公开(公告)号：DE69938049D1

公开(公告)日：2008-03-13

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

IPC: G10L19/00 ,  H04B7/26 ,  H04M1/00 ,  H04M3/00 ,  H04M7/00 ,  H04Q11/04 ,  H04W88/18

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.

公开(公告)号：AU2002360504A1

公开(公告)日：2003-07-09

申请号：AU2002360504

申请日：2002-11-21

Applicant: MOTOROLA INC

Inventor： MITTAL UDAR ,  CRUZ-ZENO EDGARDO MANUEL ,  ASHLEY JAMES PATRICK

IPC: G06T9/00 ,  G10L19/10 ,  G10L19/14 ,  H04N5/95 ,  G10L19/04 ,  G10L19/12

Abstract: The invention provides a method of coding an information signal. An information signal is represented by a sequence of pulses. A plurality of pulse parameters are determined based on the sequence of pulses including a non-zero pulse parameter corresponding to a number of non-zero pulse positions in the sequence of pulses. The non-zero pulse parameter is coded using a variable-length codeword.

公开(公告)号：BR9902603A

公开(公告)日：2000-01-18

申请号：BR9902603

申请日：1999-05-27

Applicant: MOTOROLA INC

Inventor： ASHLEY JAMES PATRICK ,  PENG WEIMING

IPC: G10L19/00 ,  G10L25/93 ,  H03M13/00

Abstract: Bits are allocated to short-term repetition information for unvoiced input signals. Stated differently, more bits are allocated for pitch information during unvoiced input speech than in the prior art. The improved method and apparatus in an encoder (300) and decoder (700) result in improved consistency of amplitude pulses compared to prior art methods which indicates improved stability due to increased search resolution. Also, the improved method and apparatus result in higher energy compared to prior art methods which indicates that the synthesized waveform matches the target waveform more closely, resulting in a higher fixed codebook (FCB) gain.

公开(公告)号：BR9606292A

公开(公告)日：1997-11-18

申请号：BR9606292

申请日：1996-03-07

Applicant: MOTOROLA INC

Inventor： ASHLEY JAMES PATRICK ,  PENG WEIMIN ,  ZHANG PENG

IPC: G10L19/038 ,  H03M7/30 ,  G10L9/18

公开(公告)号：AU683058B2

公开(公告)日：1997-10-30

申请号：AU6634996

申请日：1996-03-07

Applicant: MOTOROLA INC

Inventor： ASHLEY JAMES PATRICK ,  PENG WEIMIN ,  ZHANG PENG

IPC: G10L19/038 ,  H03M7/30 ,  G10L9/18

公开(公告)号：CA2247427A1

公开(公告)日：1997-10-02

申请号：CA2247427

申请日：1997-01-24

Applicant: MOTOROLA INC

Inventor： PROCTOR LEE MICHAEL ,  ASHLEY JAMES PATRICK

IPC: H04L12/18 ,  H04B7/26 ,  H04M3/56 ,  H04Q11/00 ,  H04W4/00 ,  H04Q7/20

Abstract: An apparatus (200) for providing a multi-party speech connection for use in a wireless communication system (10). The apparatus (200) comprises a first speech encoder (202) producing a first encoded speech signal, a second speech encoder (20) producing a second encoded speech signal, a conference circuit (22), and a speech decoder (208) responsive to the conference circuit (22). The conference circuit (22) receives the first and second speech encoded signals and produces a multiplexed encoded speech signal. The speech decoder (208) receives the multiplexed encoded speech signal and produces a decoded speech signal.

公开(公告)号：BR9506310A

公开(公告)日：1997-08-05

申请号：BR9506310

申请日：1995-02-16

Applicant: MOTOROLA INC

Inventor： PROCTER LEE MICHAEL ,  ASHLEY JAMES PATRICK

IPC: H04J3/16 ,  H04W76/00 ,  H04J13/00

Abstract: Signaling is inserted (102) into a communication channel of a communication system by inserting the signaling into the communication channel if the communication channel has sufficient available bandwidth (104). If the communication channel does not have sufficient available bandwidth, reducing the bandwidth of information being communicated on the communication channel (106) and inserting the signaling into the communication channel (108) with reduced information bandwidth.

公开(公告)号：GB2304508A

公开(公告)日：1997-03-19

申请号：GB9625742

申请日：1996-03-07

Applicant: MOTOROLA INC

Inventor： ASHLEY JAMES PATRICK ,  PENG WEIMIN ,  ZHANG PENG

IPC: G10L19/038 ,  H03M7/30 ,  G10L9/18

Abstract: A system for low rate coding or decoding includes the use of a mode indicator in the coded signal to indicate whether prequantizer (i.e., coarse) or quantizer (i.e., fine) information is being sent. In a transmitter (300) embodiment both a prequantizer (212) and a restricted quantizer (214) search is performed of predefined prequantizer ("P") and quantizer ("V") codewords, respectively, to determine the codewords with the least residual energy. The index of the P or V codeword with the least residual is then determined (220), and this index is transmitted along with an appropriate P or V mode indicator. In a receiver (330) embodiment, the mode indicator is used to set the decoder (e.g., a vocoder) (350) to form a signal replica from a P codeword (determined from the transmitted index), or from a V codeword (from the transmitted V index) and previously determined P codeword (e.g., the centroid of the V codeword).

公开(公告)号：FI965131A

公开(公告)日：1996-12-19

申请号：FI965131

申请日：1996-12-19

Applicant: MOTOROLA INC

Inventor： ASHLEY JAMES PATRICK ,  PENG WEIMIN ,  ZHANG PENG

IPC: G10L19/038 ,  H03M7/30 ,  G10L

公开(公告)号：CA2191972A1

公开(公告)日：1996-10-31

申请号：CA2191972

申请日：1996-03-07

Applicant: MOTOROLA INC

Inventor： ASHLEY JAMES PATRICK ,  PENG WEIMIN ,  ZHANG PENG

IPC: G10L19/038 ,  H03M7/30 ,  G10L9/14

Abstract: A system for low rate coding or decoding includes the use of a mode indicator in the coded signal to indicate whether prequantizer (i.e., coarse) or quantizer (i.e., fine) information is being sent. In a transmitter (300) embodiment both a prequantizer (212) and a restricted quantizer (214) search is performed of predefined prequantizer ("P") and quantizer ("V") codewords, respectively, to determine the codewords with the least residual energy. The index of the P or V codeword with the least residual is then determined (220), and this index is transmitted along with an appropriate P or V mode indicator. In a receiver (330) embodiment, the mode indicator is used to set the decoder (e.g., a vocoder) (350) to form a signal replica from a P codeword (determined from the transmitted index), or from a V codeword (from the transmitted V index) and previously determined P codeword (e.g., the centroid of the V codeword).