DC Component Precision

[widemouth]

Hello,

Could someone please supply a description of the "DC Component Precision" setting in TMPGEnc?

Im interested in its effect when encoding MPG2 for SVCD's and if it would effect the SVCD's compativility in DVD players.

Thanks in Advance.

[BJ_M]

The DC component represents the average brightness of a block (8x8 pixel region). In MPEG-1 video this is fixed to 8 bits, but MPEG-2 allows higher precision. It is important that the DC component is accurately represented, so a setting of 10 is recommended for MPEG-2 sequences, unless you are encoding using a low bitrate.

This controls the precision of the discrete cosine values used in the image compression (this compression is similar to the one used in JPEG images). A higher value results in better quality.