Analysis filterbank, synthesis filterbank, encoder, de-coder, mixer and conferencing system
    1.
    发明授权
    Analysis filterbank, synthesis filterbank, encoder, de-coder, mixer and conferencing system 有权
    分析滤波器组,合成滤波器组,编码器,解码器,混频器和会议系统

    公开(公告)号:US08036903B2

    公开(公告)日:2011-10-11

    申请号:US11744641

    申请日:2007-05-04

    IPC分类号: G10L19/00 G10L19/14

    摘要: An embodiment of an analysis filterbank for filtering a plurality of time domain input frames, wherein an input frame comprises a number of ordered input samples, comprises a windower configured to generate a plurality of windowed frames, wherein a windowed frame comprises a plurality of windowed samples, wherein the windower is configured to process the plurality of input frames in an overlapping manner using a sample advance value, wherein the sample advance value is less than the number of ordered input samples of an input frame divided by two, and a time/frequency converter configured to provide an output frame comprising a number of output values, wherein an output frame is a spectral representation of a windowed frame.

    摘要翻译: 一种用于对多个时域输入帧进行滤波的分析滤波器组的实施例,其中输入帧包括多个有序输入样本,包括被配置为生成多个窗口化帧的加窗器,其中,窗口化框架包括多个窗口样本 其中,所述加权器被配置为使用样本提前值以重叠的方式处理所述多个输入帧,其中所述样本提前值小于输入帧除以2的有序输入样本的数量,并且时间/频率 转换器,被配置为提供包括多个输出值的输出帧,其中输出帧是窗口化帧的频谱表示。

    ANALYSIS FILTERBANK, SYNTHESIS FILTERBANK, ENCODER, DE-CODER, MIXER AND CONFERENCING SYSTEM
    2.
    发明申请
    ANALYSIS FILTERBANK, SYNTHESIS FILTERBANK, ENCODER, DE-CODER, MIXER AND CONFERENCING SYSTEM 有权
    分析滤波器,合成滤波器,编码器,解码器,混频器和会议系统

    公开(公告)号:US20080097764A1

    公开(公告)日:2008-04-24

    申请号:US11744641

    申请日:2007-05-04

    IPC分类号: G10L19/00

    摘要: An embodiment of an analysis filterbank for filtering a plurality of time domain input frames, wherein an input frame comprises a number of ordered input samples, comprises a windower configured to generating a plurality of windowed frames, wherein a windowed frame comprises a plurality of windowed samples, wherein the windower is configured to process the plurality of input frames in an overlapping manner using a sample advance value, wherein the sample advance value is less than the number of ordered input samples of an input frame divided by two, and a time/frequency converter configured to providing an output frame comprising a number of output values, wherein an output frame is a spectral representation of a windowed frame.

    摘要翻译: 一种分析滤波器组的实施例,用于对多个时域输入帧进行滤波,其中输入帧包括多个有序输入样本,包括配置成产生多个窗口化帧的加窗器,其中,窗口框架包括多个窗口样本 其中,所述加权器被配置为使用样本提前值以重叠的方式处理所述多个输入帧,其中所述样本提前值小于输入帧除以2的有序输入样本的数量,并且时间/频率 转换器,被配置为提供包括多个输出值的输出帧,其中输出帧是窗口化帧的频谱表示。

    Audio Encoder and Decoder for Encoding and Decoding Frames of a Sampled Audio Signal
    8.
    发明申请
    Audio Encoder and Decoder for Encoding and Decoding Frames of a Sampled Audio Signal 有权
    音频编码器和解码器,用于对采样音频信号的帧进行编码和解码

    公开(公告)号:US20110173011A1

    公开(公告)日:2011-07-14

    申请号:US13004475

    申请日:2011-01-11

    IPC分类号: G10L19/00

    CPC分类号: G10L19/0212 G10L19/04

    摘要: An audio encoder adapted for encoding frames of a sampled audio signal to obtain encoded frames, wherein a frame includes a number of time domain audio samples. The audio encoder includes a predictive coding analysis stage for determining information on coefficients of a synthesis filter and a prediction domain frame based on a frame of audio samples. The audio encoder further includes a time-aliasing introducing transformer for transforming overlapping prediction domain frames to the frequency domain to obtain prediction domain frame spectra, wherein the time-aliasing introducing transformer is adapted for transforming the overlapping prediction domain frames in a critically-sampled way. Moreover, the audio encoder includes a redundancy reducing encoder for encoding the prediction domain frame spectra to obtain the encoded frames based on the coefficients and the encoded prediction domain frame spectra.

    摘要翻译: 一种音频编码器,适于编码采样的音频信号的帧以获得编码的帧,其中帧包括多个时域音频采样。 音频编码器包括用于基于音频样本的帧来确定关于合成滤波器和预测域帧的系数的信息的预测编码分析阶段。 音频编码器还包括时间混叠引入变压器,用于将重叠的预测域帧转换到频域以获得预测域帧频谱,其中时间混叠引入变压器适于以重要取样的方式变换重叠的预测域帧 。 此外,音频编码器包括冗余减少编码器,用于根据系数和编码的预测域帧频谱对预测域帧频谱进行编码以获得编码的帧。

    Audio coder/decoder with predictive coding of synthesis filter and critically-sampled time aliasing of prediction domain frames
    9.
    发明授权
    Audio coder/decoder with predictive coding of synthesis filter and critically-sampled time aliasing of prediction domain frames 有权
    具有合成滤波器的预测编码和预测域帧的临时采样时间混叠的音频编码器/解码器

    公开(公告)号:US08595019B2

    公开(公告)日:2013-11-26

    申请号:US13004475

    申请日:2011-01-11

    IPC分类号: G10L19/00 G10L19/02 G10L19/04

    CPC分类号: G10L19/0212 G10L19/04

    摘要: An audio encoder adapted for encoding frames of a sampled audio signal to obtain encoded frames, wherein a frame includes a number of time domain audio samples. The audio encoder includes a predictive coding analysis stage for determining information on coefficients of a synthesis filter and a prediction domain frame based on a frame of audio samples. The audio encoder further includes a time-aliasing introducing transformer for transforming overlapping prediction domain frames to the frequency domain to obtain prediction domain frame spectra, wherein the time-aliasing introducing transformer is adapted for transforming the overlapping prediction domain frames in a critically-sampled way. Moreover, the audio encoder includes a redundancy reducing encoder for encoding the prediction domain frame spectra to obtain the encoded frames based on the coefficients and the encoded prediction domain frame spectra.

    摘要翻译: 一种音频编码器,适于编码采样的音频信号的帧以获得编码的帧,其中帧包括多个时域音频采样。 音频编码器包括用于基于音频样本的帧来确定关于合成滤波器和预测域帧的系数的信息的预测编码分析阶段。 音频编码器还包括时间混叠引入变压器,用于将重叠的预测域帧转换到频域以获得预测域帧频谱,其中时间混叠引入变压器适于以重要取样的方式变换重叠的预测域帧 。 此外,音频编码器包括冗余减少编码器,用于根据系数和编码的预测域帧频谱对预测域帧频谱进行编码以获得编码的帧。