Method for encoding H.264 interesting region

Abstract

The present invention relates to a H.264 interested region coding method, specifically to a method of using code rate to control the coding of interested region, including coding methods at three levels of group-level, image-level and basic unit-level. The invention has advantages of using code rate control algorithm to performing the coding of interested region without adding extra information in the code stream, without limitation to the number and shapes of the interested region, and without adding the complexity of coding algorithm. The invention is a more flexible interested region coding method, which can be applied in all Profile of H.264, and has important application value in video monitoring, and the like fields having high requirement to the integral compression ratio; experiments show that the method is an effective H.264 interested region coding method, is suitable for constant code rate control algorithm and variable code rate control algorithm.

Description

technical field

[0001] The invention relates to a method for coding an H.264 region of interest, in particular to a method for coding a region of interest through code rate control. Background technique

[0002] Region of Interest (ROI) coding can compress the data of the background region as much as possible on the basis of effectively retaining the data of the user's region of interest. As a feature of JPEG2000, it has received more and more attention. H.264 is the latest video coding standard launched by the International Telecommunication Union (ITU: International Telecommunication Union), which integrates many advantages of previous video coders, such as multi-mode selection of I-frame macroblocks, 1 / 4 pixel motion vector, Multiple reference frames, the use of De-blocking technology, etc., these features have greatly improved the coding efficiency of H.264. At all bit rates, H.264 saves 50% of the bit rate compared with H.263, especially at extremely low bit rates, the...

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