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1. 发明公开

EP3353777A1 METHOD AND SYSTEM FOR TIME DOMAIN DOWN MIXING A STEREO SOUND SIGNAL INTO PRIMARY AND SECONDARY CHANNELS USING DETECTING AN OUT-OF-PHASE CONDITION OF THE LEFT AND RIGHT CHANNELS 有权
公开(公告)号：EP3353777A1
公开(公告)日：2018-08-01
申请号：EP16847683.6
申请日：2016-09-22
申请人： VoiceAge Corporation
发明人： VAILLANCOURT, Tommy , JELINEK, Milan
IPC分类号： G10L19/008 , G10L19/02 , H04S1/00
CPC分类号： G10L19/008 , G10L19/002 , G10L19/032 , G10L19/06 , G10L19/09 , G10L19/24 , G10L25/03 , G10L25/21 , G10L25/51 , H04S1/007 , H04S2400/01 , H04S2400/03
摘要： A stereo sound encoding method and system, for encoding left and right channels of a stereo sound signal, down mix the left and right channels of the stereo sound signal to produce primary and secondary channels and encode the primary and secondary channels. Encoding the primary channel and encoding the secondary channel comprise determining a first bit budget to encode the primary channel and a second bit budget to encode the secondary channel. If the second bit budget is sufficient, the secondary channel is encoded using a four subframes model and, if the second bit budget is insufficient for using the four subframes model, the secondary channel is encoded using a two subframes model.

2. 发明授权

EP2830057B1 ENCODING OF AN AUDIO SIGNAL 有权
公开(公告)号：EP2830057B1
公开(公告)日：2018-07-11
申请号：EP13793620.9
申请日：2013-05-22
申请人： Nippon Telegraph and Telephone Corporation
发明人： MORIYA, Takehiro , KAMAMOTO, Yutaka , HARADA, Noboru , HIWASAKI, Yusuke , FUKUI, Masahiro
IPC分类号： G10L25/90 , G10L19/09 , G10L19/02 , G10L19/032 , G10L19/00
CPC分类号： G10L19/09 , G10L19/0017 , G10L19/0212 , G10L19/032 , G10L19/08 , G10L25/90 , G10L2025/903 , G10L2025/906
摘要： A frequency-domain sample interval corresponding to a time-domain pitch period L corresponding to a time-domain pitch period code of an audio signal in a given time period is obtained as a converted interval T 1 , a frequency-domain pitch period T is chosen from among candidates including the converted interval T 1 and integer multiples U x T 1 of the converted interval T 1 , and a frequency-domain pitch period code indicating how many times the frequency-domain pitch period T is greater than the converted interval T 1 is obtained. The frequency-domain pitch period code is output so that a decoding side can identify the frequency-domain pitch period T.

3. 发明授权

EP3079152B1 AUDIO DECODING WITH SELECTIVE POST FILTERING 有权转让
公开(公告)号：EP3079152B1
公开(公告)日：2018-06-06
申请号：EP16166356.2
申请日：2011-06-23
申请人： Dolby International AB
发明人： RESCH, Barbara , KJOERLING, Kristofer , VILLEMOES, Lars
IPC分类号： G10L19/26 , G10L19/02 , G10L19/107 , G10L19/20
CPC分类号： G10L19/26 , G10L19/02 , G10L19/0212 , G10L19/032 , G10L19/09 , G10L19/107 , G10L19/12 , G10L19/125 , G10L19/20 , G10L19/22 , G10L19/265 , G10L21/003 , G10L21/007 , G10L21/013
摘要： An audio encoding method is characterized by a decision being made as to whether the device which will decode the resulting bit stream should apply post filtering including attenuation of interharmonic noise. Hence, the decision whether to use the post filter, which is encoded in the bit stream, is taken separately from the decision as to the most suitable coding mode. In another aspect, there is provided an audio decoding method with a decoding step followed by a post-filtering step, including an amount of interharmonic noise attenuation determined by a variable gain, and being characterized in a step of setting the gain to zero or near-zero in accordance with post filtering information encoded in the bit stream signal. Such a method is well suited for mixed-origin audio signals by virtue of its capability to deactivate the post filter in dependence of the post filtering information only, hence independently of factors such as the current coding mode.

