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1. 发明申请

WO2015174912A1 AUDIO SIGNAL CLASSIFICATION AND CODING 审中-公开
标题翻译：音频信号分类和编码
公开(公告)号：WO2015174912A1
公开(公告)日：2015-11-19
申请号：PCT/SE2015/050531
申请日：2015-05-12
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： NORVELL, Erik , BRUHN, Stefan
IPC分类号： G10L25/18 , G10L19/20
CPC分类号： G10L19/20 , G10L25/18
摘要： The invention relates to a codec and a signal classifier and methods therein for signal classification and selection of a coding mode based on audio signal characteristics. A method embodiment to be performed by a decoder comprises, for a frame m: determining a stability value D(m) based on a difference, in a transform domain, between a range of a spectral envelope of frame m and a corresponding range of a spectral envelope of an adjacent frame m-1. Each such range comprises a set of quantized spectral envelope values related to the energy in spectral bands of a segment of the audio signal. The method further comprises selecting a decoding mode, out of a plurality of decoding modes, based on the stability value D(m); and applying the selected decoding mode.
摘要翻译：本发明涉及一种编解码器和信号分类器及其方法，用于信号分类和基于音频信号特性的编码模式的选择。由解码器执行的方法实施例包括：对于帧m：在变换域中，在帧m的频谱包络的范围和相应的范围a之间，基于差异确定稳定性值D（m）相邻帧m-1的频谱包络。每个这样的范围包括与音频信号的段的频谱带中的能量相关的一组量化频谱包络值。该方法还包括基于稳定性值D（m）从多个解码模式中选择解码模式; 以及应用所选择的解码模式。

2. 发明申请

WO2015080658A1 HYBRID RTP PAYLOAD FORMAT 审中-公开
公开(公告)号：WO2015080658A1
公开(公告)日：2015-06-04
申请号：PCT/SE2014/051412
申请日：2014-11-27
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： BRUHN, Stefan
IPC分类号： H04L29/06
CPC分类号： G10L19/167 , H04L65/607 , H04L65/608 , H04L69/04 , H04L69/22
摘要： In accordance with an example embodiment of the present invention, disclosed is a method and an apparatus thereof for formatting a payload for transmission of multi-mode speech/audio codec data. The method comprises deciding whether a header-less or a header-full payload format is used for transmission of a coded frame. The decision is based on a codec mode and a required functionality. The payload data is packetized with or without the payload header depending on the decision.
摘要翻译：根据本发明的示例实施例，公开了一种用于格式化用于多模式语音/音频编解码器数据的传输的有效载荷的方法和装置。该方法包括确定是否使用无报头或报头全部有效载荷格式来传输编码帧。该决定基于编解码器模式和所需功能。取决于决定，有效载荷数据与有效载荷报头分组化。

3. 发明申请

WO2014123469A1 ENHANCED AUDIO FRAME LOSS CONCEALMENT 审中-公开
标题翻译：增强音频帧丢失隐藏
公开(公告)号：WO2014123469A1
公开(公告)日：2014-08-14
申请号：PCT/SE2014/050066
申请日：2014-01-22
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： BRUHN, Stefan
IPC分类号： G10L19/005
CPC分类号： G10L19/005 , G10L19/04 , G10L25/69
摘要： Concealing a lost audio frame of a received audio signal by performing a sinusoidal analysis (81) of a part of a previously received or reconstructed audio signal, wherein the sinusoidal analysis involves identifying frequencies of sinusoidal components of the audio signal, applying a sinusoidal model on a segment of the previously received or reconstructed audio signal, wherein said segment is used as a prototype frame in order to create a substitution frame for a lost audio frame, and creating the substitution frame (84) for the lost audio frame by time-evolving sinusoidal components of the prototype frame, up to the time instance of the lost audio frame, in response to the corresponding identified frequencies. The method further comprising performing (82)at least one of an enhanced frequency estimation and an adaptation of the creating of the substitution frame in response to the tonality of the audio signal.
摘要翻译：通过执行先前接收或重构的音频信号的一部分的正弦分析（81）来隐藏接收的音频信号的丢失的音频帧，其中正弦分析涉及识别音频信号的正弦分量的频率，将正弦模型应用于先前接收或重构的音频信号的段，其中所述段用作原型帧，以便为丢失的音频帧创建替换帧，并且通过时间演变为丢失的音频帧创建替换帧（84）响应于相应的识别频率，原型帧的正弦分量，直到丢失音频帧的时间实例。所述方法还包括：响应于音频信号的音调，执行（82）增强频率估计和替换帧的创建中的至少一个。

