首页> 外国专利> AUDIO SIGNAL ENCODING METHOD, AUDIO SIGNAL DECODING METHOD, TRANSMITTER, RECEIVER, AND WIRELESS MICROPHONE SYSTEM

AUDIO SIGNAL ENCODING METHOD, AUDIO SIGNAL DECODING METHOD, TRANSMITTER, RECEIVER, AND WIRELESS MICROPHONE SYSTEM

机译:音频信号编码方法,音频信号解码方法,发送器,接收器和无线麦克风系统

摘要

It is an object of the present invention to provide an audio signal encoding method, an audio signal decoding method, a transmitter, a receiver, and a wireless microphone system which can compress an audio signal at a relatively high compression ratio at a relatively high quality with a relatively low delay. The compression encoder 4 of the transmitter includes an audio signal dividing filter bank 4a for dividing the audio signal into four sub-band signals, sampling each of the sub-band signals at a down-sampling rate depending on the number of the sub-band signals, and producing the sub-band signals sampled at the down-sampling rate, LD-CELP encoders 20a to 20d for encoding the sub-band signals on the basis of LD-CELP algorithm, and a multiplexer 4c for producing a multiplexed data stream with the encoded sub-band signals.
机译:本发明的一个目的是提供一种音频信号编码方法,一种音频信号解码方法,一种发送器,一种接收器以及一种无线麦克风系统,它们可以以相对较高的压缩率以相对较高的质量来压缩音频信号。具有相对较低的延迟。发射机的压缩编码器 4 包括音频信号划分滤波器组 4 a ,用于将音频信号划分为四个子带信号,进行采样LD-CELP编码器 20 取决于子带信号的数量,每个子带信号均以下采样率进行下采样,并产生以下采样率采样的子带信号> a 20 d ,用于基于LD-CELP算法对子带信号进行编码,以及复用器 4 / B> c 用于产生具有编码子带信号的多路复用数据流。

著录项

  • 公开/公告号US2009024395A1

    专利类型

  • 公开/公告日2009-01-22

    原文格式PDF

  • 申请/专利权人 YUTAKA BANBA;

    申请/专利号US20060597215

  • 发明设计人 YUTAKA BANBA;

    申请日2005-01-18

  • 分类号G10L19;

  • 国家 US

  • 入库时间 2022-08-21 19:32:04

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