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8VSB Modulator Card

HDTV998E

Sencore’s HDTV 998E is a low-profile PCI-Express, ATSC/RF television signal output card. The card provides a fully-agile (Channels 2-69) modulated television output based on the ATSC standard. The HDTV 998E streams an MPEG-2 transport stream delivered to the card via the PCI Express 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.

  • Fully Agile Digital Signal Output ATSC/8-VSB modulated RF signal on channels 2-69 (tuned through software API). RF level +12 dBmV, 75 ohm.
  • The HDTV 998E card will pass all ATSC compliant streams in their current resolution (up to 1080i).
  • Robust Software Drivers and API Robust low-level software drivers, a simple program interface (API), and sample code (SDK) are provided to simplify integration and minimize start-up time.
  • Retail Television-Wall digital video signal source
  • Digital signage video output card

ATSC RF OUTPUT
Frequency Range: 57 to 803 MHz (Channels 2 through 69)
Output Connector: “F” type RF connector
Output Impedance: 75Ω
Output Level: +12 dBmV (nominal)
MER (SNR): > 27 db
Modulation Type: 8VSB for ATSC Broadcast.
A/V Formats: All formats modulated as encoded in
MPEG transport stream file.

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.

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.

VISUALLY-SEAMLESS SPLICING
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 with 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 SPMTE-312M 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
O/S Compatibility: Win 2003/XP
Product form factor: Single-slot, low-profile, x1 PCI Express bus card
PCI Compliance: PCI 2.2, PCI-X 2.0
Size: Approx: 6.6” x 2.7” x 0.875” (Length x height x clearance)
Weight: ~ 6 ounces
Power consumption: Less than 10W
Operating Temperature: 10 to 40 degrees C (50 to 104 degrees F)
Humidity: Less 95% (non-condensing)

TYPICAL PC REQUIREMENTS
Controller: 2.0 GHz Celeron or better)
Memory: 256 MB or more
Drive type: Any (for single card systems)
Serial ATA: (for multi-card systems)

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