Dear all,
I have few quick comments 1) Table 6. It seems that the parameters there only constrain the maximum pixel rate, which is not sufficient for containing decoder implementation cost. We need to have additional parameters to restrict decoder on/off chip memory footprint and entropy decoding throughput. At least the following parameters are missing: * Maximum horizontal picture size => impacts line buffer size * Memory size for buffering bitstream and decoded reference pictures => impacts off-chip memory size * Maximum bit-rate and minimum compression ratio => impacts entropy decoding throughput requirement for real-time decoding 2) Section 3.1 if YUV 4:4:4 is a basic requirement, there should be no problem for a same codec to support RGB 4:4:4 color sample format. Therefore, YUV/RGB 4:4:4 should be put in a same place (either in section 3.1 or in 3.2) 3) HDR (high dynamic range) should belong to section 3.1. 4) WCG (Wide Color Gamut) support is missing, e.g. color space BT.2020, DCI-P3, BT.709 and OETF (ST.2084, HLG, BT.1886) 5) Section 4.1 since H.265 is taken as reference codec for compression efficiency comparison, why not taking JCTVC approach to do subjective quality evaluation, i.e. using 4 fixed QPs (could be sequence dependent to match the target bit-rates) and computing BD-rate difference at the end? Regards, Minhua -----Original Message----- From: video-codec [mailto:[email protected]] On Behalf Of Adam Roach Sent: Thursday, January 14, 2016 1:56 PM To: [email protected] Subject: [video-codec] Call for review comments: draft-ietf-netvc-requirements NETVCers: In Yokohama, we adopted draft-ietf-netvc-requirements as a working group item. The current document has taken into account most of the comments from that meeting. Please take a few moments to read over the current document, looking in particular for requirements that you think may be missing: https://tools.ietf.org/html/draft-ietf-netvc-requirements-00 Thanks! /a _______________________________________________ video-codec mailing list [email protected]<mailto:[email protected]> https://www.ietf.org/mailman/listinfo/video-codec
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