[Mp4-tech] question on VUI transfer characteristics

[hudson deng]

Hi,
  Thanks for your information.
  Yes, I'v checked ISO/IEC 14496-2 and found the same description, and I searched on web and found in 14496-2:2004/PDAM 3 this part was revised. But still it doesn't help my problem much.
  Best regards,
  Hudson Deng
Gary Sullivan <garysull windows.microsoft.com> wrote:
      Perhaps those were copied in from ISO/IEC 14496-2.
  Best Regards,
  Gary Sullivan
---------------------------------
  From: mp4-tech-bounces lists.mpegif.org [mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of hudson deng
Sent: Sunday, December 02, 2023 9:51 PM
To: mp4-tech lists.mpegif.org
Subject: [Mp4-tech] question on VUI transfer characteristics
  Hello,
  I'm studying the VUI part of H.264 and found there are two quite special opto-electronic transfer characteristics, the logarithmic 100:1 and 316:1. I think they are special because they two are logarithmic while others are power functions. And I found that there is no such transfer characteristic defined in ISO 13818-2 (2000 version). 
  here are my questions: 
    what's purpose of these logarithmic transfer functions?
    where can I find their initial definition (just some doc like BT.709/SMPTE 240M)?
    in what situation they will be used?
  Any guideline to find further info is welcome.
  Thank you!
  Hudson Deng
---------------------------------
  Be a better sports nut! Let your teams follow you with Yahoo Mobile. Try it now.
---------------------------------
Be a better friend, newshound, and know-it-all with Yahoo! Mobile.  Try it now.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/mp4-tech/attachments/20071206/89a3c041/attachment.html