4. 发明申请

WO2014123471A1 METHOD AND APPARATUS FOR CONTROLLING AUDIO FRAME LOSS CONCEALMENT 审中-公开
标题翻译：用于控制音频帧丢失隐藏的方法和装置
公开(公告)号：WO2014123471A1
公开(公告)日：2014-08-14
申请号：PCT/SE2014/050068
申请日：2014-01-22
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： BRUHN, Stefan , SVEDBERG, Jonas
IPC分类号： G10L19/005
CPC分类号： G10L19/005 , G10L19/0017 , G10L19/0204 , G10L19/025 , G10L25/45
摘要： In accordance with an example embodiment of the present invention, disclosed is a method and an apparatus thereof for controlling a concealment method for a lost audio frame of a received audio signal. A method for a decoder of concealing a lost audio frame comprises detecting in a property of the previously received and reconstructed audio signal, or in a statistical property of observed frame losses, a condition for which the substitution of a lost frame provides relatively reduced quality. In case such a condition is detected, the concealment method is modified by selectively adjusting a phase or a spectrum magnitude of a substitution frame spectrum.
摘要翻译：根据本发明的示例实施例，公开了一种用于控制接收到的音频信号的丢失音频帧的隐藏方法的方法和装置。用于隐藏丢失音频帧的解码器的方法包括：检测先前接收和重构的音频信号的属性，或以观察到的帧丢失的统计特性，丢失帧的替换提供相对降低的质量的条件。在检测到这种情况的情况下，通过选择性地调整替代帧频谱的相位或频谱幅度来修改隐藏方法。

5. 发明申请

WO2012008891A1 AUDIO ENCODER AND DECODER AND METHODS FOR ENCODING AND DECODING AN AUDIO SIGNAL 审中-公开
标题翻译：音频编码器和解码器以及编码和解码音频信号的方法
公开(公告)号：WO2012008891A1
公开(公告)日：2012-01-19
申请号：PCT/SE2010/050852
申请日：2010-07-16
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , NORVELL, Erik , BRUHN, Stefan , POBLOTH, Harald
发明人： NORVELL, Erik , BRUHN, Stefan , POBLOTH, Harald
IPC分类号： G10L19/12
CPC分类号： G10L19/13 , G10L19/038 , G10L19/06 , G10L19/12 , G10L2019/0002 , G10L2019/0005
摘要： The present invention relates to a frequency domain based method of encoding and decoding an audio signal, wherein an adaptive spectral code book is updated with synthesized frequency domain representations of a time domain signal segment. A frequency analysis is performed of a received time domain signal segment in order to obtain a frequency domain representation, and the adaptive spectral code book is searched for a first approximation of the frequency domain representation. A fixed spectral code book is searched for an approximation of the residual frequency representation. A synthesized frequency domain representation may be generated from the two approximations.
摘要翻译：本发明涉及一种基于频域编码和解码音频信号的方法，其中用时域信号段的合成频域表示更新自适应频谱码本。对接收到的时域信号段执行频率分析以获得频域表示，并且搜索自适应频谱代码簿以进行频域表示的第一近似。搜索固定频谱代码簿以获得残差频率表示的近似值。可以从两个近似生成合成的频域表示。

6. 发明申请

WO2009157824A1 MULTI-MODE SCHEME FOR IMPROVED CODING OF AUDIO 审中-公开
标题翻译：用于改进音频编码的多模式方案
公开(公告)号：WO2009157824A1
公开(公告)日：2009-12-30
申请号：PCT/SE2008/050758
申请日：2008-06-24
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (publ) , GRANCHAROV, Volodya , BRUHN, Stefan , POBLOTH, Harald
发明人： GRANCHAROV, Volodya , BRUHN, Stefan , POBLOTH, Harald
IPC分类号： G10L19/00 , G10L21/02
CPC分类号： G10L19/22
摘要： The present invention relates to an improved scheme for coding of audio. In particular, the present invention relates to an encoder device and a method for coding an input signal in an encoder system. The method comprises applying a first mode to the input signal to form a first output and applying asecond mode to the input signal to form a second output. A first processed output is then formed from at least a part of the first output, and a second processed output is formed from at least a part of the second output. Forming a second processed output comprises estimating a part of the input signal from at least a part of the second output. Then, an optimum mode is determined based on the firstprocessedoutput and the secondprocessedoutput, and the output according to the optimum mode is selected.
摘要翻译：本发明涉及用于音频编码的改进方案。具体而言，本发明涉及编码器装置和编码器系统中的输入信号编码方法。该方法包括将第一模式应用于输入信号以形成第一输出并将第二模式应用于输入信号以形成第二输出。然后从第一输出的至少一部分形成第一处理输出，并且从第二输出的至少一部分形成第二处理输出。形成第二处理输出包括从第二输出的至少一部分估计输入信号的一部分。然后，基于第一处理输出和第二处理输出确定最佳模式，并且选择根据最佳模式的输出。

