Paper Info
Title
Rate control for H.264 with two-step quantization parameter determination but single-pass encoding
Abstract
We present an efficient rate control strategy for H.264 in order to maximize the video quality by appropriately determining the quantization parameter (QP) for each macroblock. To break the chicken-and-egg dilemma resulting from QP-dependent rate-distortion optimization (RDO) in H.264, a preanalysis phase is conducted to gain the necessary source information, and then the coarse QP is decided for rate-distortion (RD) estimation. After motion estimation, we further refine the QP of each mode using the obtained actual standard deviation of motion-compensated residues. In the encoding process, RDO only performs once for each macroblock, thus one-pass, while QP determination is conducted twice. Therefore, the increase of computational complexity is small compared to that of the JM 9.3 software. Experimental results indicate that our rate control scheme with two-step QP determination but single-pass encoding not only effectively improves the average PSNR but also controls the target bit rates well.
Year
DOI
Venue
2006
10.1155/ASP/2006/63409
EURASIP J. Adv. Sig. Proc.
Keywords
Field
DocType
coarse qp,two-step qp determination,encoding process,single-pass encoding,rate control scheme,motion estimation,actual standard deviation,qp determination,efficient rate control strategy,two-step quantization parameter determination,qp-dependent rate-distortion optimization,target bit rate
Macroblock,Computer vision,Code rate,Signal-to-noise ratio,Motion compensation,Algorithm,Artificial intelligence,Motion estimation,Quantization (signal processing),Video quality,Rate–distortion theory,Mathematics
Journal
Volume
Issue
ISSN
2006,
1
1687-6180
Citations 
PageRank 
References 
5
0.55
11
Authors
3
Name
Order
Citations
PageRank
Xiaokang Yang13581238.09
Yongmin Tan21697.58
Nam Ling361275.02