公开(公告)号：EP4398244A3

公开(公告)日：2024-07-31

申请号：EP24167817.6

申请日：2011-07-07

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： LECOMTE, Jérémie ,  WARMBOLD, Patrick ,  BAYER, Stefan

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

CPC分类号： G10L19/005 ,  G10L19/0212 ,  G10L19/20 ,  G10L19/04

摘要： A codec supporting switching between time-domain aliasing cancellation transform coding mode and time-domain coding mode is made less liable to frame loss by adding a further syntax portion to the frames, depending on which the parser of the decoder may select between a first action of expecting the current frame to comprise, and thus reading forward aliasing cancellation data from the current frame and a second action of not-expecting the current frame to comprise, and thus not reading forward aliasing cancellation data from the current frame. In other words, while a bit of coding efficiency is lost due to the provision of the new syntax portion, it is merely the new syntax portion which provides for the ability to use the codec in case of a communication channel with frame loss. Without the new syntax portion, the decoder would not be capable of decoding any data stream portion after a loss and will crash in trying to resume parsing. Thus, in an error prone environment, the coding efficiency is prevented from vanishing by the introduction of the new syntax portion.

公开(公告)号：EP4372742A3

公开(公告)日：2024-07-31

申请号：EP24167822.6

申请日：2011-07-07

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： LECOMTE, Jérémie ,  WARMBOLD, Patrick ,  BAYER, Stefan

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

CPC分类号： G10L19/005 ,  G10L19/0212 ,  G10L19/20 ,  G10L19/04

摘要： A codec supporting switching between time-domain aliasing cancellation transform coding mode and time-domain coding mode is made less liable to frame loss by adding a further syntax portion to the frames, depending on which the parser of the decoder may select between a first action of expecting the current frame to comprise, and thus reading forward aliasing cancellation data from the current frame and a second action of not-expecting the current frame to comprise, and thus not reading forward aliasing cancellation data from the current frame. In other words, while a bit of coding efficiency is lost due to the provision of the new syntax portion, it is merely the new syntax portion which provides for the ability to use the codec in case of a communication channel with frame loss. Without the new syntax portion, the decoder would not be capable of decoding any data stream portion after a loss and will crash in trying to resume parsing. Thus, in an error prone environment, the coding efficiency is prevented from vanishing by the introduction of the new syntax portion.

公开(公告)号：EP4398248A2

公开(公告)日：2024-07-10

申请号：EP24167821.8

申请日：2011-07-07

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： LECOMTE, Jérémie ,  WARMBOLD, Patrick ,  BAYER, Stefan

IPC分类号： G10L19/02

CPC分类号： G10L19/005 ,  G10L19/0212 ,  G10L19/20 ,  G10L19/04

摘要： A codec supporting switching between time-domain aliasing cancellation transform coding mode and time-domain coding mode is made less liable to frame loss by adding a further syntax portion to the frames, depending on which the parser of the decoder may select between a first action of expecting the current frame to comprise, and thus reading forward aliasing cancellation data from the current frame and a second action of not-expecting the current frame to comprise, and thus not reading forward aliasing cancellation data from the current frame. In other words, while a bit of coding efficiency is lost due to the provision of the new syntax portion, it is merely the new syntax portion which provides for the ability to use the codec in case of a communication channel with frame loss. Without the new syntax portion, the decoder would not be capable of decoding any data stream portion after a loss and will crash in trying to resume parsing. Thus, in an error prone environment, the coding efficiency is prevented from vanishing by the introduction of the new syntax portion.

公开(公告)号：EP4358082A1

公开(公告)日：2024-04-24

申请号：EP24160714.2

申请日：2010-10-19

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  VoiceAge Corporation ,  Koninklijke Philips N.V. ,  Dolby International AB

发明人： BESSETTE, Bruno ,  NEUENDORF, Max ,  GEIGER, Ralf ,  GOURNAY, Philippe ,  LEFEBVRE, Roch ,  GRILL, Bernhard ,  LECOMTE, Jérémie ,  BAYER, Stefan ,  RETTELBACH, Nikolaus ,  VILLEMOES, Lars ,  SALAMI, Redwan ,  DEN BRINKER, Albertus C.

