Rate-distortion analysis for H.264/AVC video coding and its application to rate control

In this paper, an efficient rate-control scheme for H.264/AVC video encoding is proposed. The redesign of the quantization scheme in H.264/AVC results in that the relationship between the quantization parameter and the true quantization stepsize is no longer linear. Based on this observation, we pro...

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Vydáno v:IEEE transactions on circuits and systems for video technology Ročník 15; číslo 12; s. 1533 - 1544
Hlavní autoři: Ma, S., Gao, Wen, Yan Lu
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York, NY IEEE 01.12.2005
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Applied sciences
Automatic voltage control
Buffers
Coders
Coding
Coding, codes
Decoding
Encoders
Encoding
Exact sciences and technology
H.264/AVC
hypothetical reference decoder (HRD)
Information, signal and communications theory
Mathematical analysis
Mathematical models
Motion control
Process control
Quantization
rate control
Rate-distortion
rate-distortion optimization (RDO)
Signal and communications theory
Telecommunications and information theory
Testing
Vectors (mathematics)
Video coding
Video compression
Video coding
hypothetical reference decoder (HRD)
Videocommunication
Flow rate regulation
Rate distortion theory
rate control
Decoding
H.264/AVC
Algorithm
rate-distortion optimization (RDO)
Optimization
ISSN:1051-8215, 1558-2205
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Shrnutí:In this paper, an efficient rate-control scheme for H.264/AVC video encoding is proposed. The redesign of the quantization scheme in H.264/AVC results in that the relationship between the quantization parameter and the true quantization stepsize is no longer linear. Based on this observation, we propose a new rate-distortion (R-D) model by utilizing the true quantization stepsize and then develop an improved rate-control scheme for the H.264/AVC encoder based on this new R-D model. In general, the current R-D optimization (RDO) mode-selection scheme in H.264/AVC test model is difficult for rate control, because rate control usually requires a predetermined set of motion vectors and coding modes to select the quantization parameter, whereas the RDO does in the different order and requires a predetermined quantization parameter to select motion vectors and coding modes. To tackle this problem, we develop a complexity-adjustable rate-control scheme based on the proposed R-D model. Briefly, the proposed scheme is a one-pass process at frame level and a partial two-pass process at macroblock level. Since the number of macroblocks with the two-pass processing can be controlled by an encoder parameter, the fully one-pass implementation is a subset of the proposed algorithm. An additional topic discussed in this paper is about video buffering. Since a hypothetical reference decoder (HRD) has been defined in H.264/AVC to guarantee that the buffers never overflow or underflow, the more accurate rate-allocation schemes are proposed to satisfy these requirements of HRD.
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ISSN:1051-8215
1558-2205
DOI:10.1109/TCSVT.2005.857300