JVET-Y0042 AHG7: Modification of and new classes of sequences [G. Martin-Cocher (InterDigital)]

As different resolutions (up to 8K), different average bit rates (from few kbps up to 25 Mbps) and applications will make use of low delay/ lower complexity operating points, this contribution proposes to redefine classes of sequences based on the identification of key scenarios and their characteristics as described in JVET-Y0043. These new or redefined classes of sequences should be used in the LLCC/LD configurations.

This proposed to create a new class S (screen), replacing F and TGM. This would be highly welcome; a good replacement has been sought for a long time.

It was also proposed to modify class E (new sequences, 1080p, vertical content, remove QP22); some concern was expressed about removing QP22; it was suggested to perform visual testing if quality of QP27 is sufficient for this kind of applications. Sequences from JVET-Y0071 could be considered, but more would be desirable.

Other classes: Gaming, Surveillance, Remote control. Some sequences in these categories exist in JVET databases.

Tests needed to be conducted to investigate the RD behaviour of the sequences proposed. This should also include visual inspection. Coordinated effort of AHG4 and 7 was planned.