dvd bitrate resolutions

[Shaorin]

If 720x576 & 352x288 use the same bitrate like 4000 would both resolutions looks the same? or will 352x288 looks burry while 720x576 is clearer

[mats.hogberg]

Depends on the content of the movie, and the resolution of the source material.
The higher resolution will have more detail in low motion sequences, while may suffer from compression artefacts in high motion scenes.
The lower resolution will have lost some detail (if the source material has a higher resolution) but will basically look the same regardless of low/high motion sequences.
Of course this is a generalisation, but you get the idea.

/Mats

[jimmalenko]

Think mathematically. 720 x 576 is 414720 pixels, whereas 352 x 288 is 101376 pixels. So we're talking about 4000 kilobits per second to represent the contents of 25 x those two amounts of pixels. It doesn't take a rocket-scientist to see that it is futile to use the same bitrate on both, since 720 x 576 is actually around 4 x the number of pixels as 352 x288.

Experience also tells me that 4000 bitrate is overkill for 352 x 288 if we're talking MPEG-1 or MPEG-2 and possibly a little on the low side for 720 x 576.