International organisation for standardisation organisation internationale de normalisation

Version 1 bug reports and cleanup (2)

See also notes for P0187 (no_output_of_prior_pics_flag) and P0043 (AU boundary detection) and P0044 (MinCR) and P0130 (end of bitstream).

LS input from ITU-R to the parent body is relevant to the VUI. Decision: Correct the equations accordingly.

14.1.97.1.1.1.1.1.90JCTVC-P0064 Defect correction for HEVC version 1 (esp. modulo CPB removal delay wrapping) [G. J. Sullivan, L. Zhu (Microsoft), Y.-K. Wang, A. K. Ramasubramonian (Qualcomm)]

Discussion chaired by M. Hannuksela 01-16.

This contribution proposes an alternative to the approach previously proposed in JCTVC-N0094 to handling modulo wrapping for interpretation of the value of the syntax element au_cpb_removal_delay_minus1 for pictures that begin new buffering periods.

The prior planned fix for the reported problem included introducing a syntax change to version 1 bitstreams. This contribution suggests that the syntax change is unnecessary and that an alternative interpretation of how to compute CPB removal delays is actually what was intended when the version 1 syntax (and the similar syntax in AVC) was originally designed. An alternative approach to the reported problem is proposed that does not include this syntax change.

The contribution also suggests follow-up action to initiate a clarification of the same aspect of the AVC specification.

A couple of other editorial corrections for HEVC version 1 are also reported. These are asserted to be obvious corrections and merely typographical in nature.

It was requested the update HM according to the proposal.

Two other very small errata reports were included in the contribution.

Decision: Adopt.

Parent bodies may wish to make note of the AVC action request.

14.1.97.1.1.1.1.1.91JCTVC-P0223 JPNB comment on HEVC defect report [Japan National Body]

A defect report of HEVC (23008-2) was produced at Geneva meeting (WG 11 document N 13931). It includes the syntax change of HRD parameters. Although the number of fixes is small, it was asserted to be desirable to produce such correction in formal way to avoid market confusion. JPNB requested WG11 to issue a corrigendum of 23008-2 as soon as possible.

After discussion, it was agreed that finalizing the approval of the corrections ASAP is desirable, and that rather than issuing a separate corrigendum, it was planned to integrate the corrections into near-term amendments.

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