AUDIO ENCODER AND AUDIO DECODER
    44.
    发明公开
    AUDIO ENCODER AND AUDIO DECODER 审中-公开
    音频编码器和音频解码器

    公开(公告)号:EP3300076A1

    公开(公告)日:2018-03-28

    申请号:EP17190130.9

    申请日:2009-05-18

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

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

    摘要: An audio encoder (100) for encoding segments of coefficients, the segments of coefficients representing different time or frequency resolutions of a sampled audio signal, the audio encoder (100) comprising a processor (110) 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 (100) further comprises an entropy encoder (120) 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(100),所述系数段表示采样音频信号的不同时间或频率分辨率,所述音频编码器(100)包括处理器(110),用于导出当前编码系数 基于先前编码的先前编码系数的当前片段的先前编码系数,所述先前编码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(100)还包括用于基于编码上下文对当前系数进行熵编码以获得编码音频流的熵编码器(120)。

    Audio decoder, method and computer program using a zero-input-response to obtain a smooth transition
    47.
    发明公开
    Audio decoder, method and computer program using a zero-input-response to obtain a smooth transition 审中-公开
    音频解码器,方法和计算机程序的零输入响应,以产生平滑的过渡

    公开(公告)号:EP2980797A1

    公开(公告)日:2016-02-03

    申请号:EP14178830.7

    申请日:2014-07-28

    IPC分类号: G10L19/20

    CPC分类号: G10L19/20 G10L19/02 G10L19/12

    摘要: An audio decoder (100;200;300) for providing a decoded audio information (112;212;312) on the basis of an encoded audio information (110;210;310), the audio decoder comprises a linear-prediction-domain decoder (120;220;320) configured to provide a first decoded audio information (122;222;322; S C (n)) on the basis of an audio frame encoded in a linear prediction domain, a frequency domain decoder (130;230;330) configured to provide a second decoded audio information (132;232;332; S M (n)) on the basis of an audio frame encoded in a frequency domain, and a transition processor (140;240;340).The transition processor is configured to obtain a zero-input-response (150; 256;348) of a linear predictive filtering(148; 254; 346), wherein an initial state (146;252;344) of the linear predictive filtering is defined in dependence on the first decoded audio information and the second decoded audio information. The transition processor is also configured to modify the second decoded audio information (132; 232;332;S M (n)), which is provided on the basis of an audio frame encoded in the frequency domain following an audio frame encoded in the linear prediction domain, in dependence on the zero-input-response, to obtain a smooth transition between the first decoded audio information (S C (n)) and the modified second decoded audio information ( S M ^ n ).

    摘要翻译: 音频解码器(100; 200; 300),用于提供已解码音频信息的编码音频信息的基础上(112; 312; 212)(110; 210; 310),所述音频解码器包括线性预测域解码器 (120; 220; 320)被配置为提供一个第一解码的音频信息(122; SC(N)222; 322); 230线性预测域,频域解码器(130编码的音频帧的基础上; 330)被配置为提供第二经解码的音频信息(132; 232; 332; SM(N))在频域编码的音频帧,以及过渡处理器(140的基础上; 240; 340)。该过渡处理器 被配置为获得一个零输入响应(; 254; 346 148),worin到初始化状态的线性预测滤波(150; 348; 256)(146; 252; 344)的线性预测滤波的依赖被定义 在第一解码的音频信息和第二解码的音频信息。 过渡处理器被如此配置以修改所述第二解码的音频信息(132; 232; 332; SM(N)),所有这些都设置在频域中编码的音频帧的基础上继在所述线性预测编码的音频帧 域,在该零输入响应的依赖性,以获得第一解码的音频信息之间和所述修改后的第二解码的音频信息(SM ^ N)的平滑过渡((SC n))的。

    Audio encoder, method for encoding an audio signal, audio stream and computer program
    48.
    发明公开
    Audio encoder, method for encoding an audio signal, audio stream and computer program 有权
    Vorrichtung und Verfahren zur Audiokodierung und korrespondierendes Computerprogramm

    公开(公告)号:EP2346029A1

    公开(公告)日:2011-07-20

    申请号:EP11157188.1

    申请日:2009-06-25

    IPC分类号: G10L19/00 G10L19/02

    摘要: An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal comprises a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also comprises an audio stream provider configured to provide the audio stream such that the audio stream comprises an information describing an audio content of the frequency bands and an information describing the multi-band quantization error.
    A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal comprises a noise filler configured to introduce noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.

