Question on DVD-Video format

Discussion in 'Archived Threads 2001-2004' started by Jeff Kleist, Mar 12, 2002.

  1. Jeff Kleist

    Jeff Kleist Executive Producer

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    To solve an arguement, is the below information correct?

    The maximum bitrate of DVD-Video is 10Mbps, with a max sustained bitrate of 9.8mbps.

    You must fit all data, video, audio(including DD,DTS,PCM etc etc etc), and subtitles inside of this stream, which is multiplexed into, and read as one big file from the disc(the VOB file), and the total data stream of all video, audio, and subtitles, at any one second cannot exceed 10Mbps
     
  2. RicP

    RicP Screenwriter

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    The maximum data rate for DVD is 11.08 Mbps after demodulation and error correction.
    Explained another way, a 1x DVD-ROM drive transfers data at 11.08 Mbps. When playing DVD-Video, 1 Mbps is taken up by navigation overhead, leaving 10.08 Mbps for application data streams. The max for a single DVD-Video video stream is 9.8 Mbps. The max for a single DVD-Video audio stream is 6.144 Mbps.
    The combined max is 10.08 Mbps. This means you could have a video stream at 9.8 Mbps, plus an audio stream at 0.28 Mbps (280 kbps). Since there are no audio encoding settings that result in a 280 kbps stream, it's more likely that you would have a 9.69 Mbps video stream and a 384 kbps audio stream if you wanted to totally max out all available space.
    Incidentally, DVD-Audio allows a max audio stream data rate of 9.6 Mbps.
     
  3. KeithH

    KeithH Lead Actor

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    Ric, good info. and very well explained.
     
  4. Jeff Kleist

    Jeff Kleist Executive Producer

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    But specifically, PCM, DD, DTS etc all have to be part of that bitstream and are not "outside" of that correct?
     
  5. RicP

    RicP Screenwriter

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    Yes, Jeff that's correct. Everything that the disc supports is included in the stream.

    However, there are rare cases in which there are different streams (like "White Rabbit" stuff, and seamless branching kinds of things)

    In these cases you usually cannot switch "on the fly" so to speak and must stop the playback and choose another stream.
     

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