[Mp4-tech] [h264] Negative qp

[h M]

Dear experts,
In 8.5.2 section, I have found the following note:
NOTE 1 - QP quantisation parameter values QPY and QSY are always in the
range of -QpBdOffsetY to 51, inclusive. QP quantisation parameter
values QPCand QS
C are always in the range of -QpBdOffsetC to 51, inclusive.
So, could we really have a negative QP for either luma or chroma? And what
does it means ?
Best regards
Hichem
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/mp4-tech/attachments/20070216/79ecc830/attachment.html