DVMHD Encoding Parameters (High-Definition)
- MPEG2 files must be encoded as a Transport Stream.
- Elementary Video stream must be Main Profile High Level MP@HL 4:2:0.
- Elementary Audio Stream is required and must be AC3 or MPEG1 layer II encoded. Bitrates of 192, 224, or 384 kbps are supported.
- Source audio before encoding is 16 bit at 48 or 44.1 kHz sample rate. -Transport stream packet size is 188 bytes or 224 bytes.
- Stream must start with an I frame and finish on a 188 bytes packet boundary.
- Main resolutions supported are: 1920 x 1080 x 29.97 (or 30) interlace, 1280 x 720 x 59.94 (or 60) progressive, and 1920 x 1080 x 25 interlace
- Recommended Video PID numbers are 0x11, 0x21 and 0x31. Audio PID numbers are video PID +3. Try to ensure that all files are encoded with the same PID. We typically use 0x31 which is 49 in decimal.
- ATSC bit rate is 19.39Mb/s. Higher bit rates up to 50Mb/s can be accommodated.
- Constant Bitrate (CBR) or Variable Bitrate (VBR)
- Group of Picture (GOP) Structure is CLOSED.
- Normally 13 or 15 frames / GOP.
- I B and P frames will provide the most efficient compression.
- Preferably each GOP will contain a sequence header.
- MPEG2 files must be encoded as a Program Stream.
- Elementary Video stream must be Main Profile Main Level MP@ML 4:2:0.
- Elementary Audio Stream must also be included and must be AC3 or MPEG1 layer II encoded. Bitrates of 192, 224, or 384 kbps are supported.
- Source audio before encoding is 16 bit at 48 or 44.1 kHz sample rate.
- The two main resolutions supported are 704 x 480 x 29.97 (NTSC) and 704 x 576 x 25 (PAL)
- Maximum Program Stream bitrate is 15Mbps.
- Constant Bitrate (CBR) or Variable Bitrate (VBR)
- Group of Picture (GOP) Structure is CLOSED.
- Normally 13 or 15 frames / GOP.
- I B and P frames will provide the most efficient compression.
- Preferably each GOP will contain a sequence header.
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