The Joint Collaborative Team on Video Coding (jct-vc) of itu-t wp3/16 and iso/iec jtc 1/ sc 29/ wg 11 held its tenth meeting during 11-20 July 2012 at the City Conference Centre (ccc), a k. a

Level	Max luma sample rate MaxLumaPR (samples/sec)	Max luma picture size MaxLumaFS (samples)	Max bit rate MaxBR (1000 bits/s)	Min Compression Ratio MinCR	MaxDpbSize (picture storage buffers)
Max CPB size (1000 bits)
6.1	2,005,401,600	33,423,360	500,000	8	6	500,000
6.2	4,010,803,200	33,423,360	800,000	6	6	800,000
6.3	5,308,416,000	44,236,800	1,000,000	6	6	1,000,000

It was commented that, if necessary, such a level could be added in a version beyond version 1, and that the consideration may somewhat depend on whether a still-picture profile is planned. For further study.

JCTVC-J0334 Adding a Level Restriction on Coding Tree Block Size [W. Wan, T. Hellman (Broadcom)]

This contribution recommends a level-specific limit on Coding Tree Block (CTB) size to facilitate high-performance decoder implementations. Specifically, it proposes to limit the minium CTB size to 32x32 for level 5 and higher (while still requiring decoding of lower level bitstreams). It claims that this limit reduces line buffer storage requirements and increases decoder performance, and that such a limit has negliglble coding efficiency impact and only a minor impact on low-latency implementations.

Decision: Agreed.