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公开(公告)号：ZA9503557B
公开(公告)日：1996-01-25
申请号：ZA9503557
申请日：1995-05-03
Applicant: MOTOROLA INC
Inventor： LEITCH CLIFFORD DANA
CPC classification number: H04H20/67 , H03M13/2703 , H04W88/187
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公开(公告)号：GB2120031A
公开(公告)日：1983-11-23
申请号：GB8308465
申请日：1983-03-28
Applicant: MOTOROLA INC
Inventor： LEITCH CLIFFORD DANA
Abstract: A signal processing circuit amplifies low level modulated radio frequency signals in an efficient manner which minimizes the amount of undesired splatter components generated. The envelope of the signal is derived from envelope detector 120 and clipped (130) when below a set threshold (Fig. 4c). During this dipped interval, the other channel (150,160, 170) amplifies the input signal linearly: during the non-clipped interval the channel (150,160,170) operates in e.g. class C mode. The output signal is obtained from modulating one channel with the other in modulator 180.
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33.发明公开A COMMUNICATION SYSTEM AND METHOD USING A SPEAKER DEPENDENT TIME-SCALING TECHNIQUE 失效说话者依赖时间尺度新新闻传输系统和方法
公开(公告)号：EP0870299A4
公开(公告)日：1999-02-10
申请号：EP96903611
申请日：1996-01-26
Applicant: MOTOROLA INC
Inventor： SATYAMURTI SUNIL , LEITCH CLIFFORD DANA , SCHWENDEMAN ROBERT JOHN , SIWIAK KAZIMIERZ , KUZNICKI WILLIAM JOSEPH
Abstract: A method for time-scale modification of speech using a modified version of the Waveform Similarity based Overlap-Add technique (WSOLA) comprises the steps of storing a portion of an input speech signal in a memory, analysing the portion of the input speech signal providing an estimated pitch value (12), determining a segment size (14) in response to the estimated pitch value and time-scaling (18) the input speech signal for a given time-scaling factor and in response to the determined segment size.
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公开(公告)号：EP0572376A4
公开(公告)日：1992-10-03
申请号：EP90911006
申请日：1990-07-09
Applicant: MOTOROLA INC
Inventor： LEITCH CLIFFORD DANA
CPC classification number: H04L25/03834
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