发明授权
US5884268A Method and apparatus for reducing artifacts that result from time
compressing and decompressing speech
失效
用于减少由时间压缩和解压缩语音产生的伪像的方法和装置
- 专利标题： Method and apparatus for reducing artifacts that result from time compressing and decompressing speech
- 专利标题（中）： 用于减少由时间压缩和解压缩语音产生的伪像的方法和装置
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申请号： US883977申请日： 1997-06-27
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公开(公告)号： US5884268A公开(公告)日： 1999-03-16
- 发明人: William Michael Campbell , Clifford Allan Wood , James Earl Womack , Wade Alan Bastien , Deborah Ann Calie , Robert Andrew Rapp , Terence Edward Sumner
- 申请人： William Michael Campbell , Clifford Allan Wood , James Earl Womack , Wade Alan Bastien , Deborah Ann Calie , Robert Andrew Rapp , Terence Edward Sumner
- 申请人地址： IL Schaumburg
- 专利权人： Motorola, Inc.
- 当前专利权人： Motorola, Inc.
- 当前专利权人地址： IL Schaumburg
- 主分类号： G10L19/00
- IPC分类号： G10L19/00 ; G10L19/02 ; G10L3/02
摘要：
A processing system time compresses a voice message before transmission, and processing system time expands the message after reception. To process the message the processing systems perform at least one of: (a) randomizing the order of a sequence of samples form a silent portion of the message after reception thereof before blending the sequence with a last portion of the expanded message; (b) selecting the sequence of samples from the silent portion of the message after reception thereof, the sequence selected being poorly correlated with the last portion of the expanded message, before blending the sequence with the last portion of the message; and (c) compressing the dynamic range of the message before transmission, by an amount dependent upon the signal-to-noise ratio of the message, and aggressively expanding the dynamic range of the message after reception, by a fixed amount.
公开/授权文献
- US5334991A Dual image head-mounted display 公开/授权日：1994-08-02
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