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http://dx.doi.org/10.3745/KIPSTB.2004.11B.6.625

A Feedback Buffer Control Algorithm for H.264 Video Coding  

Son Nam Rye (전남대학교 대학원 전산학과)
Lee Guee Sang (전남대학교 정보통신연구소ㆍ컴퓨터정보학부)
Abstract
Since the H.264 encoding adopts both forward prediction and hi-direction prediction modes and exploits Variable Length Coding(VLC), the amount of data generated from video encoder varies as Flaying time goes by. The fixed bit rate encoding system which has limited transmission channel capacity uses a buffer to control output bitstream It's necessary to control the bitstream to maintain within manageable range so as to protect buffer from overflow or underflow. With existing bit amount control algorithms, the $\lambda_{MODE}$ which is relationship between distortion value and quantization parameter often excesses normal value to end up with video error. This paper proposes an algorithm to protect buffer from overflow or underflow by introducing a new quantization parameter against distortion value of H.264 video data. The test results of 6 exemplary data show that the proposed algorithm has the same PSNR as and up to 8% reduced bit rate against existing algorithms.
Keywords
H.264/AVC; RDO; Rate Distortion Optimization; Rate Control; Constant Bit Rate; Feedback Buffer Control Method;
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