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As a significant perceptual audio coding standard, AC-3 has been widely applied in such areas as DTV and etc. The bit allocation module in AC-3 encoder plays a decisive role to the quality of the whole audio encoder. In this paper, based on the quantitative analysis of the SNRoffset, the theory deduction is provided, and formula to estimate the relation between the volume of bit allocation and the...
The Audio and Video Coding Standard of China (AVS) uses multi-resolution analysis of frequency domain (MRAFD) to control pre-echo when coding transient signal. However, this technology complicates the implementation of encoder as well as decoders with more operation and higher computational precision. In this paper, a kind of gain control of time domain is used to encode transient signal instead of...
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