DVD Bitrate

[stalker11]

What is the actual highest bitrate that DVD supports. Everywhere i read it says 9800kbps; however, is this just for the video, or is it 9800kbps combined video, audio and subtitle. And does it matter how many audio/subtitle tracks there are? For example, could DVD support 9 video tracks and 8 5.1 channel audio tracks?

[Vejita-sama]

Take a look to the left under 'that is DVDR'.

[stalker11]

Actually, that's "What is DVDR". And if you read my post, I mentioned that everywhere I read it said 9800kbps. However, the DVDR page here is not specific if it is combined or not. It says 9800kbits under video, and doesn't mention any bitrates under audio. The chart says 3000-8000, but I have made a working DVD with 9000 for video.

[bugster]

AFAIK, that 9800kbps is for a combined video, audio and subtitle stream. Wether this includes multiple audio and subtitle streams that may be present I am not sure. I know it doesn't include multiple angle or seamless branching stuff though. For more info try http://www.dvddemystified.com/dvdfaq.html

[SLK001]

The MAXIMUM combined bitrate is 10.08Mbps, of which up to 9.8Mbps can be video.

[ImaWeTodd]

For more info try http://www.dvddemystified.com/dvdfaq.html

Maximum video bit rate is 9.8 Mbps. The "average" video bit rate is around 4 Mbps but depends entirely on the length, quality, amount of audio, etc. This is a 31:1 reduction from uncompressed 124 Mbps video source (or a 25:1 reduction from 100 Mbps film source). Raw channel data is read off the disc at a constant 26.16 Mbps. After 8/16 demodulation it's down to 13.08 Mbps. After error correction the user data stream goes into the track buffer at a constant 11.08 Mbps. The track buffer feeds system stream data out at a variable rate of up to 10.08 Mbps. After system overhead, the maximum rate of combined elementary streams (audio + video + subpicture) is 10.08. MPEG-1 video rate is limited to 1.856 Mbps with a typical rate of 1.15 Mbps.

More than I ever wanted to know.

How long do you think it would take my apex to catch fire going at 9.8Mbps CBR?

[SLK001]

Catch fire? If you would have read what you posted, the player reads data from the disc at a constant 26.16Mbps - a lot faster than the 9.8Mbps max video rate. If it can handle reading the data, it should be able to output the video stream.

[ImaWeTodd]

Catch fire? If you would have read what you posted, the player reads data from the disc at a constant 26.16Mbps - a lot faster than the 9.8Mbps max video rate. If it can handle reading the data, it should be able to output the video stream.

I was just trying to be light hearted. I do really like the Apex player's I've had.


However, I did read it. Actually, I read it in hard copy not too long ago.

The track buffer feeds system stream data out at a variable rate of up to 10.08 Mbps.

When it comes out of the buffer, do you think the player has to processes it some more (demultiplex, decode) ? Just because it can read to the buffer quickly, do you think it can handle a high constant rate? Maybe.

Might be an interesting test disc to take to the local shop.