Abstract
Bit rate control has been proved to be an important technique used to transmit the variable rate bit stream over a fixed rate channel in MPEG coding. In this paper, a hybrid algorithm is proposed to achieve the rate control and obtain a good picture quality. In the picture layer, the algorithm estimates numbers of bits required for different type of frames. In the macroblock layer, it utilizes the predictive and adaptive perceptual techniques in the regulation of the quantization scale to allocate the target bits. In the upper and left boundary of the picture, the macroblocks are quantized with the perceptual basis to adjust the quantization scale and in the other part of the picture a predictive method is used to update the quantization scale. By using the proposed scheme, the distortion of coding is uniformly distributed in the picture layer as well as in the macroblock layer and better bit rate control is achieved.
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Lin, YS., Liu, TS. & Chang, LW. A New Bit Rate Control of MPEG with Predictive and Adaptive Perceptual Quantization. Multidimensional Systems and Signal Processing 8, 295–313 (1997). https://doi.org/10.1023/A:1008261712258
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DOI: https://doi.org/10.1023/A:1008261712258