8VSB/NTSC Dual Modulator Card

8VSB/NTSC Dual Modulator Card
HDTV 998C
Sencore’s HDTV998C is an ATSC/NTSC television
KEY FEATURES
signal output card. It is a single card solution for
• Simultaneous Digital and Analog Signal Output
▪ ATSC/8VSB modulated RF signal on channels 14-21
▪ Simultaneous NTSC modulated RF signal on VHF 3-13
▪ Both tuned through software API
delivering ATSC/MPEG source material in both
Digital and Analog formats. The card provides
dual modulated television outputs based on the
NTSC and ATSC standards. The input to the card
is an ATSC MPEG2 transport stream delivered via
the PCI interface.
A simple program interface (API), robust low-level
software drivers, and sample code in the Software
Developer’s Kit (SDK) are provided to simplify
integration and minimize start-up time.
APPLICATIONS
• Retail Television-Wall video source with simultaneous
Digital and Analog formats.
• Digital signage video output card.
• Robust Software Drivers and API
A simple program interface (API), robust low-level
software drivers, and sample code in the Software
Developer’s Kit (SDK) are provided to simplify integration
and minimize start-up time.
SPECIFICATIONS
8VSB/NTSC Dual Modulator Card HDTV 998C
ATSC RF OUTPUT
VISUALLY-SEAMLESS SPLICING
Channel Range:
Connector:
Output Impedance:
Output Level:
MER (SNR):
Modulation Type:
A/V Formats:
UHF 14-21 (User Selectable)
“F” type RF connector
75 Ω
+23 dBmV (nominal)
> 27 db
8 level VSB for ATSC Broadcast.
All formats modulated as encoded in
MPEG transport stream file.
Channel Range:
Output connector:
Output impedance:
Output power level:
Display Modes:
Audio Mode:
VHF channel 3 through 13
(User Selectable)
“F” connector
75 Ω
+19 dBmV +/- 2db
Letterbox, cropped or full-screen.
(User Selectable)
Mono
NTSC RF OUTPUT
FILE ENCODING REQUIREMENTS
File Type:
MPEG2 Transport Stream (TS) file.
TS Multiplex Rate:
19.392658 Mbps +/- 54 bps (ATSC)
TS Packet Size:
188 Bytes
Other File Specs:
The TS file begin and end on whole TS
packet boundaries. and contain an
integer number of TS packets.
Minimum File Size:
16 MB (6.6 secs @ 19.392658 Mbps)
Video Format:
Any of 18 ATSC Formats (per ATSC A/53b)
Audio Encoding:
AC-3 (per ATSC A52)
Data Tables :
MPEG2 compliant Program Specific
Information (PSI) tables (PAT and PMT)
must be present.
File Play-lists:
For best results when concatenating
multiple files in a play-list, the following
guidelines should be followed:
• Use the same video, audio , and PCR PID assignments for all files.
• Encode video and audio using the same format for all files.
• Begin and end each file with 10 frames of black video.
ATSC PSIP TABLE REQUIREMENTS
Placeholders for a minimal set of ATSC PSIP/PSI tables must be
present in order to provide channel information required by consumer
receiving devices. (Refer to ATSC docs A65 and A69). PSIP/PSI should
be multiplexed into the TS file with the PIDs and repetition intervals
shown:
TABLE:
PID RATE
PAT:
0 (0x00) 100 ms
PMT:
16 (0x10) 400 ms
MGT:
8187 (0x1FFB) 150 ms
TVCT:
8187 (0x1FFB) 400 ms
STT:
8187 (0x1FFB) 1000 ms
RTT:
8187 (0x1FFB) 60s (1 per file min)
EIT-0:
8144 (0x1FD0) 500 ms
EIT-1:
8145 (0x1FD1) 500 ms
EIT-2:
8146 (0x1FD2) 500 ms
EIT-3:
8147 (0x1FD3) 500 ms
Note: In seamless play mode, the PSIP and PSI sections will be
overwritten to ensure a consistent broadcast stream from file to file.
PCR accuracy < 500ns
PTS/DTS accuracy < 1/90khz
TS Packet continuity Per ISO/IEC 13818-1 2.4.3.3
Table Versions continuity Per ISO/IEC 13818-1 2.4.4
SEAMLESS MODE REQUIREMENTS (in addition to above)
Seamless play mode requires each file to begin and end with a
“seamless splice point” (per SMPTE-312M) along with the following
restrictions:
Lead in/out frames:
No restriction
Fade-in/out:
No restriction
Video Format:
ATSC “1080i”. The encoded video
format must be consistent for all files to
be spliced in a play-list.
Programs: Single program w/ one video and one audio service.
Packet ID’s:
PMT PID:
16 (0x010)
PCR PID:
17 (0x011)
Video PID:
17 (0x011)
Audio PID:
20 (0x014)
TS FILE START
The first GOP in the file MUST be CLOSED
TS FILE END
The file should NOT be padded with additional null packets.
VBV METHOD
The VBV_delay at the beginning and end of every file must be
the same to ensure that the video buffer does not underflow or
overflow at the splice point. This concept is identical to the SPMTE312M restrictions on “splice_delay”. This requirement can be
achieved by using a constant VBV_delay throughout all files, or by
using an encoding algorithm that forces VBV_Delay to a consistent
value at the beginning and end of all files. VBV_delay can be
examined as the delay between the access unit arrival (in PCR time)
and the actual stamped decoding time per DTS/PTS.
SOFTWARE
A software developer’s kit (SDK) is available with drivers, libraries
and sample applications for Windows based operating systems. A
basic file player utility is also available for simple applications.
GENERAL CARD SPECIFICATIONS
RF output synchronization:
O/S Compatibility:
Product form factor:
PCI Compliance:
Size:
Weight:
Power consumption:
Operating Temperature:
Humidity:
< 20 mSec.
Win 2000/2003/XP
Single-slot, Universal PCI bus card
PCI 2.2, PCI-X 2.0
Approx. 6” x 4” x ¾”
(Length x height x clearance)
~ 6 ounces
Less than 10W
10 to 40 degrees C
(50 to 104 degrees F)
Less 95% (non-condensing)
TYPICAL PC REQUIREMENTS
Controller:
Memory:
Drive type:
Serial ATA:
2.0 GHz Celeron or better)
256 MB or more
Any (for single card systems)
(for multi-card systems)
605.978.4600
www.sencore.com
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