Audio encoder and decoder for encoding frames of sampled audio signals
    3.
    发明授权
    Audio encoder and decoder for encoding frames of sampled audio signals 有权
    用于编码采样音频信号帧的音频编码器和解码器

    公开(公告)号:US08751246B2

    公开(公告)日:2014-06-10

    申请号:US13004335

    申请日:2011-01-11

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

    CPC分类号: G10L19/20

    摘要: An audio encoder adapted for encoding frames of a sampled audio signal to obtain encoded frames, wherein a frame has a number of time domain audio samples, having a predictive coding analysis stage for determining information on coefficients of a synthesis filter and information on a prediction domain frame based on a frame of audio samples. The audio encoder further has a frequency domain transformer for transforming a frame of audio samples to the frequency domain to obtain a frame spectrum and an encoding domain decider for deciding whether encoded data for a frame is based on the information on the coefficients and on the information on the prediction domain frame, or based on the frame spectrum. Moreover, the audio encoder has a controller for determining an information on a switching coefficient when the encoding domain decider decides that encoded data of a current frame is based on the information on the coefficients and the information on the prediction domain frame when encoded data of a previous frame was encoded based on a previous frame spectrum and a redundancy reducing encoder for encoding the information on the prediction domain frame, the information on the coefficients, the information on the switching coefficient and/or the frame spectrum.

    摘要翻译: 一种音频编码器,用于对采样的音频信号的帧进行编码以获得编码的帧,其中帧具有多个时域音频样本,具有用于确定关于合成滤波器的系数的信息的预测编码分析阶段和关于预测域的信息 基于一帧音频样本。 音频编码器还具有用于将音频样本的帧变换到频域以获得帧频的频域变换器,以及用于决定帧的编码数据是否基于关于系数和信息的信息的编码域决定器 在预测域帧上,或基于帧频谱。 此外,音频编码器具有控制器,用于当编码域决定器根据关于系数的信息和关于预测域帧的信息确定当前帧的编码数据时,确定关于切换系数的信息,当编码数据 前一帧是基于先前的帧频编码的,并且用于对预测域帧上的信息进行编码的冗余减少编码器,关于系数的信息,关于切换系数和/或帧频谱的信息。

    AUDIO ENCODER, AUDIO DECODER, METHOD FOR ENCODING AND DECODING AN AUDIO INFORMATION, AND COMPUTER PROGRAM OBTAINING A CONTEXT SUB-REGION VALUE ON THE BASIS OF A NORM OF PREVIOUSLY DECODED SPECTRAL VALUES
    4.
    发明申请
    AUDIO ENCODER, AUDIO DECODER, METHOD FOR ENCODING AND DECODING AN AUDIO INFORMATION, AND COMPUTER PROGRAM OBTAINING A CONTEXT SUB-REGION VALUE ON THE BASIS OF A NORM OF PREVIOUSLY DECODED SPECTRAL VALUES 有权
    音频编码器,音频解码器,用于编码和解码音频信息的方法以及基于先前解码的频谱值的正态分布获取上下文分区值的计算机程序

    公开(公告)号:US20130013322A1

    公开(公告)日:2013-01-10

    申请号:US13547640

    申请日:2012-07-12

    IPC分类号: G10L19/00

    摘要: An audio decoder has an arithmetic decoder for providing decoded spectral values on the basis of an arithmetically-encoded representation and a frequency-domain-to-time-domain converter for providing a time-domain audio representation. The arithmetic decoder selects a mapping rule describing a mapping of a code value onto a symbol code in dependence on a context state described by a numeric current context value which is determined in dependence on previously decoded spectral values. The arithmetic decoder obtains a plurality of context subregion values on the basis of previously decoded spectral values and derives a numeric current context value associated with one or more spectral values to be decoded in dependence on stored context subregion values. The arithmetic decoder computes the norm of a vector formed by a plurality of previously decoded spectral values in order to obtain a common context subregion value. An audio encoder uses a similar concept.

