Encoding method and apparatus for bit compressing digital audio

Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing

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369 47, 369124, 360 48, 360 53, 358426, 395 238, 395 239, G11B 700

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055901085

ABSTRACT:
A method for encoding audio signals includes dividing input audio signals into a two-dimensional block of time and frequency and quantizing the two-dimensional blocks based upon bit allocation as determined for each of the two-dimensional blocks. Scale factors are calculated indicating characteristics of signal components for each of the plural two-dimensional blocks, and bit allocations are determined for a pre-set one of the two-dimensional blocks based upon the scale factor of the pre-set two-dimensional block and plural scale factors of plural ones of the two-dimensional blocks neighboring to said pre-set two-dimensional block on the frequency axis.

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