Low bitrate audio encoding/decoding scheme having cascaded switches
    4.
    发明公开
    Low bitrate audio encoding/decoding scheme having cascaded switches 审中-公开
    Audiokodierungs- / Audiodekodierungsschema geringer Bitrate mit kaskadierten Schaltvorrichtungen

    公开(公告)号:EP2144230A1

    公开(公告)日:2010-01-13

    申请号:EP09002271.6

    申请日:2009-02-18

    IPC分类号: G10L19/14

    摘要: An audio encoder comprises a first information sink oriented encoding branch such as a spectral domain encoding branch, a second information source or SNR oriented encoding branch such as an LPC-domain encoding branch, and a switch for switching between the first encoding branch and the second encoding branch, wherein the second encoding branch comprises a converter into a specific domain different from the spectral domain such as an LPC analysis stage generating an excitation signal, and wherein the second encoding branch furthermore comprises a specific domain coding branch such as LPC domain processing branch, and a specific spectral domain coding branch such as LPC spectral domain processing branch, and an additional switch for switching between the specific domain coding branch and the specific spectral domain coding branch. An audio decoder comprises a first domain decoder such as a spectral domain decoding branch, a second domain decoder such as an LPC domain decoding branch for decoding a signal such as an excitation signal in the second domain, and a third domain decoder such as an LPC-spectral decoder branch and two cascaded switches for switching between the decoders.

    摘要翻译: 音频编码器包括:第一信息宿定向编码分支,例如频域编码分支,第二信息源或SNR定向编码分支,诸如LPC域编码分支,以及用于在第一编码分支与第二编码分支之间进行切换的开关 编码分支,其中所述第二编码分支包括转换器到不同于所述频域的特定域,例如产生激励信号的LPC分析阶段,并且其中所述第二编码分支还包括特定域编码分支,诸如LPC域处理分支 ,以及诸如LPC频域处理分支的特定频域编码分支,以及用于在特定编码分支和特定频域编码分支之间切换的附加开关。 音频解码器包括诸如频域解码分支的第一域解码器,用于对诸如第二域中的激励信号的信号进行解码的LPC域解码分支的第二域解码器,以及诸如LPC 光谱解码器分支和两个级联开关,用于在解码器之间切换。

    Audio encoder and decoder for encoding and decoding frames of a sampled audio signal
    5.
    发明公开
    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,用于采样音频信号的帧的编码和解码

    公开(公告)号:EP2144171A1

    公开(公告)日:2010-01-13

    申请号:EP08017661.3

    申请日:2008-10-08

    IPC分类号: G06F17/14 G10L19/02 G10L19/14

    摘要: An audio encoder (10) adapted for encoding frames of a sampled audio signal to obtain encoded frames, wherein a frame comprises a number of time domain audio samples. The audio encoder (10) comprises a predictive coding analysis stage (12) for determining information on coefficients of a synthesis filter and an excitation frame based on a frame of audio samples, the excitation frame comprising samples of an excitation signal for the synthesis filter. The audio encoder (10) further comprises a time-aliasing introducing transformer (14) for transforming overlapping excitation frames to the frequency domain to obtain excitation frame spectra, wherein the time-aliasing introducing transformer (14) is adapted for transforming the overlapping excitation frames in a critically-sampled way. Moreover, the audio encoder (10) comprises a redundancy reducing encoder (16) for encoding the excitation frame spectra to obtain the encoded frames based on the coefficients and the encoded excitation frame spectra.

    摘要翻译: 的音频编码器(10)适于编码采样音频信号以获得经编码的帧,worin一帧包括多个时域音频采样的帧。 音频编码器(10)包括用于在合成滤波器的系数的确定性采矿信息的预测编码分析级(12)和基于音频采样的帧上,以激励框架,所述激励框架包括用于合成滤波器的激励信号的采样。 音频编码器(10)还包括一个时间混叠用于转化重叠激励帧到频域,以获得激发帧频谱导入变换器(14),worin时间混叠导入变换器(14)是angepasst用于将重叠激发帧 在临界采样方式。 更上方,音频编码器(10)包括用于编码该激发帧频谱获得基于所述系数和编码的激发光谱帧的编码帧中的冗余减少编码器(16)。

    AUDIO ENCODER AND DECODER FOR ENCODING AND DECODING AUDIO SAMPLES
    6.
    发明公开
    AUDIO ENCODER AND DECODER FOR ENCODING AND DECODING AUDIO SAMPLES 有权
    用于编码和解码音频样本的音频编码器和解码器

