S24). The
bias level is held at this level thereafter throughout the
recording of this music (step S25). The program then
tion to store information such as the total recorded time
and the playback time of each piece of music in memory
(step 510). Next, the control unit 10 stores in memory
the recordable time Tp of the magnetic tape entered by
the user from the ten-key on the operation unit 15 (step
S11). Then at step S12, it checks whether or not the
total playback time of n pieces of music to be recorded
TD minus the cross fade times T) set between each piece
lasting the period to is formed between the adjacent
of music, i.e. Tp-(n- l)T0, is larger than the record
pieces of music, as shown in FIG. 3, in which the fad
able time Tp of the magnetic tape 4. In other words, it
checks whether the condition Tp- (n- l)T0>Tpholds
ing-out portion of the preceding piece of music A is
overlapped with the fadding-in portion of the succeed
ing piece of music B, thus reducing the overall music
recording time by t¢+t0.
If the music currently being dubbed is the last piece of
returns to step S16.
With the above steps taken, a cross fade portion C
or not. If the time TpiS found to be larger than the time 25
TD—(n-— l)T0, the control unit 10 decides that the
condition does not hole or makes a “no" decision and
stops the processing. In this case, the user may or may
not replace the magnetic tape with other tape 4 whose
music, the control unit 10 makes a "yes” decision at step
S16 and, when the end of the magnetic tape 4 is de
recordable time Tpis shorter, or the control unit 10 may
resume processing to perform the cross fading without
tected (step S26), stops reproduction by the CD player
shortening the playback time of each piece of music.
At step S12, if the time Tp-(n- l)T0 is greater than
1 of the CD 3. At the same time, the control unit 10
sends a control signal to the control unit 20 of the tape
deck 2 to change the tape deck 2 to the stop mode (step
the time Tp, the control unit 10 decides that the above 35 S27) and terminates the processing.
described condition holds or makes a “yes” decision and
While in the above embodiment, the magnetic tape
calculates a playback reduction time tc for each piece of
rewinding time is taken as the sum of the reduction time
music so that the n pieces of music an be recorded
tr of a piece of music and a cross fade time to between
within the recordable time Tp of the magnetic tape 4
the adjacent pieces of music, i.e. tc+t0, it is also possible
(step S13). The reduction time to may be set to a single 40 to shorten the recording time of each piece of music by
common value for all pieces of music or may be made
time t,- and set the rewinding time equal to only the
proportional to the playback time of the individual
pieces of music.
‘
cross fade time to.
In the above example, the recordable time Tp of the
Then, the control unit 10 issues a control signal to the
magnetic tape is entered manually by the user from the
pickup circuit 11 to move the pickup device to the start 45 ten-key of the operation unit 15. The recordable time
position of the ?rst piece of music on the CD 3 and keep
it standing by (step $14). After this, the control unit 10
Tp may be made automatically detectable either by
detecting the reel shaft speed when the magnetic tape
sends a control signal to the pickup circuit 11 to start
starts to be wound or by actually performing the for
reading the music information of the ?rst piece of music
ward feed operation.
Further, in the above embodiment, the operation,
display and control are all performed by the CD player.
These may be partly or totally carried out by the tape
and at the same time sends a control signal to the con
trol unit 20 of the tape deck 2 to set the tape deck 2 in
a recorded mode (step S15). As a result, the music infor
mation of the ?rst piece of music on the CD 3 is repro
duced by the CD player 1 and copied through the tape
deck 2 into the magnetic tape 4.
.deck.
Moreover, the cross fade time, which in the above
55 embodiment is set to a constant time to, may be varied
Then, it is checked whether the piece of music cur
rently being dubbed is the last one on the CD (step $16).
In this instance, because it is not the last music, the
depending on the length of individual pieces of music.
reproduced and keeps it standing by (step S19).
ing:
With this invention, even when the total recorded
time of plural pieces of music recorded on a CD is
control unit 10 makes a “no” decision and then checks
longer than the recordable time of a magnetic tape, it is
if the current music is ?nished (step S17). When that 60 possible to dub all pieces of music into the magnetic
piece of music ends, the control unit 10 stops the repro
tape by shortening the recording time allocated to indi
duction by the CD player 1 of CD 3 and at the same
vidual pieces of music and providing a cross fade por
time sends a control signal to the control unit 20 of the
tion between the adjacent pieces of music, as long as the
tape deck 2 to switch the tape deck 2 to the stop mode
difference between the CD recorded time and the mag
(step S18). Next, the control unit 10 issues a control
netic tape recordable time is within a speci?ed range.
signal to the pickup circuit 11 to move the pickup de
What is claimed is:
vice to the start position of the next piece of music to be
1. A dubbing apparatus for audio equipment compris
5
5,179,543
6
made proportional to the playback time of the individ
ual pieces of music.
4. A dubbing apparatus as claimed in claim 1, wherein
said cross fade is generated by a bias control of said
a reproducing device for reproducing a plurality of
pieces of music recorded on one of an optical disk
and a digital audio tape and outputting the repro
duced music as music signals; and
a recording device having a magnetic head circuit for
magnetic head circuit.
dubbing the reproduced music signals to a mag
netic tape, said recording device stopping a record
ing operation each time the reproduction of each
piece of music is completed, rewinding the mag
5. A dubbing apparatus as claimed in claim 1, wherein
said recording device repeats said stopping, rewinding
and restarting operations between each of said repro
duced music pieces.
netic tape for a duration equal to the sum of a re
6. A dubbin g apparatus as claimed in claim 1, wherein
said reduction time is based upon a difference between
duction time of the recorded piece of music and a
cross fade time, and restarting the recording opera
tion form the rewound position, wherein the music
signal of a next piece of music is reproduced by the
reproducing device while at the same time gradu
a total reproduction time for the plurality of musical
pieces to be reproduced and a total recording time of
said magnetic tape.
7. A dubbing apparatus as claimed in claim 1, further
comprising an operation unit for manually entering a
total recording time of said magnetic tape.
8. A dubbing apparatus as claimed in claim 1, further
ally lowering the recording level of the previously
recorded piece of music for the duration of the
cross fade time, thus overlapping the two adjacent
pieces of music in the cross fade time, said reduc
tion time representing a portion of each repro 20
duced music piece which is deleted from each cor
responding recorded music piece, to enable all of
said reproduced music pieces to be re-recorded.
2. A dubbing apparatus as claimed in claim 1, wherein
said reduction time of the recorded piece of music is a 25
single common value for all pieces of music.
3. A dubbing apparatus as claimed in claim 1, wherein
said reduction time of the recorded piece of music is
comprising:
memory for storing an amount of recordable time
remaining on the magnetic tape and a total play
back time for the plurality of music pieces, and
a controller for determining the reduction based upon
a comparison between the recordable time and the
playback time minus a cumulative cross fade time
between each piece of music.
‘
35
45
55
65
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