Title :
Macroblock-level rate control based on the linear RD model for H.264/AVC
Author :
Pastuszak, Grzegorz ; Pietrasiewicz, Andrzej
Author_Institution :
Inst. of Radioelectron., Warsaw Univ. of Technol., Warsaw, Poland
Abstract :
The stability of the bit-rate is a desirable feature of compression systems. The paper presents the video rate control algorithm based on the linear model in the so-called ρ domain. To increase the compression rate accuracy, Quantization Parameter is selected after coding of a specified number of macroblocks. Moreover, the model is updated to correspond to the part of the frame remaining to be coded. The rate control algorithm is implemented in the H.264/AVC JM11 reference model. Testing results prove that the video encoder achieves a better stability of the bit-rate and higher quality compared to the original G12 algorithm applied in the JM11 software.
Keywords :
data compression; quantisation (signal); rate distortion theory; stability; video coding; G12 algorithm; H.264/AVC JM11 reference model; bit-rate stability; linear RD model; macroblock-level rate control; quantization parameter; video compression systems; video encoder; video rate control algorithm; Adaptation models; Encoding; PSNR; Quantization; Software algorithms; Stability analysis; Streaming media;
Conference_Titel :
Signal Processing Algorithms, Architectures, Arrangements, and Applications (SPA), 2008
Conference_Location :
Poznan
Print_ISBN :
978-1-4577-1660-7
Electronic_ISBN :
978-83-62065-05-9
