VCD or CVD

[yxw1]

If I lower CVD bitrate to 1150k, does it have the same picture quality as VCD or worse? As I understand, the pic quality depends on bitrate/pix. In the case, CVD must be encoded at 2300k to achive the same bitrate/pic rate as VCD, 'cause 1150k / (352 x 240) = 2300k / (352 x 480). What I did wrong here? Can anyone please tell me at what bitrate (approximate) VCD and CVD has almost same picture quality?
Thanks.

[Conquest10]

cvd has a higher resolution than vcd so it needs a higher bitrate to look good. but at the correct bitrate, cvd will look better than vcd because of the higher resolution.

[ZippyP.]

Nobody can tell you what bitrate looks good, because that would be your personal choice. However, using 2-pass VBR with the average at 1500, 2300 max., 400 min., then CVD looks pretty good to me. You're going to have to test and see for yourself. If you're using CBR then just do some short clips.

8)

[vcd4ever]

yxw1,

You haven't done anything wrong, a cvd encoded at 2300 (same bitrate/pix as a vcd) has the same quality as a vcd. The reason why the cvd looks better is it's higher resolution.

vcd4ever.

[SatStorm]

.... and because CVD supports (like SVCD and DVD) interlace, while VCD only progressive. And that makes a huge difference in sharpness for mainstream TVs (non HDTVs).

Using corrected (by filters...) source, an average of 2000kb/s for CVD gonna look excellent for the 95% of time. Lower, you start having problems!

[vdvorsta]

VCD use MPEG1 and thats optimized for low bitrates
CVD or SVCD use MPEG2 and is optimized for high bitrates

If you compare MPEG1 to MPEG2 (both same resolution) with a bitrate lower then 1800kbit/s than MPEG1 is better. If the bitrate is higher then MPEG2 is the best.

[xtreemkareem]

Personally, I like CVD because it has several advantages over VCD. It's higher resolution (352X240 NTSC, 252X576 PAL) makes it much sharper than VCD. It has the same number of vertical lines as DVD and SVCD (480 NTSC, 576 PAL). It has the official SVHS resolution and it roughtly the the highest reolution you can capture from an analog source (384 X 480 NTSC). Also, the CVD reolution is a legal DVD resolution, so if your player supports 48 KHz audio for SVCD/CVD, you can encode your DVD movies on CD-R's today as CVD, and transfer them tommorrow as DVD to DVD+/-R(W) without any rencoding whatsoever (as long as you encoded your CVDs wiht the correct GOP structure and audio frequency)! CVD should be playable on most SVCD compatible players and with a slightly lower resolution than SVCD (not noticible on regular TV's, only on HDTV), you get more data per frame at the same bitrate with CVD, therefore better qualot for CVDs encoded at the same bitrate without any noticile difference in resolution! For our MPEG 1/2 fans without DVD burners, the choice of quality is deffinitely CVD. Then again, if you encode everything as high quality DIVX, you can rencode as DVD later, but man do you lose some of the quality!