4. 发明公开

EP3296992A1 APPARATUS AND METHOD FOR MODIFYING A PARAMETERIZED REPRESENTATION 有权转让
标题翻译：用于修改参数表示的装置和方法
公开(公告)号：EP3296992A1
公开(公告)日：2018-03-21
申请号：EP17189421.5
申请日：2008-08-27
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： DISCH, Sascha
IPC分类号： G10L19/16 , G10L19/20 , G10L19/02 , G10L25/90 , G10L19/09
CPC分类号： G10L19/0204 , G10L19/09 , G10L19/16 , G10L19/20 , G10L25/90
摘要： An apparatus for modifying a parameterized representation having, for a time portion of an audio signal, band pass filter information for a plurality of band pass filters, the band pass filter information indicating time-varying band pass filter center frequencies of band pass filters having band widths, which depend on a band pass filter center frequency of the corresponding band pass filters, and having amplitude modulation or phase modulation or frequency modulation information for each band pass filter for the time portion of the audio signal, the modulation information being related to the center frequencies of the band pass filters, comprises: a modifier (160) for modifying the time varying center frequencies or for modifying the amplitude modulation or phase modulation or frequency modulation information and for generating a modified parameterized representation, in which the band widths of the band pass filters depend on the band pass filter center frequencies of the corresponding band pass filters, wherein the modifier (160) is operative to modify the amplitude modulation information or the phase modulation information or the frequency modulation information by a non-linear decomposition into a coarse structure and a fine structure and by only modifying either the coarse structure or the fine structure.
摘要翻译：一种用于修改参数化表示的装置，该参数化表示对于音频信号的时间部分具有用于多个带通滤波器的带通滤波器信息，带通滤波器信息指示具有带的带通滤波器的时变带通滤波器中心频率其取决于相应带通滤波器的带通滤波器中心频率，并且对于音频信号的时间部分的每个带通滤波器具有振幅调制或相位调制或频率调制信息，调制信息与包括：修改器（160），用于修改时变中心频率或用于修改振幅调制或相位调制或频率调制信息并用于生成修改的参数化表示，其中，所述带通滤波器的带宽带通滤波器取决于相应的带通滤波器中心频率其中所述修改器（160）用于通过非线性分解将所述幅度调制信息或所述相位调制信息或所述频率调制信息修改为粗糙结构和精细结构，并且通过仅修改所述粗糙结构结构或精细结构。

5. 发明授权

EP2492911B1 AUDIO ENCODING APPARATUS, DECODING APPARATUS, METHOD, CIRCUIT AND PROGRAM 有权
标题翻译：音频编码装置，解码装置，方法，电路和程序
公开(公告)号：EP2492911B1
公开(公告)日：2017-08-16
申请号：EP10824667.9
申请日：2010-10-21
申请人： Panasonic Intellectual Property Management Co., Ltd.
发明人： ISHIKAWA, Tomokazu , NORIMATSU, Takeshi , CHONG, Kok Seng , ZHOU, Huan , ZHONG, Haishan
IPC分类号： G10L19/02 , G10L19/26 , G10L25/90
CPC分类号： G10L19/265 , G10L19/008 , G10L19/0212 , G10L19/09 , G10L25/90
摘要： Provided is an encoding device (1) including: a pitch contour analysis unit (101) which detects information, a dynamic time-warping unit (102) which generates, based on the information, pitch change ratios (Tw_ratio in Fig. 18 ) within a range (86) including a range (86a) of the pitch change ratios corresponding to absolute pitch differences of 42 cents or larger; a first lossless coding unit (103) which codes the generated pitch parameters (102x); a time-warping unit (104) which shifts a pitch of a signal according to the information; and a second encoding unit which codes a signal (104x) obtained by the shifting.
摘要翻译：提供了一种编码装置（1），包括：检测信息的音调轮廓分析单元（101），基于该信息生成在音调周期内的音调变化比率（图18中的Tw_ratio）的动态时间规整单元（102）包括对应于42分或更大的绝对音高差的音高变化比的范围（86a）的范围（86）第一无损编码单元（103），其对所生成的音调参数（102x）进行编码; 时间扭曲单元（104），根据所述信息来改变信号的音调; 以及第二编码单元，对通过移位获得的信号（104x）进行编码。

