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1. 发明授权

US06757654B1 Forward error correction in speech coding 有权
标题翻译：语音编码中的前向纠错
公开(公告)号：US06757654B1
公开(公告)日：2004-06-29
申请号：US09569312
申请日：2000-05-11
申请人： Magnus Westerlund , Anders Nohlgren , Jonas Svedberg , Anders Uvliden , Jim Sundqvist
发明人： Magnus Westerlund , Anders Nohlgren , Jonas Svedberg , Anders Uvliden , Jim Sundqvist
IPC分类号： G10L1302
CPC分类号： G10L19/005
摘要： An improved forward error correction (FEC) technique for coding speech data provides an encoder module which primary-encodes an input speech signal using a primary synthesis model to produce primary-encoded data, and redundant-encodes the input speech signal using a redundant synthesis model to produce redundant-encoded data. A packetizer combines the primary-encoded data and the redundant-encoded data into a series of packets and transmits the packets over a packet-based network, such as an Internet Protocol (IP) network. A decoding module primary-decodes the packets using the primary synthesis model, and redundant-decodes the packets using the redundant synthesis model. The technique provides interaction between the primary synthesis model and the redundant synthesis model during and after decoding to improve the quality of a synthesized output speech signal. Such “interaction,” for instance, may take the form of updating states in one model using the other model.
摘要翻译：用于编码语音数据的改进的前向纠错（FEC）技术提供了一种编码器模块，其使用主要合成模型对输入语音信号进行一次编码以产生初始编码数据，并且使用冗余合成模型对输入语音信号进行冗余编码以产生冗余编码数据。分组器将主编码数据和冗余编码数据组合成一系列分组，并通过诸如因特网协议（IP）网络的基于分组的网络传送分组。解码模块使用主合成模型对分组进行主要解码，并使用冗余合成模型对分组进行冗余解码。该技术在解码期间和之后提供主要合成模型和冗余合成模型之间的交互以提高合成输出语音信号的质量。例如，这种“交互”可以采用其他模型在一个模型中更新状态的形式。

2. 发明授权

US07146311B1 CELP encoding/decoding method and apparatus 有权
标题翻译： CELP编码/解码方法和装置
公开(公告)号：US07146311B1
公开(公告)日：2006-12-05
申请号：US09395909
申请日：1999-09-14
申请人： Anders Uvliden , Jonas Svedberg
发明人： Anders Uvliden , Jonas Svedberg
IPC分类号： G10L19/08
CPC分类号： G10L19/22 , G10L2019/0005
摘要： A multi-codebook fixed bitrate CELP signal block encoder/decoder includes a codebook selector (22) for selecting, for each signal block, a corresponding codebook identification in accordance with a deterministic selection procedure that is independent of signal type. Included are also means for encoding/decoding each signal block by using a codebook having the selected codebook identification.
摘要翻译：多码本固定位速率CELP信号块编码器/解码器包括码本选择器（22），用于根据独立于信号类型的确定性选择过程为每个信号块选择相应的码本识别。包括也是通过使用具有所选码本识别的码本来对每个信号块进行编码/解码的装置。

3. 发明申请

US20050096901A1 CELP encoding/decoding method and apparatus 有权
标题翻译： CELP编码/解码方法和装置
公开(公告)号：US20050096901A1
公开(公告)日：2005-05-05
申请号：US11007373
申请日：2004-12-08
申请人： Anders Uvliden , Jonas Svedberg
发明人： Anders Uvliden , Jonas Svedberg
IPC分类号： G10L19/22 , H03M7/30 , H03M7/36 , G10L19/04
CPC分类号： G10L19/22 , G10L2019/0005
摘要： A multi-codebook fixed bitrate CELP signal block encoder/decoder includes a codebook selector (22) for selecting, for each signal block, a corresponding codebook identification in accordance with a deterministic selection procedure that is independent of signal type. Included are also means for encoding/decoding each signal block by using a codebook having the selected codebook identification.
摘要翻译：多码本固定位速率CELP信号块编码器/解码器包括码本选择器（22），用于根据独立于信号类型的确定性选择过程为每个信号块选择相应的码本识别。包括也是通过使用具有所选码本识别的码本来对每个信号块进行编码/解码的装置。