    摘要翻译: 音频解码器具有算术解码器,用于基于算术编码的表示提供解码的频谱值,以及用于提供时域音频表示的频域 - 时域转换器。 算术解码器根据由根据先前解码的频谱值确定的数字当前上下文值描述的上下文状态来选择描述代码值到符号代码上的映射规则的映射规则。 算术解码器基于先前解码的频谱值获得多个上下文子区域值,并且根据存储的上下文子区域值导出与待解码的一个或多个频谱值相关联的数字当前上下文值。 算术解码器计算由多个先前解码的频谱值形成的矢量的范数,以便获得公共的上下文子区域值。 音频编码器使用类似的概念。

    Apparatus and a method for decoding an encoded audio signal
    6.
    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 Encoder and Audio Decoder
    8.
    发明申请
    Audio Encoder and Audio Decoder 有权
    音频编码器和音频解码器

    公开(公告)号:US20110173007A1

    公开(公告)日:2011-07-14

    申请号:US13004282

    申请日:2011-01-11

    IPC分类号: G10L19/00

    CPC分类号: G10L19/02 G10L19/022 H03M7/30

    摘要: An audio encoder for encoding segments of coefficients, the segments of coefficients representing different time or frequency resolutions of a sampled audio signal, the audio encoder including a processor for deriving a coding context for a currently encoded coefficient of a current segment based on a previously encoded coefficient of a previous segment, the previously encoded coefficient representing a different time or frequency resolution than the currently encoded coefficient. The audio encoder further includes an entropy encoder for entropy encoding the current coefficient based on the coding context to obtain an encoded audio stream.

    摘要翻译: 一种用于对系数段进行编码的音频编码器,表示采样音频信号的不同时间或频率分辨率的系数段,音频编码器包括用于基于先前编码的当前段的当前编码系数导出编码上下文的处理器 前一段的系数,先前编码的系数表示与当前编码系数不同的时间或频率分辨率。 音频编码器还包括熵编码器,用于基于编码上下文对当前系数进行熵编码,以获得经编码的音频流。

    Audio Signal Synthesizer and Audio Signal Encoder
    9.
    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。

    AUDIO ENCODER FOR ENCODING AN AUDIO SIGNAL HAVING AN IMPULSE-LIKE PORTION AND STATIONARY PORTION, ENCODING METHODS, DECODER, DECODING METHOD, AND ENCODING AUDIO SIGNAL
    10.
    发明申请
    AUDIO ENCODER FOR ENCODING AN AUDIO SIGNAL HAVING AN IMPULSE-LIKE PORTION AND STATIONARY PORTION, ENCODING METHODS, DECODER, DECODING METHOD, AND ENCODING AUDIO SIGNAL 有权
    用于编码具有脉冲样部分和静止部分的音频信号的编码器,编码方法,解码器,解码方法和编码音频信号

    公开(公告)号:US20100262420A1

    公开(公告)日:2010-10-14

    申请号:US12663828

    申请日:2008-06-05

    IPC分类号: G10L19/00

    CPC分类号: G10L19/20

    摘要: An audio encoder for encoding an audio signal includes an impulse extractor for extracting an impulse-like portion from the audio signal. This impulse-like portion is encoded and forwarded to an output interface. Furthermore, the audio encoder includes a signal encoder which encodes a residual signal derived from the original audio signal so that the impulse-like portion is reduced or eliminated in the residual audio signal. The output interface forwards both, the encoded signals, i.e., the encoded impulse signal and the encoded residual signal for transmission or storage. On the decoder-side, both signal portions are separately decoded and then combined to obtain a decoded audio signal.

    摘要翻译: 用于对音频信号进行编码的音频编码器包括用于从音频信号中提取脉冲状部分的脉冲提取器。 该脉冲状部分被编码并转发到输出接口。 此外,音频编码器包括信号编码器,其对从原始音频信号导出的残留信号进行编码,从而在残留音频信号中减少或消除脉冲状部分。 输出接口转发编码的信号,即编码的脉冲信号和编码的残留信号用于传输或存储。 在解码器侧,两个信号部分被单独解码,然后被组合以获得解码的音频信号。