Low overhead context intializations for arithmetic video codecs

Details Low overhead context intializations for arithmetic video codecs Low overhead context intializations for arithmetic video codecs

2004-04-14

2008-12-09

Wu, Jingge (Department: 2624)

Image analysis

Image compression or coding

Lossless compression

C375S240000, C348S384100

Reexamination Certificate

active

07463781

ABSTRACT:
A method for controlling an arithmetic codec context is disclosed. The method may include the steps of (A) reading a current value indicating one of a first condition and a second condition corresponding to a current context of a plurality of predetermined contexts, (B) generating an input state matching (i) an initial state in response to the first condition and (ii) an output state in response to the second condition, wherein the initial state has a predetermined value and the output state has a value generated by the method before receiving the current context and (C) generating a current output state by performing an arithmetic code operation on an input signal using the input state.

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Marpe, D.; Schwarz, H.; Wiegand, T., “Context-based adaptive binary arithmetic coding in the H.264/AVC video compression standard,” Circuits and Systems for Video Technology, IEEE Transactions on, vol. 13, No. 7, pp. 620-636, Jul. 2003.

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