    公开(公告)号:EP3002750A1

    公开(公告)日:2016-04-06

    申请号:EP15193588.9

    申请日:2009-06-26

    IPC分类号: G10L19/022 G10L19/20

    CPC分类号: G10L19/20 G10L19/022

    摘要: An audio encoder (100) for encoding audio samples, comprising a first time domain aliasing introducing encoder (110) for decoding audio samples in a first encoding domain, the first time domain aliasing introducing encoder (110) having a first framing rule, a start window and a stop window. The audio encoder (100) further comprises a second encoder (120) for encoding samples in a second encoding domain, the second encoder (120) having a predetermined frame size number of audio samples, and a coding warm-up period number of audio samples, the second encoder (120) having a different second framing rule, a frame of the second encoder (120) being an encoded representation of a number of timely subsequent audio samples, the number being equal to the predetermined frame size number of audio samples. The audio encoder (100) further comprises a controller (130) switching from the first encoder (110) to the second encoder (120) in response to characteristic of the audio samples, and for modifying the second framing rule in response to switching from the first encoder (110) to the second encoder (120) or for modifying the start window or the stop window of the first encoder (110), wherein the second framing rule remains unmodified.

    摘要翻译: 一种用于对音频样本进行编码的音频编码器(100),包括:第一时域混叠引入编码器(110),用于对第一编码域中的音频样本进行解码;第一时域混叠引入编码器(110),具有第一成帧规则; 窗口和停止窗口。 音频编码器(100)还包括用于对第二编码域中的采样进行编码的第二编码器(120),第二编码器(120)具有预定帧大小数量的音频采样以及音频采样的编码预热时段数量 ,所述第二编码器(120)具有不同的第二成帧规则,所述第二编码器(120)的帧是多个及时后续音频样本的编码表示,所述数量等于所述预定帧大小数量的音频样本。 音频编码器(100)还包括响应于音频采样的特性从第一编码器(110)切换到第二编码器(120)的控制器(130),以及响应于从第一编码器 第一编码器(110)发送到第二编码器(120)或用于修改第一编码器(110)的开始窗口或停止窗口,其中第二成帧规则保持不变。

    AUDIO ENCODER AND DECODER FOR ENCODING AND DECODING AUDIO SAMPLES
    8.
    发明公开
    AUDIO ENCODER AND DECODER FOR ENCODING AND DECODING AUDIO SAMPLES 审中-公开
    AUDIOCODIERER UND -DECODIERER ZUR CODIERUNG UND DECODIERUNG VON AUDIOPROBEN

    公开(公告)号:EP3002751A1

    公开(公告)日:2016-04-06

    申请号:EP15193589.7

    申请日:2009-06-26

    IPC分类号: G10L19/022 G10L19/20

    CPC分类号: G10L19/20 G10L19/022

    摘要: An audio encoder (100) for encoding audio samples, comprising a first time domain aliasing introducing encoder (110) for decoding audio samples in a first encoding domain, the first time domain aliasing introducing encoder (110) having a first framing rule, a start window and a stop window. The audio encoder (100) further comprises a second encoder (120) for encoding samples in a second encoding domain, the second encoder (120) having a predetermined frame size number of audio samples, and a coding warm-up period number of audio samples, the second encoder (120) having a different second framing rule, a frame of the second encoder (120) being an encoded representation of a number of timely subsequent audio samples, the number being equal to the predetermined frame size number of audio samples. The audio encoder (100) further comprises a controller (130) switching from the first encoder (110) to the second encoder (120) in response to characteristic of the audio samples, and for modifying the second framing rule in response to switching from the first encoder (110) to the second encoder (120) or for modifying the start window or the stop window of the first encoder (110), wherein the second framing rule remains unmodified.

    摘要翻译: 一种用于编码音频样本的音频编码器(100),包括用于对第一编码域中的音频样本进行解码的第一时域混叠引入编码器(110),具有第一成帧规则的第一时域混叠引入编码器(110) 窗口和停止窗口。 音频编码器(100)还包括用于对第二编码域中的采样进行编码的第二编码器(120),第二编码器(120)具有预定的帧大小的音频样本,以及编码预热周期数量的音频采样 ,所述第二编码器(120)具有不同的第二成帧规则,所述第二编码器(120)的帧是多个及时的后续音频采样的编码表示,所述数量等于所述预定帧大小数量的音频样本。 音频编码器(100)还包括响应于音频样本的特性从第一编码器(110)切换到第二编码器(120)的控制器(130),并响应于从第二编码器 第一编码器(110)到第二编码器(120)或用于修改第一编码器(110)的起始窗口或停止窗口,其中第二成帧规则保持未修改。