4. 发明授权

US06424938B1 Complex signal activity detection for improved speech/noise classification of an audio signal 有权
标题翻译：用于改善音频信号的语音/噪声分类的复杂信号活动检测
公开(公告)号：US06424938B1
公开(公告)日：2002-07-23
申请号：US09434787
申请日：1999-11-05
申请人： Ingemar Johansson , Erik Ekudden , Jonas Svedberg , Anders Uvliden
发明人： Ingemar Johansson , Erik Ekudden , Jonas Svedberg , Anders Uvliden
IPC分类号： G10L1908
CPC分类号： G10L25/78 , G10L2025/783
摘要： Perceptually relevant non-speech information can be preserved during encoding of an audio signal by determining whether the audio signal includes such information. If so, a speech/noise classification of the audio signal is overriden to prevent misclassification of the audio signal as noise.
摘要翻译：通过确定音频信号是否包括这样的信息，可以在音频信号的编码期间保留感知相关的非语音信息。如果是这样，则音频信号的语音/噪声分类被覆盖以防止音频信号被错误地分类为噪声。

5. 发明授权

US07194408B2 CELP encoding/decoding method and apparatus 有权
标题翻译： CELP编码/解码方法和装置
公开(公告)号：US07194408B2
公开(公告)日：2007-03-20
申请号：US11007373
申请日：2004-12-08
申请人： Anders Uvliden , Jonas Svedberg
发明人： Anders Uvliden , Jonas Svedberg
IPC分类号： G10L19/08
CPC分类号： G10L19/22 , G10L2019/0005
摘要： A multi-codebook fixed bitrate CELP signal block encoder/decoder includes a codebook selector (22) for selecting, for each signal block, a corresponding codebook identification in accordance with a deterministic selection procedure that is independent of signal type. Included are also means for encoding/decoding each signal block by using a codebook having the selected codebook identification.
摘要翻译：多码本固定位速率CELP信号块编码器/解码器包括码本选择器（22），用于根据独立于信号类型的确定性选择过程为每个信号块选择相应的码本识别。包括也是通过使用具有所选码本识别的码本来对每个信号块进行编码/解码的装置。

6. 发明授权

US06275798B1 Speech coding with improved background noise reproduction 有权
标题翻译：具有改进的背景噪声再现的语音编码
公开(公告)号：US06275798B1
公开(公告)日：2001-08-14
申请号：US09154361
申请日：1998-09-16
申请人： Ingemar Johansson , Jonas Svedberg , Anders Uvliden
发明人： Ingemar Johansson , Jonas Svedberg , Anders Uvliden
IPC分类号： G10L1520
CPC分类号： G10L19/012 , G10L19/083
摘要： In producing an approximation of an original speech signal from encoded information about the original speech signal, current parameters associated with a current segment of the original speech signal are determined from the encoded information. Reproduction of a noise component of the original speech signal is improved by using at least one of the current parameters and corresponding previous parameters respectively associated with previous segments of the original speech signal to produce a modified parameter. The modified parameter is then used to produce an approximation of the current segment of the original speech signal.
摘要翻译：在从关于原始语音信号的编码信息产生原始语音信号的近似值时，根据编码信息确定与原始语音信号的当前段相关联的当前参数。通过使用分别与原始语音信号的先前片段相关联的当前参数和对应的先前参数中的至少一个来产生修改的参数来改进原始语音信号的噪声分量的再现。然后，修改的参数用于产生原始语音信号的当前段的近似。