IPC分类号： G10L19/18 ,  G10L19/02 ,  G10L19/04 ,  G10L19/03 ,  G10L19/12 ,  G10L19/20

CPC分类号： G10L19/0212 ,  G10L19/03 ,  G10L19/20 ,  G10L19/18 ,  G10L19/04 ,  G10L19/12

摘要： An audio signal decoder (200) for providing a decoded representation (212) of an audio content on the basis of an encoded representation (310) of the audio content comprises a transform domain path (230, 240, 242, 250, 260) configured to obtain a time-domain representation (212) of a portion of the audio content encoded in a transform-domain mode on the basis of a first set (220) of spectral coefficients, a representation (224) of an aliasing-cancellation stimulus signal and a plurality of linear-prediction-domain parameters (222). The transform domain path comprises a spectrum processor (230) configured to apply a spectrum shaping to the first set of spectral coefficients in dependence on at least a subset of the linear-prediction-domain parameters, to obtain a spectrally-shaped version (232) of the first set of spectral coefficients. The transform domain path comprises a first frequency-domain-to-time-domain converter (240) configured to obtain a time-domain representation of the audio content on the basis of the spectrally-shaped version of the first set of spectral coefficients. The transform domain path comprises an aliasing-cancellation stimulus filter configured to filter (250) the aliasing-cancellation stimulus signal (324) in dependence on at least a subset of the linear-prediction-domain parameters (222), to derive an aliasing-cancellation synthesis signal (252) from the aliasing-cancellation stimulus signal. The transform domain path also comprises a combiner (260) configured to combine the time-domain representation (242) of the audio content with the aliasing-cancellation synthesis signal (252), or a post-processed version thereof, to obtain an aliasing reduced time-domain signal.

公开(公告)号：EP3427258A1

公开(公告)日：2019-01-16

申请号：EP17708528.9

申请日：2017-03-03

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： LECOMTE, Jérémie ,  TOMASEK, Adrian

IPC分类号： G10L19/005

公开(公告)号：EP3427256A1

公开(公告)日：2019-01-16

申请号：EP16725134.7

申请日：2016-05-25

申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.

发明人： LECOMTE, Jérémie ,  TOMASEK, Adrian

IPC分类号： G10L19/005

摘要： Embodiments of the invention relate to an error concealment unit for providing an error concealment audio information for concealing a loss of an audio frame in an encoded audio information. The error concealment unit provides a first error concealment audio information component for a first frequency range using a frequency domain concealment. The error concealment unit also provides a second error concealment audio information component for a second frequency range, which includes lower frequencies than the first frequency range, using a time domain concealment. The error concealment unit also combines the first error concealment audio information component and the second error concealment audio information component, to obtain the error concealment audio information. Other embodiments of the invention relate to a decoder including the error concealment unit, as well as related encoders, methods, and computer programs for decoding and/or concealing.

公开(公告)号：EP3011555B1

公开(公告)日：2018-03-28

申请号：EP14730172.5

申请日：2014-06-16

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： LECOMTE, Jérémie ,  SCHNABEL, Michael ,  MARKOVIC, Goran ,  DIETZ, Martin ,  NEUGEBAUER, Bernhard

IPC分类号： G10L19/005 ,  G10L19/08 ,  G10L19/107

CPC分类号： G10L19/005 ,  G10L19/08 ,  G10L19/107 ,  G10L19/12 ,  G10L2019/0002 ,  G10L2019/0008

摘要： An apparatus for reconstructing a frame including a speech signal as a reconstructed frame is provided, the apparatus including a determination unit and a frame reconstructor being configured to reconstruct the reconstructed frame, such that the reconstructed frame completely or partially includes the first reconstructed pitch cycle, such that the reconstructed frame completely or partially includes a second reconstructed pitch cycle, and such that the number of samples of the first reconstructed pitch cycle differs from a number of samples of the second reconstructed pitch cycle.

