AN APPARATUS AND A METHOD FOR CALCULATING A NUMBER OF SPECTRAL ENVELOPES
    1.
    发明申请
    AN APPARATUS AND A METHOD FOR CALCULATING A NUMBER OF SPECTRAL ENVELOPES 审中-公开
    一种用于计算多个谱包络的装置和方法

    公开(公告)号:WO2010003546A2

    公开(公告)日:2010-01-14

    申请号:PCT/EP2009/004523

    申请日:2009-06-23

    CPC classification number: G10L21/038 G10L19/0208 G10L19/025 G10L19/20

    Abstract: An apparatus (100) calculates a number (102) of spectral envelopes (104) to be derived by a spectral band replication (SBR) encoder, wherein the SBR encoder is adapted to encode an audio signal (105) using a plurality of sample values within a predetermined number of subsequent time portions (110) in an SBR frame extending from an initial time (t0) to a final time (tn), the predetermined number of subsequent time portions (110) being arranged in a time sequence given by the audio signal (105). The apparatus (100) comprises a decision value calculator (120) for determining a decision value (125), the decision value (125) measuring a deviation in spectral energy distributions of a pair of neighboring time portions. The apparatus (100) further comprises a detector (130) for detecting a violation (135) of a threshold by the decision value (125) and a processor (140) for determining a first envelope border (145) between the pair of neighboring time portions when the violation (135) of the threshold is detected. The apparatus (100) further comprises a processor (150) for determining a second envelope border (155) between a different pair of neighboring time portions or at the initial time (t0) or at the final time (tn) for an envelope having the first envelope border (145) based on the violation (135) of the threshold for the other pair or based on a temporal position of the pair or the different pair in the SBR frame. The apparatus (100) further comprises a number processor (160) for establishing the number (102) of spectral envelopes (104) having the first envelope border (145) and the second envelope border (155).

    Abstract translation: 一种设备(100)计算将由频谱带复制(SBR)编码器导出的谱包络(104)的数量(102),其中SBR编码器适于编码音频信号( (t0)延伸至最终时间(tn)的SBR帧中的预定数量的后续时间部分(110)内的多个采样值,所述预定数量的后续时间部分(110) 以由音频信号(105)给出的时间顺序排列。 装置(100)包括用于确定判决值(125)的判定值计算器(120),判定值(125)测量一对相邻时间部分的频谱能量分布中的偏差。 所述设备(100)还包括用于由所述判决值(125)检测阈值的违反(135)的检测器(130)和用于确定所述一对相邻时间之间的第一包络边界(145)的处理器(140) 当检测到阈值的违反(135)时的部分。 装置(100)还包括处理器(150),用于确定不同的一对相邻时间部分之间或者在初始时间(t0)或者在最后时间(tn)之间的第二包络边界(155) 第一包络边界(145)基于另一个对的阈值的违反(135)或基于SBR帧中该对或不同对的时间位置。 该设备(100)还包括用于建立具有第一包络边界(145)和第二包络边界(155)的频谱包络(104)的数量(102)的号码处理器(160)。

    RESAMPLING OUTPUT SIGNALS OF QMF BASED AUDIO CODECS
    2.
    发明申请
    RESAMPLING OUTPUT SIGNALS OF QMF BASED AUDIO CODECS 审中-公开
    基于QMF的音频编解码器的输出信号

    公开(公告)号:WO2012020090A1

    公开(公告)日:2012-02-16

    申请号:PCT/EP2011/063848

    申请日:2011-08-11

    Abstract: An apparatus for processing an audio signal is provided. The apparatus comprises a configurable first audio signal processor (110) for processing the audio signal (s 0 ) in accordance with different configuration settings (conf) to obtain a processed audio signal (s 1 ), wherein the apparatus is adapted so that different configuration settings (conf) result in different sampling rates (sr 1 ) of the processed audio signal (s 1 ). The apparatus furthermore comprises n analysis filter bank (120) having a first number (c 1 ) of analysis filter bank channels, a synthesis filter bank (130) having a second number (c 2 ) of synthesis filter bank channels, a second audio processor (140) being adapted to receive and process an audio signal (s 2 ) having a predetermined sampling rate (sr 2 ), and a controller (150) for controlling the first number (c 1 ) of analysis filter bank channels or the second number (c 2 ) of synthesis filter bank channels in accordance with a configuration setting (conf).

