基于DCT的活度测量在MPEG-2速率控制模型TM5中的应用

Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795) Pub Date : 2003-12-14 DOI:10.1109/ISSPIT.2003.1341210

S. Kibey

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引用次数: 1

摘要

本文对MPEG-2视频编码器的速率控制测试模型5 (TM5)的步骤3进行了新的修改。TM5使用基于方差的活动度量来为每个宏块调整量化参数。结果表明，用DCT系数代替方差，重构图像的PSNR质量提高0.5 ~ 2db。此外，新方法的计算复杂度明显低于TM5。

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On the use of DCT based activity measure in MPEG-2 rate control model TM5

In this paper, a novel modification in the step 3 of the rate control test Model 5 (TM5) of MPEG-2 video encoder is proposed. TM5 uses variance based activity measure to adapt the quantization parameter for each macroblock. It is found that if DCT coefficients are used instead of variance, the PSNR quality of the reconstructed image improves by 0.5 to 2 dB. In addition the computational complexity of the new approach is significantly lesser than that of TM5.

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Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)

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