6. 发明授权

EP3011559B1 APPARATUS AND METHOD REALIZING A FADING OF AN MDCT SPECTRUM TO WHITE NOISE PRIOR TO FDNS APPLICATION 有权
标题翻译：在FDNS应用程序之前实现MDCT频谱向白噪声衰落的装置和方法
公开(公告)号：EP3011559B1
公开(公告)日：2017-07-26
申请号：EP14732195.4
申请日：2014-06-23
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： SCHNABEL, Michael , MARKOVIC, Goran , SPERSCHNEIDER, Ralph , LECOMTE, Jérémie , HELMRICH, Christian
IPC分类号： G10L19/005
CPC分类号： G10L19/005 , G10L19/002 , G10L19/012 , G10L19/0212 , G10L19/06 , G10L19/07 , G10L19/083 , G10L19/09 , G10L19/12 , G10L19/22 , G10L2019/0002 , G10L2019/0011 , G10L2019/0016
摘要： An apparatus for decoding an encoded audio signal to obtain a reconstructed audio signal is provided, having: a receiving interface for receiving one or more frames, a coefficient generator, and a signal reconstructor. The coefficient generator is configured to determine one or more first audio signal coefficients, and one or more noise coefficients. Moreover, the coefficient generator is configured to generate one or more second audio signal coefficients, depending on the one or more first audio signal coefficients and depending on the one or more noise coefficients. The audio signal reconstructor is configured to reconstruct a first portion of the reconstructed audio signal depending on the one or more first audio signal coefficients and the audio signal reconstructor is configured to reconstruct a second portion of the reconstructed audio signal depending on the one or more second audio signal coefficients, if the current frame is not received by the receiving interface or if the current frame being received by the receiving interface is corrupted.
摘要翻译：提供了一种用于对编码的音频信号进行解码以获得重建的音频信号的装置，具有：用于接收一个或多个帧的接收接口，系数发生器和信号重构器。系数发生器被配置为确定一个或多个第一音频信号系数以及一个或多个噪声系数。此外，系数发生器被配置为根据一个或多个第一音频信号系数并且取决于一个或多个噪声系数来生成一个或多个第二音频信号系数。音频信号重构器被配置为根据一个或多个第一音频信号系数来重建重建的音频信号的第一部分，并且音频信号重构器被配置为根据一个或多个第二音频信号重建重建的音频信号的第二部分音频信号系数，如果接收接口没有接收到当前帧，或者接收接口接收到的当前帧被破坏。

7. 发明授权

EP2384506B1 SPEECH CODING METHOD AND APPARATUS 有权转让
标题翻译： VERFAHREN UND APPARATUS ZUR SPRACHKODIERUNG
公开(公告)号：EP2384506B1
公开(公告)日：2017-05-03
申请号：EP10700155
申请日：2010-01-05
申请人： SKYPE
发明人： VOS KOEN BERNARD
IPC分类号： G10L19/09 , G10L19/04
CPC分类号： G10L19/09 , G10L19/04
摘要： A method of encoding speech, the method comprising: receiving a signal representative of speech to be encoded; at each of a plurality of intervals during the encoding, determining a pitch lag between portions of the signal having a degree of repetition; selecting for a set of said intervals a pitch lag vector from a pitch lag codebook of such vectors, each pitch lag vector comprising a set of offsets corresponding to the offset between the pitch lag determined for each said interval and an average pitch lag for said set of intervals, and transmitting an indication of the selected vector and said average over a transmission medium as part of the encoded signal representative of said speech.
摘要翻译：一种对语音进行编码的方法，该方法包括：接收表示要被编码的语音的信号; 在编码期间的多个间隔中的每一个间隔处，确定信号的具有重复程度的部分之间的音调滞后; 从这些向量的音调滞后码本中为一组所述间隔选择一个音调滞后向量，每个音调滞后向量包括一组偏移量，所述一组偏移量对应于针对每个所述间隔确定的音调滞后与所述集合的平均音调滞后之间的偏移作为代表所述语音的编码信号的一部分，通过传输介质发送所选向量和所述平均值的指示。

