Kenyon & Kenyon LLP
Coherence groups: region descriptors for low bit rate encoding
The invention is directed to an efficient way for encoding and decoding video. Embodiments include identifying different coding units that share a similar characteristic. The characteristic can be, for example: quantization values, modes, block sizes, color space, motion vectors, depth, facial and non-facial regions, and filter values. An encoder may then group the units together as a coherence group. An encoder may similarly create a table or other data structure of the coding units. An encoder may then extract the commonly repeating characteristic or attribute from the coding units. The encoder may transmit the coherence groups along with the data structure, and other coding units which were not part of a coherence group. The decoder may receive the data, and utilize the shared characteristic by storing locally in cache, for faster repeated decoding, and decode the coherence group together.
Apple Inc.
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Jae Hoon Yunfei Xiaosong Albert E. Hsi-Jung Dazhong Chris Y. David R.
Kim Zheng Zhou Keinath Wu Zhang Chung Conrad