    Abstract translation: 提供一种用于处理音频信号的装置。 该装置包括可配置的第一音频信号处理器(110),用于根据不同的配置设置(conf)处理音频信号(s0)以获得经处理的音频信号(s1),其中该装置适于使得不同的配置设置( conf)导致处理后的音频信号(s1)的不同采样率(sr1)。 该装置还包括具有第一数量(c1)分析滤波器组信道的n个分析滤波器组(120),具有第二数量(c2)合成滤波器组信道的合成滤波器组(130),第二音频处理器 )适于接收和处理具有预定采样率(sr2)的音频信号(s2),以及控制器(150),用于控制分析滤波器组信道的第一数量(c1)或第二数目(c2)的合成 滤波器组通道根据配置设置(conf)。

    AN APPARATUS AND A METHOD FOR CALCULATING A NUMBER OF SPECTRAL ENVELOPES
    4.
    发明申请
    AN APPARATUS AND A METHOD FOR CALCULATING A NUMBER OF SPECTRAL ENVELOPES 审中-公开
    一种用于计算多个光谱包络的装置和方法

    公开(公告)号:WO2010003546A3

    公开(公告)日:2010-03-04

    申请号:PCT/EP2009004523

    申请日:2009-06-23

    CPC classification number: G10L21/038 G10L19/0208 G10L19/025 G10L19/20

    Abstract: An apparatus (100) calculates a number (102) of spectral envelopes (104) to be derived by a spectral band replication (SBR) encoder, wherein the SBR encoder is adapted to encode an audio signal (105) using a plurality of sample values within a predetermined number of subsequent time portions (110) in an SBR frame extending from an initial time (t0) to a final time (tn), the predetermined number of subsequent time portions (110) being arranged in a time sequence given by the audio signal (105). The apparatus (100) comprises a decision value calculator (120) for determining a decision value (125), the decision value (125) measuring a deviation in spectral energy distributions of a pair of neighboring time portions. The apparatus (100) further comprises a detector (130) for detecting a violation (135) of a threshold by the decision value (125) and a processor (140) for determining a first envelope border (145) between the pair of neighboring time portions when the violation (135) of the threshold is detected. The apparatus (100) further comprises a processor (150) for determining a second envelope border (155) between a different pair of neighboring time portions or at the initial time (t0) or at the final time (tn) for an envelope having the first envelope border (145) based on the violation (135) of the threshold for the other pair or based on a temporal position of the pair or the different pair in the SBR frame. The apparatus (100) further comprises a number processor (160) for establishing the number (102) of spectral envelopes (104) having the first envelope border (145) and the second envelope border (155).

    Abstract translation: 一种装置(100)计算由谱带复制(SBR)编码器导出的频谱包络(104)的数目(102),其中SBR编码器适于使用多个采样值对音频信号(105)进行编码 在从初始时间(t0)延伸到最后时间(tn)的SBR帧中的预定数量的后续时间部分(110)中,预定数量的后续时间部分(110)按照由 音频信号(105)。 装置(100)包括用于确定判定值(125)的判定值计算器(120),所述判定值(125)测量一对相邻时间部分的频谱能量分布的偏差。 所述设备(100)还包括检测器(130),用于通过所述判定值(125)检测阈值的违规(135);以及处理器(140),用于确定所述一对相邻时间之间的第一包络边界(145) 当检测到阈值的违规(135)时的部分。 所述装置(100)还包括处理器(150),用于确定不同对相邻时间部分之间的第二信封边界(155),或者在具有所述相邻时间部分的信封的初始时间(t0)或最后时间(tn) 基于另一对的阈值的违规(135)或者基于SBR帧中的对或不同对的时间位置的第一包络边界(145)。 所述设备(100)还包括用于建立具有所述第一信封边界(145)和所述第二信封边界(155)的频谱包络(104)的数量(102)的数字处理器(160)。

    KODIERUNG EINES INFORMATIONSSIGNALS
    5.
    发明申请
    KODIERUNG EINES INFORMATIONSSIGNALS 审中-公开
    编码信息信号

    公开(公告)号:WO2008046505A1

    公开(公告)日:2008-04-24

    申请号:PCT/EP2007/008527

    申请日:2007-10-01

    CPC classification number: G10L21/038 G10L19/025

    Abstract: Das Transientenproblem kann ausreichend adressiert und dafür eine weitere Verzögerung auf Seiten der Decodierung reduziert werden, wenn eine neue SBR-Frame-Klasse verwendet wird, bei der die Framegrenzen (902a, 902b) nicht verschoben werden, d. h. die Rastergrenzen immer noch mit den Framegrenzen (902a, 902b) synchronisiert sind, aber bei der ferner eine Transientenpositionsangabe (T) als Syntaxelement verwendet wird, um codierer- bzw. decodiererseitig innerhalb der Frames dieser neuen Frameklasse zur Bestimmung der Rastergrenzen innerhalb dieser Frames verwendet zu werden.

    Abstract translation: 瞬态问题可以充分解决和用于在解码侧的进一步延迟可以当使用新的SBR帧D类被减小,其中,所述帧边界(902A,902B)不移动,。 小时。 与帧边界(902A,902B)的光栅边界仍是同步的,但会进一步地,其中用作语法元素或使用编码器的瞬时位置(T)这一新的帧类的帧内解码器侧,以确定这些帧中的栅格界限 是。

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