发明名称 Encoding system and decoding system for audio signals including pulse quantization
摘要 An encoding system is disclosed, which includes an input terminal for receiving an input signal, a signal converting portion for converting the input signal into frequency-domain signals and grouping several frequency-domain signals into blocks, an analyzing portion for analyzing the input signal and the frequency-domain signals and obtaining an allowable error, a selecting portion for selecting one of a plurality of quantizing portions that quantizes frequency-domain signals of each block corresponding to the allowable error, a plurality of quantizing portions for quantizing frequency-domain signals corresponding to selection information and calculating amplitude information and codes, at least one pulse quantizing portion for encoding only part of the frequency domain signals, a multiplexing portion for multiplexing the amplitude information, codes, and selection information, and an output terminal for outputting the multiplexed signal.
申请公布号 US5875424(A) 申请公布日期 1999.02.23
申请号 US19970780970 申请日期 1997.01.09
申请人 NEC CORPORATION 发明人 IWADARE, MASAHIRO;TAKAMIZAWA, YUICHIRO
分类号 H03M7/30;G10L19/02;H04B1/66;(IPC1-7):G10L5/00 主分类号 H03M7/30
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