[Mp4-tech] Is it possible to separate chroma prediction and luma predictioninintra prediction of H.264 ?

[Park Jun Sung]

Hi, experts.
I have a question about Chroma intra prediction in H.264.
The current structure of the codec forces all intra decisions to be
performed for each possible Chroma intra prediction mode. 
As a result, the computation complexity is significantly increased.
So the flag, ChromaIntraDiable, is introduced in JVT-N014 (Jan., 2005) to
reduce complexity by allowing DC Chroma prediction only.
It is a kind of temporal technique because there is an intention of fixing
the JM software but lack of time.
(JM is focusing to optimize rate/distortion, so it is needed to enhance the
complexity.)
Now the question,
Is it possible to totally separate Chroma prediction from Luma prediction
in intra prediction?
If each of Chroma prediction and Luma prediction performs independently,
the computation complexity will be decreased greatly.
Thanks in advance.
Regards,
Richard Park
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