8. 发明公开

EP2922053A4 AUDIO CODING DEVICE, AUDIO CODING METHOD, AUDIO CODING PROGRAM, AUDIO DECODING DEVICE, AUDIO DECODING METHOD, AND AUDIO DECODING PROGRAM 无效
标题翻译：澳大利亚电力公司，澳大利亚电力公司，澳大利亚电力公司，澳大利亚电力公司，澳大利亚电力公司，澳大利亚电力公司，AUODODODECTORIERUNGSPROGRAMM
公开(公告)号：EP2922053A4
公开(公告)日：2016-07-06
申请号：EP13854879
申请日：2013-11-12
申请人： NTT DOCOMO INC
发明人： TSUTSUMI KIMITAKA , KIKUIRI KEI , YAMAGUCHI ATSUSHI
IPC分类号： G10L19/005 , G10L19/09 , H03M7/30
CPC分类号： G10L19/125 , G10L19/005 , G10L19/09
摘要： An objective of the present invention is, when packet loss occurs in audio encoding, to recover audio quality without increasing algorithmic delay. An audio signal transmission device for encoding an audio signal includes an audio encoding unit that encodes an audio signal and a side information encoding unit that calculates and encodes side information from a look-ahead signal. On the other hand, an audio signal receiving device for decoding an audio code and outputting an audio signal includes an audio code buffer that detects packet loss based on a received state of an audio packet, an audio parameter decoding unit that decodes an audio code when an audio packet is correctly received, a side information decoding unit that decodes a side information code when an audio packet is correctly received, a side information accumulation unit that accumulates side information obtained by decoding a side information code, an audio parameter missing processing unit that outputs an audio parameter when audio packet loss is detected, and an audio synthesis unit that synthesizes a decoded audio from an audio parameter.
摘要翻译：本发明的目的是当在音频编码中发生分组丢失时，在不增加算法延迟的情况下恢复音频质量。用于对音频信号进行编码的音频信号传输装置包括对音频信号进行编码的音频编码单元和从预览信号计算和编码侧信息的侧信息编码单元。另一方面，用于解码音频代码并输出音频信号的音频信号接收装置包括：音频代码缓冲器，其基于音频分组的接收状态来检测分组丢失;音频参数解码单元，当音频代码缓冲器正确地接收音频数据包;边信息解码单元，当正确接收到音频数据包时对侧信息码进行解码;侧信息存储单元，累积通过解码侧信息码获得的副信息;音频参数缺失处理单元，在检测到音频分组丢失时输出音频参数，以及音频合成单元，其从音频参数合成解码的音频。

9. 发明公开

EP2795613A4 VERY SHORT PITCH DETECTION AND CODING 有权转让
标题翻译： ERKENNUNG UND CODIERUNG VON SEHR KURZERLÄNGSNEIGUNG
公开(公告)号：EP2795613A4
公开(公告)日：2015-04-29
申请号：EP12860799
申请日：2012-12-21
申请人： HUAWEI TECH CO LTD
发明人： GAO YANG
IPC分类号： G10L25/90
CPC分类号： G10L21/003 , G10L19/00 , G10L19/09 , G10L25/06 , G10L25/21 , G10L25/90
摘要： System and method embodiments are provided for very short pitch detection and coding for speech or audio signals. The system and method include detecting whether there is a very short pitch lag in a speech or audio signal that is shorter than a conventional minimum pitch limitation using a combination of time domain and frequency domain pitch detection techniques. The pitch detection techniques include using pitch correlations in time domain and detecting a lack of low frequency energy in the speech or audio signal in frequency domain. The detected very short pitch lag is coded using a pitch range from a predetermined minimum very short pitch limitation that is smaller than the conventional minimum pitch limitation.
摘要翻译：系统和方法实施例被提供用于语音或音频信号的非常短的音调检测和编码。该系统和方法包括使用时域和频域音调检测技术的组合来检测语音或音频信号中是否存在比常规的最小音调限制短的音调滞后。音调检测技术包括在时域中使用音调相关性，并检测频域中语音或音频信号中缺少低频能量。检测到的非常短的音调滞后是使用比传统的最小间距限制小的预定的最小非常短的间距限制的音调范围进行编码的。

10. 发明授权

EP1834322B1 VERFAHREN ZUM CODIEREN EINES ANALOGEN SIGNALS 有权转让
标题翻译：方法进行编码的模拟信号
公开(公告)号：EP1834322B1
公开(公告)日：2015-02-18
申请号：EP05815885.8
申请日：2005-12-05
申请人： Unify GmbH & Co. KG
发明人： BAUER, Wolfgang , SCHANDL, Stefan
IPC分类号： G10L19/09
CPC分类号： G10L19/09

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