Q15: H.245 for videoFastUpdateMB, videoFastUpdateGOB, videoNo tDecodedM Bs (Was Q15: Date: Sat, 12 Feb 2000 19:24:45 -0800)

[ari.hourunranta at NOKIA.COM]

Hi

I am not giving any answers, but rather pointing out more problems related
to the topic.

In videoFastUpdateMBs, the statement saying that firstGOB is only relative
to H.263 and firstMB is only relative to H.261 sounds weird. You could
interpret it so that if you are using H.263 Annex K (slices), you should
still request updates for GOBs, although MB-level start index would be much
more natural. In case of MPEG-4 visual, use of videoFastUpdateMBs seems to
be forbidden, although there is no technical reason why it should be (maybe
political?). I am sure most of the implementors use common sense when
interpreting the specifications, but still it wouldn't harm if the
specification would be understandable.

Regards,

Ari

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Ari Hourunranta
Nokia Mobile Phones
ari.hourunranta at nokia.com
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