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1. 发明公开

EP4350694A3 METHOD FOR PROCESSING LOST FRAME, AND DECODER 审中-公开
公开(公告)号：EP4350694A3
公开(公告)日：2024-06-12
申请号：EP24158654.4
申请日：2014-01-07
申请人： Crystal Clear Codec, LLC , Crystal Clear Codec spólka z o.o.
发明人： WANG, Bin , MIAO, Lei , LIU, Zexin
IPC分类号： H04L1/00 , G10L19/005
CPC分类号： G10L19/005
摘要： Embodiments of the present invention provide a method for processing a lost frame, and a decoder. The method includes: determining a synthesized high frequency band signal of a current lost frame; determining recovery information that corresponds to the current lost frame, where the recovery information includes at least one of the following: a coding mode before frame loss, a frame class of a last frame received before the frame loss, and a quantity of continuously lost frames, where the quantity of continuously lost frames is a quantity of frames that are continuously lost until the current lost frame; determining a global gain gradient of the current lost frame according to the recovery information; determining a global gain of the current lost frame according to the global gain gradient and a global gain of each frame in previous M frames of the current lost frame; and adjusting the synthesized high frequency band signal of the current lost frame according to the global gain of the current lost frame and a subframe gain of the current lost frame, to obtain a high frequency band signal of the current lost frame. The embodiments of the present invention enable transition of a high frequency band signal of a current lost frame to be natural and smooth, and can attenuate noise in the high frequency band signal, thereby improving quality of the high frequency band signal.

2. 发明公开

EP4369338A1 IMPROVED POWER GAINS AND CAPACITY GAINS FOR A RELAXED FRAME ERASURE RATE 审中-公开
公开(公告)号：EP4369338A1
公开(公告)日：2024-05-15
申请号：EP23211150.0
申请日：2016-09-23
申请人： QUALCOMM Incorporated
发明人： RAJENDRAN, Vivek , SINDER, Daniel Jared , ATTI, Venkatraman , TAVILDAR, Saurabha , LEUNG, Nikolai , HEIDARI, Alireza
IPC分类号： G10L19/22 , G10L19/005 , H04L45/128 , H04L47/2416 , H04L47/10 , H04L47/32 , H04L65/1069 , H04L65/65 , H04L65/752 , H04L65/80 , H04W52/02
CPC分类号： G10L19/22 , H04L47/32 , G10L19/005 , H04L45/128 , H04L47/2416 , H04L65/1069 , H04L65/80 , H04L47/29 , H04W52/0203 , Y02D30/70 , H04L65/65 , H04L65/752
摘要： A method of controlling frame transmissions includes determining, at a first device, a frame erasure rate for a communication session between the first device and at least a second device. The method also includes comparing the frame erasure rate to an erasure threshold. The method further includes discarding an active speech frame if the frame erasure rate satisfies the erasure threshold.

3. 发明公开

EP4360088A1 APPARATUS AND METHOD FOR REMOVING UNDESIRED AUDITORY ROUGHNESS 审中-实审
公开(公告)号：EP4360088A1
公开(公告)日：2024-05-01
申请号：EP21782487.9
申请日：2021-09-20
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： DISCH, Sascha , VAN DE PAR, Steven , NIEDERMEIER, Andreas , EDLER, Bernd
IPC分类号： G10L19/26 , G10L19/005 , G10L19/02 , G10L21/003 , G10L21/0316
CPC分类号： G10L21/0316 , G10L19/005 , G10L19/02 , G10L19/26 , G10L21/003

4. 发明公开

EP4322159A3 METHOD AND APPARTUS FOR CONTROLLING AUDIO FRAME LOSS CONCEALMENT 审中-实审
公开(公告)号：EP4322159A3
公开(公告)日：2024-04-17
申请号：EP23202489.3
申请日：2014-01-22
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Bruhn, Stefan , Svedberg, Jonas
IPC分类号： G10L19/005
CPC分类号： G10L19/005
摘要： Disclosed is a method and an apparatus for controlling a concealment method for a lost audio frame of a received audio signal. The method comprises analyzing a previously received audio signal to detect a condition for which the substitution of a lost frame provides relatively reduced quality. The method comprises modifying the concealment method by selectively adjusting a phase or a spectrum magnitude of a substitution frame spectrum in response to detecting said condition.

