PID-based bit allocation strategy for asymmetric stereoscopic video coding with fuzzy quality controller |
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| Authors: | ,
Hou Yonghong
,
Gao Zhimin
,
Wang Pichao
,
Hou Chunping |
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| Institution: | School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | Asymmetric stereoscopic video coding can take advantage of binocular suppression in human vision by representing one of the two views in lower quality. This paper proposes a bit allocation strategy for asymmetric stereoscopic video coding. In order to improve the accuracy of bit allocation and rate control in the left view, a proportionalintegral-derivative controller is adopted. Meanwhile, to control the quality fluctuation between consecutive frames of the left view, a quality controller is adopted. Besides, a fuzzy controller is proposed to control the variation in quality between the left and right views by comparing the PSNR disparity of two views with a fixed threshold, which is used to quantize the binocular psycho-visual redundancy and adjust the quantization parameter (QP) of the right view correspondingly. The proposed algorithm has been implemented in H.264/AVC video codec, and the experimental results show its effectiveness in rate control while keeping a good quality for the left view, and fewer bits are allocated for the right view so that the overall bit rate is saved by 7.2% at most without the loss of subjective visual quality for stereoscopic video. |
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| Keywords: | stereoscopic video bit allocation proportional-integral-derivative (PID) controller fuzzy controller asymmetric coding |
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