#### DVD - MPeg differences

DVD uses a subset of MPeg standards ISO/IEC 11172 (MPeg-1) and ISO/IEC 13818 (MPeg-2).

Restrictions
- Streams - 1 video, up to 8 audio
- Coding - MPeg-1 vbr/cbr, MPeg-2 MP@ML or SP@ML vbr/cbr
- Data rate
  - MPeg-1 maximum video 1856Kbps, maximum audio 384Kbps
  - Mpeg-2 maximum video 9800Kbps, maximum audio 912Kbps
  note: audio options other than MPeg exist, see extensions
- Image size
  - Mpeg-1 352x240 (NTSC) or 352x288 (PAL/SECAM)
  - Mpeg-2 720x480, 704x480, 352x480 (NTSC)
    720x576, 704x576, 352x576 (PAL/SECAM)
- Frame rate
  - coded - 24fps progressive, 29.97fps interlaced (NTSC only), 25fps interlaced (PAL/SECAM only)
  - displayed - 29.97 (NTSC) and 25fps (PAL/SECAM)
- Color space
  - color primaries and transfer characteristics
    NTSC - 4 (ITU-R BT.470 M) or 6 (SMPTE 170 M)
    PAL - 5 (ITU-R BT.470 B or G)
  - matrix coefficients (RGB to YCbCr)
    5 (ITU-R BT.470 B or G) or 6 (SMPTE 170 M)
- Audio sampling rate - 48KHz (MPeg audio only, other audio formats have their own rates)
- Aspect ratio - either 4:3 or 16:9
- GOP max
  - MPeg-1 18 frames (NTSC), 15 frames (PAL/SECAM)
  - MPeg-2 36 fields (NTSC), 30 fields (PAL/SECAM)
  note: typical rate is .5 seconds, with one GOP per VOBU
  note: GOP's are NOT optional
- pack size - fixed at 2048 bytes, system stream level (one DVD sector)
- Low delay - not permitted

Extensions
- Private stream 1 (Audio and subpictures)
  - sub-stream 0x20 to 0x3f are subpictures
  - sub-stream 0x80 to 0x87 are AC3 audio
  - sub-stream 0x88 to 0x8f are DTS audio
  - sub-stream 0xA0 to 0xA7 are LPCM audio
- Private stream 2 (Navigation) - see PCI packet and DSI packet

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