新一代视频压缩标准H.264中采用了统一变长编码(UVLC)。该文分析了几种在统一变长编码基础上的工作之后,提出了一种新的变长编码方法,并对其进行了测试。实验结果表明:在基本相同的峰值信噪比(PSNR)下,采用新的变长编码方法后的码率比标准编码方法节省了3.1%~11.7%。
Universal variable length coding(UVLC)is adopted in the newly proposed video compression standard H.264. Based on the analysis of current works of UVLC,a new variable length coding method is proposed.Experimental results indicate that the new variable length coding method can save about 3.1%~11.7% bit-rate compared with that of standard UVLC adopted in H.264 under the same PSNR.