公开(公告)号：EP3063759B1

公开(公告)日：2017-12-20

申请号：EP14789568.4

申请日：2014-10-27

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： LECOMTE, Jérémie

IPC分类号： G10L19/005 ,  G10L25/90 ,  G10L19/08 ,  G10L19/02

CPC分类号： G10L19/125 ,  G10L19/005 ,  G10L19/012 ,  G10L19/0212 ,  G10L19/022 ,  G10L19/038 ,  G10L19/08 ,  G10L19/12 ,  G10L19/26 ,  G10L25/90

摘要： An audio decoder for providing a decoded audio information on the basis of an encoded audio information. The audio decoder has an error concealment configured to provide an error concealment audio information for concealing a loss of an audio frame, wherein the error concealment is configured to modify a time domain excitation signal obtained for one or more audio frames preceding a lost audio frame, in order to obtain the error concealment audio information.

公开(公告)号：EP3063760A1

公开(公告)日：2016-09-07

申请号：EP14790073.2

申请日：2014-10-27

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： LECOMTE, Jérémie ,  MARKOVIC, Goran ,  SCHNABEL, Michael ,  PIETRZYK, Grzegorz

IPC分类号： G10L19/005 ,  G10L25/90 ,  G10L19/08 ,  G10L19/02

CPC分类号： G10L19/005 ,  G10L19/02 ,  G10L19/08 ,  G10L19/09 ,  G10L19/125 ,  G10L2019/0011

摘要： An audio decoder (100; 300) for providing a decoded audio information (112; 312) on the basis of an encoded audio information (110; 310) comprises an error concealment (130; 380; 500) configured to provide an error concealment audio information (132; 382; 512) for concealing a loss of an audio frame following an audio frame encoded in a frequency domain representation (322) using a time domain excitation signal (532).

摘要翻译： 用于提供已编码音频信息的基础上解码的音频信息的音频解码器包括在被配置为提供到错误隐藏音频信息用于隐藏的音频帧的丢失对使用时间中的频域表示编码的音频帧按照错误隐藏 域激励信号。

公开(公告)号：EP2959481A1

公开(公告)日：2015-12-30

申请号：EP14706528.8

申请日：2014-02-20

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： HELMRICH, Christian ,  LECOMTE, Jérémie ,  MARKOVIC, Goran ,  SCHNELL, Markus ,  EDLER, Bernd ,  REUSCHL, Stefan

IPC分类号： G10L19/025

CPC分类号： G10L19/025 ,  G10L19/0212 ,  G10L19/022 ,  H04N19/172 ,  H04N19/176 ,  H04N19/44

摘要： An apparatus for generating an encoded signal, comprises: a window sequence controller (808) for generating a window sequence information (809) for windowing an audio or image signal, the window sequence information indicating a first window (1500) for generating a first frame of spectral values, a second window function (1502) and at least one third window function (1503) for generating a second frame of spectral values, wherein the first window function (1500), the second window function (1502) and the one or more third window functions overlap within a multi-overlap region (1300); a preprocessor (802) for windowing (902) a second block of samples corresponding to the second window function and the at least one third window functions using an auxiliary window function (1 100) to obtain a second block of windowed samples, and for preprocessing (904) the second block of windowed samples using a folding-in operation of a portion of the second block overlapping with a first block into the multi-overlap portion (1300) to obtain a preprocessed second block of windowed samples having a modified multi-overlap portion; a spectrum converter (804) for applying an aliasing-introducing transform (906) to the first block of samples using the first window function to obtain the first frame of spectral values, for applying the aliasing introducing transform to a first portion of the preprocessed second block of windowed samples using the second window function to obtain a first portion of spectral samples of a second frame and for applying the aliasing introducing transform to a second portion of the preprocessed second block of windowed samples using the one or more third window functions (1503) to obtain a second portion of spectral samples of the second frame; and a processor (806) for processing the first frame and the second frame to obtain encoded frames of the audio or image signal.

摘要翻译： 为编码信号的生成的装置，包括：用于产生一个窗口序列信息用于音频或图像信号的窗口的窗口序列控制器，所述窗序列信息，其指示第一窗口，用于产生频谱值的第一帧，第二窗函数，并在 用于产生频谱值的第二帧，所述worin第一窗函数，所述第二窗口函数和一个或多个第三窗函数的多重叠区域内重叠至少一个第三窗函数; 加窗相应于第二窗口函数的样本的第二块，并使用辅助窗函数的获得加窗采样的第二块中，频谱转换器，用于施加到混叠引入变换至少一个第三窗口函数的预处理器; 以及用于处理所述第一帧和所述第二帧中的处理器来获取编码的音频或图象信号的帧。