Can you tell the difference in these 2 resolutions?

[hardbody6pack]

If a movie is converted with the same bitrate to SVCD 480 x 480 and also converted to VCD 352 x 240, would you be able to see the difference in the quality?

[Mirror_Image]

Both at 1150 CBR? Because that's the only bitrate that an actual VCD does.

[adam]

Definitely yes, but which one is higher quality depends on what bitrate you use. Bitrate and resolution go hand in hand and the goal should be to find the best compromise between the two.

Larger resolution means sharper picture but you have more overall pixels. Since you have the same bitrate, in your example, that same amount of bitrate is being spread over many more pixels, which results in more artifacts and overal lower picture quality.

Lower resolution makes for a blurrier picture and also at 352x240 aliasing becomes much more noticable, (staircase like effect on diagonal lines.) But since you have less pixels to encode there will be fewer artifacts and more of the picture quality will be retained.

So to answer your question specifically...

If you make an xVCD (non-compliant vcd) at SVCD'ish bitrates it will probably have slightly less artifacts than a SVCD but the aliasing and blurrier picture will probably make it lower quality than the SVCD.

If you encode a svcd at 1150k (VCD required bitrate) then it will have many more artifacts than a VCD and will be much lower quality.

[hardbody6pack]

So what you are saying is that it's better to have lower resolution with higher bitrate then higher resolution with lower bitrate?

[Mirror_Image]

I believe that he is saying that a VCD (352x240 MPEG-1 with a bitrate of 1150kbps CBR) will look better than a 480x480 MPEG-2 with a bitrate of 1150 CBR.

You said both the same bitrate, which would be dictated by the "VCD", which has a bitrate of 1150kbps CBR, which just isn't enough to do justice to a 480x480 video.