Is 2600 kbps the max combined SVCD bitrate, or just video?

[Hateslife]

For a perfectly standards compliant SVCD, is 2600 kbps the maximum for just the video, or total?

In any case, is it 2.6 mbps or 2600 kbps? There is a difference, but I don't know which one it is..

[Hateslife]

Can you say "bump"?

[snowmoon]

Ok... math time folks lets figure it out...

SVCD = 2x drive mechanism = 150 sectors/s
SVCD sector = 2324 bytes/sector

150 * 2324 = 348600 bytes/second in total datarate
348600 * 8 ( bits/byes ) / 1024 ( bits/Kbit ) = 2723Kbps or 2.659Mbps

Being pessimistic I'de say 2700 before we account for mpeg stream overhead like scan offsets and pack alignment.

So... despite what some people might want to do, 2600-2650 total for audio/video look like it's the limit if you want your disks to be compatible with the SVCD spec. You might be able to get away with higher peaks for very short periods of time, but only due to mpeg buffering that you should not assume will always protect you.

[Yeshi]

just video. i tested this myself on my DVD player. the player onky starts chugging after the VIDEO bitrate goes over 2600. so the MAX combinedSVCD bitrate you can have is 2920kb/s.

[Peter]

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On 2001-10-20 03:01:33, Yeshi wrote:
just video. i tested this myself on my DVD player. the player onky starts chugging after the VIDEO bitrate goes over 2600. so the MAX combinedSVCD bitrate you can have is 2920kb/s.
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What DVD player do you have?
I have a Pioneer 343 and if I have a stream of 2920 total, it's not playing smooth.

[vitualis]

What snowmoon calculated is obviously the correct answer.

Yeshi, what your particular stand-alone player can handle (especially a DVD player) is irrelevant to what is allowed for under the SVCD standard.

Regards.

[Yeshi]

SVCD standard. uh huh. and where exactly is the SVCD standard for bitrate defined, other than on this website? i have a DV-535k. it plays fine with video 2600kb/s and audio 128kb/s. The combined bitrate is 2728kb/s, but that is only the MAX rate, b/c im using a CQ_VBR.

[Yeshi]

<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR size=1 color=black></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>
What DVD player do you have?
I have a Pioneer 343 and if I have a stream of 2920 total, it's not playing smooth.
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Ok what are u using, like a video stream of 2600 and audio of 320? or video of 2800 and audio of 128? once the video goes past 2600 it starts to chugg. but 2920 with audio/320kb/s video plays fine.

[snowmoon]

Yeshi,

Without doing a CBR encode it would be impossible to tell if the player supported it or not, as you have NO IDEA if the peak bitrate is even being hit, and if it is for how long.

When you do a 2600 CBR vide with 320 audio SVCD and cam play it back on all SVCD player ( or even a few ) listed on the DVD players list without problems let me know.

The calculations I provided clearly state that a rate of 2920 is physically imposible for a 2x drive mechanism to keep up with.