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公开(公告)号：DE69938049T2
公开(公告)日：2009-02-26
申请号：DE69938049
申请日：1999-08-17
Applicant: MOTOROLA INC
Inventor： BROPHY JOHN DOUGLAS , ASHLEY JAMES PATRICK , PROCTOR LEE MICHAEL , MARTINOVICH KRSMAN
Abstract: Vocoder bypass is provided using in-band signaling. In preferred embodiments of the present invention, three signaling channels are arranged for transmission within the compressed speech. Each of the signaling channels are communicated at a preferred rate to permit fast, reliable detection of conditions indicating vocoder bypass mode of operation, to negotiate suitable vocoder type if necessary, and to synchronize and communicate compressed speech in a vocoder bypass mode of operation.
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公开(公告)号：DE69935989D1
公开(公告)日：2007-06-14
申请号：DE69935989
申请日：1999-07-23
Applicant: MOTOROLA INC
Inventor： BROPHY JOHN DOUGLAS , ASHLEY JAMES PATRICK , PROCTOR LEE MICHAEL
Abstract: Vocoder bypass is provided using in-band signaling. In preferred embodiments of the present invention, three signaling channels are arranged for transmission within the compressed speech. Each of the signaling channels are communicated at a preferred rate to permit fast, reliable detection of conditions indicating vocoder bypass mode of operation, to negotiate suitable vocoder type if necessary, and to synchronize and communicate compressed speech in a vocoder bypass mode of operation.
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公开(公告)号：FI116994B
公开(公告)日：2006-04-28
申请号：FI20012064
申请日：2001-10-24
Applicant: MOTOROLA INC
Inventor： HETHERINGTON MARK , PROCTOR LEE MICHAEL
Abstract: In a data transmitter having a data encoder, an encoder mode is detected. Thereafter, an excluded codeword output by the encoder operating in the encoder mode is identified. Next, a selected bit in the excluded codeword caused to have a predetermined value to produce a non-excluded codeword. Finally, the excluded codeword is substituted with the non-excluded codeword, wherein the non-excluded codeword is selected to mitigate effects of a decoding error in a receiver associated with the excluded codeword.
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公开(公告)号：FI20012064A
公开(公告)日：2001-10-24
申请号：FI20012064
申请日：2001-10-24
Applicant: MOTOROLA INC
Inventor： HETHERINGTON MARK , PROCTOR LEE MICHAEL
Abstract: In a data transmitter having a data encoder, an encoder mode is detected. Thereafter, an excluded codeword output by the encoder operating in the encoder mode is identified. Next, a selected bit in the excluded codeword caused to have a predetermined value to produce a non-excluded codeword. Finally, the excluded codeword is substituted with the non-excluded codeword, wherein the non-excluded codeword is selected to mitigate effects of a decoding error in a receiver associated with the excluded codeword.
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公开(公告)号：BR9913197A
公开(公告)日：2001-10-02
申请号：BR9913197
申请日：1999-08-17
Applicant: MOTOROLA INC
Inventor： BROPHY JOHN DOUGLAS , ASHLEY JAMES PATRICK , PROCTOR LEE MICHAEL , MARTINOVICH KRSMAN
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Patent Agency Ranking
公开(公告)号：AU4339701A
公开(公告)日：2001-09-17
申请号：AU4339701
申请日：2001-03-02
Applicant: MOTOROLA INC
Inventor： HETHERINGTON MARK , PROCTOR LEE MICHAEL
Abstract: In a data transmitter having a data encoder, an encoder mode is detected. Thereafter, an excluded codeword output by the encoder operating in the encoder mode is identified. Next, a selected bit in the excluded codeword caused to have a predetermined value to produce a non-excluded codeword. Finally, the excluded codeword is substituted with the non-excluded codeword, wherein the non-excluded codeword is selected to mitigate effects of a decoding error in a receiver associated with the excluded codeword.
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公开(公告)号：CA2167940C
公开(公告)日：2001-04-03
申请号：CA2167940
申请日：1995-05-26
Applicant: MOTOROLA INC
Inventor： ASHLEY JAMES PATRICK , PROCTOR LEE MICHAEL
Abstract: A method and apparatus are provided for echo canceling which includes double-talk immunity. The echo canceller (15) according to the present invention includes a double-talk detector (17) which uses an adaptive double - talk detection threshold (214) and an accurate estimation of reference energ y (106) to detect double-talk. The echo canceller further provides for correct ing partial echo canceller adaptive filter vector divergence occurring prior to double- talk detection by maintaining and switching to an auxiliary echo canceller f ilter with known "good" filter coefficients (58, 60, 62).
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公开(公告)号：GB2305338A
公开(公告)日：1997-04-02
申请号：GB9625745
申请日：1996-03-06
Applicant: MOTOROLA INC
Abstract: A method and system for time aligning a frame (60) in a communication network (10) involves the steps of: i) determining if a frame needs to be advanced at a BTS (14), and ii) sending a shortened synchronization pattern from the BSC (12). The BTS (14) then determines if a short or long synchronization pattern has been sent by determining (256) if the received data stream matches a long synchronization pattern and setting a first flag when they do match. If the received data stream does not match the long synchronization pattern and the first flag is set (264), the data stream is compared (266) to the short synchronization pattern. When they match a second flag is set (268).
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