5. 发明公开

EP4350694A2 METHOD FOR PROCESSING LOST FRAME, AND DECODER 审中-实审
公开(公告)号：EP4350694A2
公开(公告)日：2024-04-10
申请号：EP24158654.4
申请日：2014-01-07
申请人： Crystal Clear Codec, LLC , Crystal Clear Codec spólka z o.o.
发明人： WANG, Bin , MIAO, Lei , LIU, Zexin
IPC分类号： G10L19/005
摘要： Embodiments of the present invention provide a method for processing a lost frame, and a decoder. The method includes: determining a synthesized high frequency band signal of a current lost frame; determining recovery information that corresponds to the current lost frame, where the recovery information includes at least one of the following: a coding mode before frame loss, a frame class of a last frame received before the frame loss, and a quantity of continuously lost frames, where the quantity of continuously lost frames is a quantity of frames that are continuously lost until the current lost frame; determining a global gain gradient of the current lost frame according to the recovery information; determining a global gain of the current lost frame according to the global gain gradient and a global gain of each frame in previous M frames of the current lost frame; and adjusting the synthesized high frequency band signal of the current lost frame according to the global gain of the current lost frame and a subframe gain of the current lost frame, to obtain a high frequency band signal of the current lost frame. The embodiments of the present invention enable transition of a high frequency band signal of a current lost frame to be natural and smooth, and can attenuate noise in the high frequency band signal, thereby improving quality of the high frequency band signal.

6. 发明公开

EP4297025A1 AUDIO SIGNAL ENHANCEMENT METHOD AND APPARATUS, COMPUTER DEVICE, STORAGE MEDIUM, AND COMPUTER PROGRAM PRODUCT 审中-实审
公开(公告)号：EP4297025A1
公开(公告)日：2023-12-27
申请号：EP22794615.9
申请日：2022-04-15
申请人： Tencent Technology (Shenzhen) Company Limited
发明人： WANG, Meng , HUANG, Qingbo , XIAO, Wei
IPC分类号： G10L19/005 , G10L21/02
摘要： This application relates to an audio signal enhancement method, performed by a computer device. The method including: decoding received speech packets sequentially to obtain a residual signal, long term filtering parameters and linear filtering parameters; filtering the residual signal to obtain an audio signal (S302); extracting, in a case that the audio signal is a feedforward error correction frame signal, feature parameters from the audio signal (S304); converting the audio signal into a filter speech excitation signal based on the linear filtering parameters obtained by decoding the speech packet (S306); performing speech enhancement on the filter speech excitation signal according to the feature parameters, and the long term filtering parameters and the linear filtering parameters obtained by decoding the speech packet to obtain an enhanced speech excitation signal (S308); and performing speech synthesis based on the enhanced speech excitation signal and the linear filtering parameters to obtain a speech enhanced signal (S310).

7. 发明公开

EP4152316A1 AUDIO DECODER SUPPORTING A SET OF DIFFERENT LOSS CONCEALMENT TOOLS 审中-实审
公开(公告)号：EP4152316A1
公开(公告)日：2023-03-22
申请号：EP22202282.4
申请日：2018-11-05
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Tomasek, Adrian , Ravelli, Emmanuel , Schnell, Markus , Tschekalinskij, Alexander , Schnabel, Michael , Sperschneider, Ralph
IPC分类号： G10L19/005 , G10L19/028
摘要： An assignment of one of phase set of different loss concealment tools of an audio decoder to a portion of the audio signal to be decoded from a data stream, which portion is affected by loss, that is the selection out of the set of different loss concealment tools, may be made in a manner leading to a more pleasant loss concealment if the assignment/selection is done based on two measures: A first measure which is determined measures a spectral position of a spectral centroid of a spectrum of the audio signal and a second measure which is determined measures a temporal predictability of the audio signal. The assigned or selected loss concealment tool may then be used to recover the portion of the audio signal.

8. 发明授权

EP3618066B1 ENCODER, DECODER AND METHOD FOR ENCODING AND DECODING AUDIO CONTENT USING PARAMETERS FOR ENHANCING A CONCEALMENT 有权转让
公开(公告)号：EP3618066B1
公开(公告)日：2022-06-22
申请号：EP19202304.2
申请日：2015-08-24
发明人： LECOMTE, Jérémie , SCHUBERT, Benjamin , SCHNABEL, Michael , DIETZ, Martin
IPC分类号： G10L19/005 , G10L19/02 , G10L19/20 , G10L19/083 , G10L19/24

9. 发明公开

EP3984026A1 TIME REVERSED AUDIO SUBFRAME ERROR CONCEALMENT 审中-公开
公开(公告)号：EP3984026A1
公开(公告)日：2022-04-20
申请号：EP20728023.1
申请日：2020-05-25
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： NORVELL, Erik , MORADI ASHOUR, Chamran
IPC分类号： G10L19/005 , G10L19/022

10. 发明授权

EP3859734B1 SOUND SIGNAL DECODING DEVICE, SOUND SIGNAL DECODING METHOD, PROGRAM AND RECORDING MEDIUM 有权
公开(公告)号：EP3859734B1
公开(公告)日：2022-01-26
申请号：EP21158838.9
申请日：2015-03-16
发明人： MORIYA, Takehiro , KAMAMOTO, Yutaka , HARADA, Noboru
IPC分类号： G10L19/07 , G10L19/00 , G10L19/005

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