7. 发明公开

EP2959480A1 METHODS AND APPARATUSES FOR DTX HANGOVER IN AUDIO CODING 有权
标题翻译：方法和DTX释放延迟器件的声音编码
公开(公告)号：EP2959480A1
公开(公告)日：2015-12-30
申请号：EP13818850.3
申请日：2013-12-12
申请人： Telefonaktiebolaget L M Ericsson (Publ)
发明人： BRUHN, Stefan , JANSSON TOFTGÅRD, Tomas , SEHLSTEDT, Martin
IPC分类号： G10L19/012
CPC分类号： G10L19/012 , G10L25/84
摘要： Transmitting node and receiving node for audio coding and methods therein. The nodes being operable to encode/decode speech and to apply a discontinuous transmission (DTX) scheme comprising transmission/reception of Silence Insertion Descriptor (SID) frames during speech inactivity. The method in the transmitting node comprising determining, from amongst a number N of hangover frames, a set Y of frames being representative of background noise, and further transmitting the N hangover frames, comprising at least said set Y of frames, to the receiving node. The method further comprises transmitting a first SID frame to the receiving node in association with the transmission of the N hangover frames, where the SID frame comprises information indicating the determined set Y of hangover frames to the receiving node. The method enables the receiving node to generate comfort noise based on the hangover frames most adequate for the purpose.

8. 发明公开

EP2945158A1 METHOD AND ARRANGEMENT FOR SMOOTHING OF STATIONARY BACKGROUND NOISE 有权
标题翻译：平稳背景噪声平滑的方法和布置
公开(公告)号：EP2945158A1
公开(公告)日：2015-11-18
申请号：EP15175006.4
申请日：2008-02-13
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： BRUHN, Stefan
IPC分类号： G10L19/08 , G10L19/04 , G10L19/12 , G10L19/02 , G10L21/00 , G10L19/26
摘要： In a method of smoothing background noise in a telecommunication speech session receiving and decoding a coded speech signal and subsequently, determining LPC parameters and an excitation signal for the received signal. Thereafter, synthesizing and outputting an output signal based on the determined LPC parameters and excitation signal. In addition, smoothing the determined set of LPC parameters by providing a low pass filtered set of LPC parameters and modifying the determined excitation signal by reducing power and spectral fluctuations of the excitation signal during periods of speech inactivity.
摘要翻译：在平滑电信语音会话中的背景噪声的方法中，接收和解码编码语音信号并且随后确定接收信号的LPC参数和激励信号。此后，基于所确定的LPC参数和激励信号来合成并输出输出信号。另外，通过提供经低通滤波的一组LPC参数来平滑所确定的一组LPC参数，并且通过降低在不活动时段期间激励信号的功率和频谱波动来修改所确定的激励信号。

9. 发明公开

EP2399395A1 SYSTEMS AND METHOD FOR ENABLING FAST CHANNEL SWITCHING 审中-公开
标题翻译：系统和方法，快速频道切换开启时会
公开(公告)号：EP2399395A1
公开(公告)日：2011-12-28
申请号：EP09840500.4
申请日：2009-02-17
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： BRUHN, Stefan , SKILLERMARK, Per , ALMGREN, Magnus
IPC分类号： H04N7/50 , H04N7/173
CPC分类号： H04N7/173 , H04N21/234327 , H04N21/4384
摘要： The invention provides a method for enabling fast channel switching. In some embodiments, this method includes: (1) using an encoder to encode input data to produce a base layer and one or more enhancement layers; (2) transmitting an enhancement layer packet comprising enhancement layer information corresponding to a first temporal unit of the input data; and (3) transmitting a base layer packet comprising base layer information corresponding to a second temporal unit of the input data and being decodable by a decoder to produce audio/video data having a first quality, characterized in that the enhancement layer information can be decoded in combination with the base layer information to produce audio/video data having a higher quality than the first quality, and the first temporal unit is larger than the second temporal unit.

10. 发明公开

EP1327242A1 ERROR CONCEALMENT IN RELATION TO DECODING OF ENCODED ACOUSTIC SIGNALS 有权
标题翻译：相对于解码编码式声波信号的错误隐藏
公开(公告)号：EP1327242A1
公开(公告)日：2003-07-16
申请号：EP01963679.4
申请日：2001-09-07
申请人： Telefonaktiebolaget L M Ericsson (Publ)
发明人： BRUHN, Stefan
IPC分类号： G10L19/02
CPC分类号： G10L19/005
摘要： The present invention relates to the concealment of errors in decoded acoustic signals caused by encoded data representing the acoustic signals being partially lost or damaged during transmission over a transmission medium. In case of lost data or received damaged data a secondary reconstructed signal is produced on basis of a primary reconstructed signal. This signal has a spectrally adjusted spectrum (Z4E), such that it deviates less with respect spectral shape from a spectrum (Z¿3?) of a previously reconstructed signal produced from previously received data than a spectrum (Z'4) of the primary reconstructed signal.

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