Apparatus and a method for decoding an encoded audio signal
    2.
    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。

    Audio Signal Synthesizer and Audio Signal Encoder
    4.
    发明申请
    Audio Signal Synthesizer and Audio Signal Encoder 有权
    音频信号合成器和音频信号编码器

    公开(公告)号:US20110173006A1

    公开(公告)日:2011-07-14

    申请号:US13004248

    申请日:2011-01-11

    IPC分类号: G10L19/00

    CPC分类号: G10L21/038 G10L19/02

    摘要: An audio signal synthesizer generates a synthesis audio signal having a first frequency band and a second synthesized frequency band derived from the first frequency band and comprises a patch generator, a spectral converter, a raw signal processor and a combiner. The patch generator performs at least two different patching algorithms, each patching algorithm generating a raw signal. The patch generator is adapted to select one of the at least two different patching algorithms in response to a control information. The spectral converter converts the raw signal into a raw signal spectral representation. The raw signal processor processes the raw signal spectral representation in response to spectral domain spectral band replication parameters to obtain an adjusted raw signal spectral representation.

    摘要翻译: 音频信号合成器生成具有从第一频带导出的第一频带和第二合成频带的合成音频信号,并且包括片生成器,频谱转换器,原始信号处理器和组合器。 补丁生成器执行至少两种不同的修补算法,每个修补算法生成原始信号。 补丁生成器适于响应于控制信息来选择至少两个不同的修补算法之一。 光谱转换器将原始信号转换为原始信号光谱表示。 原始信号处理器响应于频域谱带复制参数处理原始信号频谱表示,以获得经调整的原始信号频谱表示。

    Apparatus and Method for Calculating Bandwidth Extension Data Using a Spectral Tilt Controlled Framing
    5.
    发明申请
    Apparatus and Method for Calculating Bandwidth Extension Data Using a Spectral Tilt Controlled Framing 有权
    使用光谱倾斜控制框架计算带宽扩展数据的装置和方法

    公开(公告)号:US20110099018A1

    公开(公告)日:2011-04-28

    申请号:US12740610

    申请日:2009-06-23

    IPC分类号: G10L19/00

    CPC分类号: G10L21/038 G10L19/022

    摘要: An apparatus for calculating bandwidth extension data of an audio signal in a bandwidth extension system, in which a first spectral band is encoded with a first number of bits and a second spectral band different from the first spectral band is encoded with a second number of bits, the second number of bits being smaller than the first number of bits, has a controllable bandwidth extension parameter calculator for calculating bandwidth extension parameters for the second frequency band in a frame-wise manner for a sequence of frames of the audio signal. Each frame has a controllable start time instant. The apparatus additionally includes a spectral tilt detector for detecting a spectral tilt in a time portion of the audio signal and for signaling the start time instant for the individual frames of the audio signal depending on spectral tilt.

    摘要翻译: 一种用于计算带宽扩展系统中的音频信号的带宽扩展数据的装置,其中以第一数量的比特编码第一频谱带和与第一频谱带不同的第二频谱带来编码第二数量的比特 所述第二比特数小于所述第一比特数,具有可控带宽扩展参数计算器,用于以所述音频信号的一系列帧的逐帧方式计算所述第二频带的带宽扩展参数。 每个帧具有可控的开始时刻。 该装置还包括一个光谱倾斜检测器,用于检测音频信号的时间部分中的频谱倾斜,并且根据频谱倾斜来发送音频信号的各个帧的开始时刻。

    Method and apparatus for determining an estimate
    6.
    发明申请
    Method and apparatus for determining an estimate 有权
    用于确定估计的方法和装置

    公开(公告)号:US20070129940A1

    公开(公告)日:2007-06-07

    申请号:US11469418

    申请日:2006-08-31

    IPC分类号: G10L19/14

    CPC分类号: G10L19/025 G10L19/002

    摘要: For determining an estimate of a need for information units for encoding a signal, a measure for the distribution of the energy in the frequency band is taken into account in addition to the admissible interference for a frequency band and an energy of the frequency band. With this, a better estimate of the need for information units is obtained, so that coding can be done more efficiently and more accurately.

    摘要翻译: 为了确定对信号进行编码的信息单元的需求的估计,除了对于频带的容许干扰和频带的能量之外,还考虑了频带中的能量分布的度量。 因此,获得对信息单元的更好的估计,使得可以更有效和更准确地进行编码。

    Device and method for a bandwidth extension of an audio signal
    8.
    发明授权
    Device and method for a bandwidth extension of an audio signal 有权
    用于音频信号带宽扩展的设备和方法

    公开(公告)号:US08996362B2

    公开(公告)日:2015-03-31

    申请号:US12865096

    申请日:2009-01-20

    IPC分类号: G10L19/02 G10L21/038

    CPC分类号: G10L21/038

    摘要: For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a demicator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.

    摘要翻译: 对于音频信号的带宽扩展,在信号扩展器中,音频信号在时间上扩展大于1的扩展因子。然后将时间扩展的音频信号提供给清除器,以通过与 传播因子。 由该抽取操作产生的频带被提取和失真,并且最终与音频信号组合以获得带宽扩展音频信号。 滤波器组执行或变换实现中的相位声码器可用于信号扩展。