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    • 78. 发明授权
    • Method and apparatus for detecting bad data packets received by a mobile telephone using decoded speech parameters
    • 用于使用解码的语音参数来检测由移动电话接收的不良数据分组的方法和装置
    • US07788092B2
    • 2010-08-31
    • US11622608
    • 2007-01-12
    • Paul E. JacobsAndrew P. Dejaco
    • Paul E. JacobsAndrew P. Dejaco
    • G10L21/02
    • G10L19/005
    • A speech signal is decoded by a vocoder and the reconstructed speech samples are provided to a decoded frame check unit. The decoded frame check unit examines the energy of the reconstructed speech and compares the energy of the reconstructed speech to a range of acceptable energy values. If the energy is not within the range of energy values, a frame erasure is declared and the decoded frame is prevented from being to the speaker in the telephone. In the exemplary implementation, the speech is reconstructed by a vocoder which includes a postfilter which in turn includes automatic gain control. The automatic gain control element of a post filter includes a means for measuring the energy of the decoded speech data. This measured energy is used by the decoded frame check unit to decide whether to provide the decoded data to the user or to declare a frame erasure. This implementation reduces the amount of additional hardware necessary to implement the present invention.
    • 语音信号由声码器解码,并且将重构的语音样本提供给解码帧校验单元。 解码帧检查单元检查重构语音的能量,并将重构语音的能量与可接受的能量值的范围进行比较。 如果能量不在能量值的范围内,则声明帧擦除,并且防止解码的帧被发送到电话中的扬声器。 在示例性实现中,语音由包括后置滤波器的声码器重构,后置滤波器又包括自动增益控制。 后置滤波器的自动增益控制元件包括用于测量解码语音数据的能量的装置。 被测量的能量由解码帧检查单元使用以决定是否向用户提供解码的数据或者声明帧擦除。 该实现减少了实现本发明所需的附加硬件的数量。