28.
    发明专利
    未知

    公开(公告)号:AT386321T

    公开(公告)日:2008-03-15

    申请号:AT06013824

    申请日:1995-08-01

    Applicant: QUALCOMM INC

    Abstract: A method of adding hangover frames to a plurality of frames encoded by a vocoder, the method comprising: detecting that a predefined number of successive frames has been encoded at a first rate; determining that a next successive frame should be encoded at a second rate that is less than the first rate; and selecting a number of successive hangover frames beginning with the next successive frame to encode at the first rate, the numbering dependent upon an estimate of a background noise level.

    29.
    发明专利
    未知

    公开(公告)号:FI118103B

    公开(公告)日:2007-06-29

    申请号:FI943538

    申请日:1994-07-27

    Applicant: QUALCOMM INC

    Abstract: A method and system by which parameter data representative of vocoded speech are organized into a data packet for transmission so as to reduce the impact of transmission channel induced errors on the data packet. A data packet is constructed with certain most perceptually significant bits of parameter data at the beginning of the data packet. Following in the data packet are lesser perceptually significant bits of the same parameter data. Other parameter data then follows in the data packet. Interleaved in the data packet following the most perceptually significant bits at the beginning of the data packet are most perceptually significant bits of other parameter data. A parity check code is computed from the most perceptually significant bits in the data packet and also interleaved in the data packet following the most perceptually significant bits at the beginning of the data packet.

    30.
    发明专利
    未知

    公开(公告)号:FI117993B

    公开(公告)日:2007-05-15

    申请号:FI961112

    申请日:1996-03-08

    Applicant: QUALCOMM INC

    Abstract: A method of adding hangover frames to a plurality of frames encoded by a vocoder, the method comprising: detecting that a predefined number of successive frames has been encoded at a first rate; determining that a next successive frame should be encoded at a second rate that is less than the first rate; and selecting a number of successive hangover frames beginning with the next successive frame to encode at the first rate, the numbering dependent upon an estimate of a background noise level.

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