JCTVC-J0526 AHG9: Mental Cross-check of JCTVC-J0156 - Generalized definition of the TLA for scalable extension [S. Deshpande (Sharp)] [late]
JCTVC-J0246 On temporal layer access pictures [B. Choi, Y. Park, I. Kim, J. Kim, J. Park (Samsung)] [late]
Similarly to the BLA picture, an additional picture type called a “broken link TLA (BLT)” is proposed for identifying the TLA pictures with a broken link or a temporal layer switching. The leading pictures associated with the TLA or BLT is also marked as TFD pictures for easy discarding in systems.
It was remarked that one example shown corresponds somewhat more to a CRA case than a BLA case.
It was questioned whether the coding efficiency improvement likely to be provided using the example scheme would be worth the complication of adding more NUTs to support this.
It was noted that the example case only applies to high-delay encoding.
No simulation results were provided to establish the coding efficiency advantage.
It was remarked that there was a temporal layer switching point SEI message in SVC that can provide such functionality (not using a NUT).
No cross-check was provided.
For further study.
JCTVC-J0305 AHG10: On Gradual Temporal Layer Access [S. Deshpande (Sharp)]
This document proposes gradual temporal layer access (GTLA) pictures. It is asserted that the GTLA pictures provide more flexibility in selection of reference pictures while providing temporal layer switching functionality. It is asserted that gradual temporal layer access functionality is useful in allowing selection of desired frame rate in a step-by-step manner.
No simulation results were provided to establish the coding efficiency advantage.
Decision: Adopted.
JCTVC-J0500 AHG10: Mental cross-check of JCTVC-J0305 (On Gradual Temporal Layer Access) [M. M. Hannuksela (Nokia)] [late]
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