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    • 1. 发明申请
    • A SYSTEM AND METHOD FOR COMPRESSION AND DECOMPRESSION OF AUDIO SIGNALS
    • 用于音频信号的压缩和分解的系统和方法
    • WO1995015549A1
    • 1995-06-08
    • PCT/US1994013288
    • 1994-12-01
    • DSP GROUP, INC.
    • DSP GROUP, INC.BIALIK, Leon
    • G10L03/02
    • G10L19/10G10L19/09
    • A speech compression/decompression system and method which do not require special hardware are described. The compression unit represents an input audio signal (19) as a collection of parameters, wherein the parameters are a remnant excitation pulse sequence (27), a set of spectral coefficients (A) and a set of pitch parameters (B & C). The decompression unit utilizes the pitch parameters and remnant excitation pulse sequence to produce a reconstructed excitation signal. The decompression unit also utilizes the spectral coefficients to filter the reconstructed excitation signal into a speech waveform. The compression unit includes a short-term predictor (22), a two-step long-term predictor (24) and a multipulse analyzer (26).
    • 描述不需要特殊硬件的语音压缩/解压缩系统和方法。 压缩单元表示作为参数集合的输入音频信号(19),其中参数是剩余激励脉冲序列(27),一组频谱系数(A)和一组音调参数(B&C)。 减压单元利用音调参数和剩余激励脉冲序列产生重建的激励信号。 解压缩单元还利用频谱系数将重构的激励信号滤波成语音波形。 压缩单元包括短期预测器(22),两步长期预测器(24)和多脉冲分析器(26)。