Adaptive motion information cost estimation with dynamic look-up table updating

摘要

Adaptive motion information cost estimation is achieved in processing video information. A transmission cost is estimated that is associated with encoding a motion vector difference (mvd) in motion vectors that describe a motion characteristic of the video information. The mvd is encoded based on minimizing a rate estimation mismatch associated with the motion vectors. The encoding step includes computing a bit count associated with the mvd using CABAC. A value is indexed that corresponds to the cost from one or more entries in the lookup table. The cost relates to context or content characteristics associated with the video information. The lookup table is adaptively updated based on a change in the contextual information or content characteristics. The value is dynamically adjustable based on the change.

主权项

1. A method for processing video information, comprising the steps of:
estimating a transmission cost of CABAC encoding a difference between a motion vector, which is descriptive of a motion characteristic of the video information, and a predictor of the motion vector; wherein the estimating step comprises the steps of:
initializing a lookup table;accessing the lookup table;retrieving a cost value that is indexed by the motion vector difference from the lookup table; andadaptively updating the cost value in the lookup table based at least on a collected actual encoding rate of the motion vector difference.