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    • 1. 发明申请
    • Speech encoding
    • 语音编码
    • US20110077940A1
    • 2011-03-31
    • US12586915
    • 2009-09-29
    • Koen Bernard VosSoren Skak Jensen
    • Koen Bernard VosSoren Skak Jensen
    • G10L19/00
    • G10L19/005G10L19/24
    • A method system and program for encoding and decoding a speech signal including error correction data. The method comprises: receiving a speech signal comprising successive frames, for each of a plurality of frames of the speech signal, analysing the speech signal to determine side information and a residual signal, encoding the residual signal at a first bit rate, and generating an output bitstream based on the residual signal encoded at the first bit rate, and for at least one of the plurality of frames of the speech signal, encoding the residual signal at a second bit rate that is lower than the first bit rate; and generating error correction data based on the residual signal encoded at the second bit rate.
    • 一种用于对包括纠错数据的语音信号进行编码和解码的方法系统和程序。 该方法包括:对于语音信号的多个帧中的每一个,接收包括连续帧的语音信号,分析语音信号以确定侧信息和残差信号,以第一比特率编码残差信号,并生成 基于以第一比特率编码的残留信号的输出比特流,以及对于语音信号的多个帧中的至少一个,以低于第一比特率的第二比特率对残留信号进行编码; 以及基于以第二比特率编码的残差信号产生纠错数据。
    • 2. 发明申请
    • Speech coding
    • 语音编码
    • US20100174537A1
    • 2010-07-08
    • US12455478
    • 2009-06-02
    • Koen Bernard VosSoren Skak Jensen
    • Koen Bernard VosSoren Skak Jensen
    • G10L19/14G10L21/02
    • G10L19/12G10L19/09
    • A method, system and computer program for encoding speech according to a source-filter model. The method comprises deriving a spectral envelope signal representative of a modelled filter and a first remaining signal representative of a modelled source signal, and deriving a second remaining signal from the first remaining signal by, at intervals during the encoding: exploiting a correlation between approximately periodic portions in the first remaining signal to generate a predicted version of a later portion from a stored version of an earlier portion, and using the predicted-version of the later portion to remove an effect of said periodicity from the first remaining signal. The method further comprises, once every number of intervals, transforming the stored version of the earlier portion of the first remaining signal prior to generating the predicted version of the respective later portion.
    • 一种根据源滤波器模型对语音进行编码的方法,系统和计算机程序。 该方法包括导出代表建模过滤器的频谱包络信号和表示建模源信号的第一剩余信号,以及在编码期间间隔从第一剩余信号导出第二剩余信号:利用近似周期性的相关性 第一剩余信号中的部分,以从早期部分的存储版本生成稍后部分的预测版本,并​​且使用后面部分的预测版本来从第一剩余信号中去除所述周期性的影响。 该方法还包括:每产生一次间隔之后,在生成相应较后部分的预测版本之前变换第一剩余信号的较早部分的存储版本。
    • 7. 发明授权
    • Predictive speech signal coding
    • 预测语音信号编码
    • US08433563B2
    • 2013-04-30
    • US12455478
    • 2009-06-02
    • Koen Bernard VosSoren Skak Jensen
    • Koen Bernard VosSoren Skak Jensen
    • G10L19/04G10L19/08
    • G10L19/12G10L19/09
    • A method, system and computer program for encoding speech according to a source-filter model. The method comprises deriving a spectral envelope signal representative of a modelled filter and a first remaining signal representative of a modelled source signal, and deriving a second remaining signal from the first remaining signal by, at intervals during the encoding: exploiting a correlation between approximately periodic portions in the first remaining signal to generate a predicted version of a later portion from a stored version of an earlier portion, and using the predicted-version of the later portion to remove an effect of said periodicity from the first remaining signal. The method further comprises, once every number of intervals, transforming the stored version of the earlier portion of the first remaining signal prior to generating the predicted version of the respective later portion.
    • 一种根据源滤波器模型对语音进行编码的方法,系统和计算机程序。 该方法包括导出代表建模过滤器的频谱包络信号和表示建模源信号的第一剩余信号,以及在编码期间间隔从第一剩余信号导出第二剩余信号:利用近似周期性的相关性 第一剩余信号中的部分,以从早期部分的存储版本生成稍后部分的预测版本,并​​且使用后面部分的预测版本来从第一剩余信号中去除所述周期性的影响。 该方法还包括:每产生一次间隔之后,在生成相应较后部分的预测版本之前变换第一剩余信号的较早部分的存储版本。
    • 8. 发明申请
    • Encoding and decoding speech signals
    • 编码和解码语音信号
    • US20110137660A1
    • 2011-06-09
    • US12803271
    • 2010-06-23
    • Stefan StrommerKarsten Vandborg SorensenSoren Skak JensenKoen VosJon Bergenheim
    • Stefan StrommerKarsten Vandborg SorensenSoren Skak JensenKoen VosJon Bergenheim
    • G10L21/00
    • G10L19/26G10L19/24G10L21/0364
    • A method and apparatus for transmitting an audio signal over a communication channel comprising encoding the audio signal with an encoder 204 using a first sampling rate, filtering the audio signal using a first cut off frequency, the first cut off frequency being chosen in dependence upon the first sampling rate, and transmitting the encoded and filtered audio signal over the communication channel. The presence of a condition in which the sampling rate of the encoder 204 is to be switched to a second sampling rate at a switching time is determined and if the condition has been determined to be present, the cut off frequency used in the filtering step is gradually changed from the first cut off frequency to a second cut off frequency, the second cut off frequency being chosen in dependence upon the second sampling rate, such that the audio bandwidth of the transmitted signal changes gradually when the sampling rate is switched to the second sampling rate.
    • 一种用于通过通信信道发送音频信号的方法和装置,包括使用第一采样率对编码器204对音频信号进行编码,使用第一截止频率对音频信号进行滤波,第一截止频率根据 第一采样率,并且通过通信信道发送编码和滤波的音频信号。 确定在切换时刻将编码器204的采样率切换到第二采样率的条件的存在,如果已经确定存在条件,则在滤波步骤中使用的截止频率为 从第一截止频率逐渐变化到第二截止频率,根据第二采样率选择第二截止频率,使得当采样速率切换到第二截止频率时,发送信号的音频带宽逐渐变化 采样率。