Audio Decoder, Audio Encoder, Methods for Decoding and Encoding an Audio Signal and Computer Program
    3.
    发明申请
    Audio Decoder, Audio Encoder, Methods for Decoding and Encoding an Audio Signal and Computer Program 有权
    音频解码器,音频编码器,解码和编码音频信号和计算机程序的方法

    公开(公告)号:US20100217607A1

    公开(公告)日:2010-08-26

    申请号:US12694912

    申请日:2010-01-27

    IPC分类号: G06F17/00

    CPC分类号: G10L19/022 G10L19/20

    摘要: An audio decoder for providing a decoded representation of an audio content on the basis of an encoded representation of the audio content comprises a linear-prediction-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of linear-prediction domain parameters associated with the audio frame and a frequency-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of frequency-domain parameters, taking into account a transform window out of a set comprising a plurality of different transform windows. The audio decoder comprises a signal combiner configured to overlap-and-add-time-domain representations of subsequent audio frames encoded in different domains, in order to smoothen a transition between the time-domain representations of the subsequent frames. The set of transform windows comprises one or more windows specifically adapted for a transition between a frequency-domain core mode and a linear-prediction-domain core mode.

    摘要翻译: 一种音频解码器,用于基于音频内容的编码表示来提供音频内容的解码表示,包括线性预测域解码器核心,被配置为基于一组设置提供音频帧的时域表示 与所述音频帧相关联的线性预测域参数和频域解码器核心,所述频域解码器核心被配置为基于一组频域参数来提供音频帧的时域表示,其考虑从 一组包括多个不同的变换窗口。 音频解码器包括信号组合器,其被配置为对在不同域中编码的后续音频帧进行重叠和相加时域表示,以平滑后续帧的时域表示之间的转换。 变换窗口集合包括一个或多个窗口,其特别适用于频域核心模式和线性预测域核心模式之间的转换。

    Audio decoder, audio encoder, methods for decoding and encoding an audio signal and computer program
    4.
    发明授权
    Audio decoder, audio encoder, methods for decoding and encoding an audio signal and computer program 有权
    音频解码器,音频编码器,用于对音频信号进行解码和编码的方法以及计算机程序

    公开(公告)号:US08457975B2

    公开(公告)日:2013-06-04

    申请号:US12694912

    申请日:2010-01-27

    IPC分类号: G10L21/00

    CPC分类号: G10L19/022 G10L19/20

    摘要: An audio decoder for providing a decoded representation of an audio content on the basis of an encoded representation of the audio content comprises a linear-prediction-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of linear-prediction domain parameters associated with the audio frame and a frequency-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of frequency-domain parameters, taking into account a transform window out of a set comprising a plurality of different transform windows. The audio decoder comprises a signal combiner configured to overlap-and-add-time-domain representations of subsequent audio frames encoded in different domains, in order to smoothen a transition between the time-domain representations of the subsequent frames. The set of transform windows comprises one or more windows specifically adapted for a transition between a frequency-domain core mode and a linear-prediction-domain core mode.

    摘要翻译: 一种音频解码器,用于基于音频内容的编码表示来提供音频内容的解码表示,包括线性预测域解码器核心,被配置为基于一组设置提供音频帧的时域表示 与所述音频帧相关联的线性预测域参数和频域解码器核心,所述频域解码器核心被配置为基于一组频域参数来提供音频帧的时域表示,其考虑从 一组包括多个不同的变换窗口。 音频解码器包括信号组合器,其被配置为对在不同域中编码的后续音频帧进行重叠和相加时域表示,以平滑后续帧的时域表示之间的转换。 变换窗口集合包括一个或多个窗口,其特别适用于频域核心模式和线性预测域核心模式之间的转换。

    Apparatus and a method for decoding an encoded audio signal
    7.
    发明授权
    Apparatus and a method for decoding an encoded audio signal 有权
    用于解码编码音频信号的装置和方法

    公开(公告)号:US08275626B2

    公开(公告)日:2012-09-25

    申请号:US13004272

    申请日:2011-01-11

    IPC分类号: G10L19/00

    摘要: An apparatus for decoding an encoded audio signal having first and second portions encoded in accordance with first and second encoding algorithms, respectively, BWE parameters for the first and second portions and a coding mode information indicating a first or a second decoding algorithm, includes first and second decoders, a BWE module and a controller. The decoders decode portions in accordance with decoding algorithms for time portions of the encoded signal to obtain decoded signals. The BWE module has a controllable crossover frequency and is configured for performing a bandwidth extension algorithm using the first decoded signal and the BWE parameters for the first portion, and for performing a bandwidth extension algorithm using the second decoded signal and the bandwidth extension parameter for the second portion. The controller controls the crossover frequency for the BWE module in accordance with the coding mode information.

    摘要翻译: 一种用于解码具有根据第一和第二编码算法编码的第一和第二部分的编码音频信号的装置,分别用于第一和第二部分的BWE参数和指示第一或第二解码算法的编码模式信息包括第一和第二编码算法 第二解码器,BWE模块和控制器。 解码器根据编码信号的时间部分的解码算法来解码部分,以获得解码信号。 BWE模块具有可控的交叉频率,并且被配置为使用第一解码信号和第一部分的BWE参数来执行带宽扩展算法,并且用于使用第二解码信号和带宽扩展参数来执行带宽扩展算法 第二部分。 控制器根据编码模式信息控制BWE模块的交叉频率。