    摘要翻译: 一种用于基于输入音频信号的变换域表示来提供音频流的编码器包括:量化误差计算器,被配置为确定输入音频信号的多个频带上的多频带量化误差, 获取信息可用。 编码器还包括被配置为提供音频流的音频流提供器,使得音频流包括描述频带的音频内容的信息和描述多频带量化误差的信息。 用于基于表示音频信号的频带的频带的频谱分量的编码音频流提供音频信号的解码表示的解码器包括:噪声填充器,被配置为将噪声引入多个频带的频谱分量中, 基于公共多频带噪声强度值来关联频带增益信息。

    Device and method for manipulating an audio signal having a transient event
    49.
    发明公开
    Device and method for manipulating an audio signal having a transient event 审中-公开
    设备和方法,用于操纵具有瞬变事件的音频信号

    公开(公告)号:EP2296145A2

    公开(公告)日:2011-03-16

    申请号:EP10194086.4

    申请日:2009-02-17

    IPC分类号: G10L21/04

    CPC分类号: G10L21/04 G10L19/025

    摘要: A signal manipulator for manipulating an audio signal having a transient event may comprise a transient remover (100), a signal processor (110) and a signal inserter (120) for inserting a time portion in a processed audio signal at a signal location where the transient event was removed before processing by said transient remover, so that a manipulated audio signal comprises a transient event not influenced by the processing, whereby the vertical coherence of the transient event is maintained instead of any processing performed in the signal processor (110), which would destroy the vertical coherence of a transient.

    摘要翻译: 用于音频信号的操纵具有瞬变事件可以包括瞬态消除(100),信号处理器(110)和信号插入器(120),用于在信号位置处插入一个处理的音频信号的时间部分的信号操纵器,其中 由所述瞬态消除处理之前可以除去,所以没有被操纵的音频信号的瞬态事件包括没有被处理,由此,瞬态事件的垂直相干被维持,而不是在信号处理器执行的任何处理(110)的影响的瞬变事件 这将破坏一个短暂的垂直连贯性。

    Device and method for manipulating an audio signal having a transient event
    50.
    发明公开
    Device and method for manipulating an audio signal having a transient event 有权
    装置和方法用于与瞬态事件操纵的音频信号

    公开(公告)号:EP2293294A2

    公开(公告)日:2011-03-09

    申请号:EP10194088.0

    申请日:2009-02-17

    IPC分类号: G10L21/00

    CPC分类号: G10L21/04 G10L19/025

    摘要: A signal manipulator for manipulating an audio signal having a transient event may comprise a transient remover (100), a signal processor (110) and a signal inserter (120) for inserting a time portion in a processed audio signal at a signal location where the transient event was removed before processing by said transient remover, so that a manipulated audio signal comprises a transient event not influenced by the processing, whereby the vertical coherence of the transient event is maintained instead of any processing performed in the signal processor (110), which would destroy the vertical coherence of a transient.

    摘要翻译: 用于音频信号的操纵具有瞬变事件可以包括瞬态消除(100),信号处理器(110)和信号插入器(120),用于在信号位置处插入一个处理的音频信号的时间部分的信号操纵器,其中 由所述瞬态消除处理之前可以除去,所以没有被操纵的音频信号的瞬态事件包括没有被处理,由此,瞬态事件的垂直相干被维持,而不是在信号处理器执行的任何处理(110)的影响的瞬变事件 这将破坏一个短暂的垂直连贯性。