[Mp4-tech] [H.264] I_PCM mode available in all profiles?

Fredrik Claesson fredrik lsig.nel.co.jp
Thu Apr 7 06:17:00 EDT 2005


Dear Experts,
Is the I_PCM mode available in all profiles?
It was my understanding that the I_PCM mode was part of the Fidelity
Range Extensions, and available only for the High 4:4:4 Profile, as was
presented in "The H.264/AVC Advanced Video Coding Standard: Overview and
Introduction to the Fidelity Range Extensions" (Sullivan, Topiwala,
Luthra), SPIE Conference XXVII, August 2004, chapter 2.1.6.
However, according to the latest Rec. H.264 draft, chapter 0.6, the
following added paragraph seems to indicate that the I_PCM mode is
available in all profiles: "With the exception of the transform bypass
mode of operation for lossless coding in the High 4:4:4 profile and the
I_PCM mode of operation in all profiles..."
Best Regards,
Fredrik Claesson


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