7. 发明申请

US20050227657A1 Method and apparatus for increasing perceived interactivity in communications systems 审中-公开
标题翻译：增加通信系统中感知交互性的方法和装置
公开(公告)号：US20050227657A1
公开(公告)日：2005-10-13
申请号：US10819376
申请日：2004-04-07
申请人： Tomas Frankkila , Jonas Svedberg , Krister Svanbro , Bjorn Svensson , Tomas Jonsson
发明人： Tomas Frankkila , Jonas Svedberg , Krister Svanbro , Bjorn Svensson , Tomas Jonsson
IPC分类号： G10L13/06 , H04L12/56 , H04Q7/38
CPC分类号： G10L21/04
摘要： Perceived interactivity in user communications is achieved by reducing a perceived delay switching the active transmitter in the communication without having to reduce actual transmission and setup delays associated with a communication exchange. A sound signal is identified in the user communication. The sound signal is analyzed to identify or estimate a sound signal segment. The sound signal segment is preferably (though not necessarily) located at the beginning or the end of the sound signal. The sound signal segment may be selected directly from the sound signal itself, from a modified version of the sound signal, or from a signal associated with the sound signal. A determination is made that a length or duration of the sound signal segment should be or can be modified. One or more modifications for the sound signal segment are determined and are provided to one or more processing units to perform the modification(s).
摘要翻译：用户通信中的感知交互性通过减少在通信中切换有源发射机的感知延迟而不用减少与通信交换相关联的实际传输和建立延迟来实现。在用户通信中识别声音信号。分析声音信号以识别或估计声音信号段。声音信号段优选地（尽管不一定）位于声音信号的开始或结束处。可以从声音信号本身，声音信号的修改版本或与声音信号相关联的信号直接选择声音信号段。确定声音信号段的长度或持续时间应该是或可以被修改。确定声音信号段的一个或多个修改，并将其提供给一个或多个处理单元以执行修改。

8. 发明申请

US20100232297A1 Method And Arrangement For Adapting Transmission Of Encoded Media 有权
标题翻译：适应传输媒体的方法和布置
公开(公告)号：US20100232297A1
公开(公告)日：2010-09-16
申请号：US12438443
申请日：2007-05-28
申请人： Ingemar Johansson , Tomas Frankkila , Jonas Svedberg
发明人： Ingemar Johansson , Tomas Frankkila , Jonas Svedberg
IPC分类号： H04L12/26 , H04L29/02
CPC分类号： H04L1/0003 , H04L1/0009 , H04L1/0014 , H04L1/0015 , H04L1/0016
摘要： The present invention is to select an adaptation scheme for the transmission of the encoded media that results in a satisfactory performance of the transmitted encoded media. A difference from the prior art is that each adaptation scheme defines a set of different transmission formats, wherein each transmission formats is a combination of at least two of the parameters the source codec bit rate, the packet rate, the number of frames of each packet (referred to as frame aggregation), and the level of redundancy. By using the different transmission formats, the transmission can be adapted to different operating scenarios and the performance is hence improved.
摘要翻译：本发明是选择用于传输编码媒体的适应方案，其导致所传送的编码媒体的令人满意的性能。与现有技术的不同之处在于每个适配方案定义了一组不同的传输格式，其中每个传输格式是源编解码器比特率，分组速率，每个分组的帧数的至少两个参数的组合（简称帧聚合）和冗余级别。通过使用不同的传输格式，传输可以适应不同的操作场景，从而改善性能。

9. 发明授权

US6064956A Method to determine the excitation pulse positions within a speech frame 失效
标题翻译：确定语音帧内的激励脉冲位置的方法
公开(公告)号：US6064956A
公开(公告)日：2000-05-16
申请号：US930951
申请日：1998-01-05
申请人： Jonas Svedberg
发明人： Jonas Svedberg
IPC分类号： G10L19/10
CPC分类号： G10L19/10
摘要： A determination is made of the positions within a speech frame for a given number of excitation pulses in a linear predictive speech encoder. A combination of two known methods is used. The positions of the excitation pulses are calculated in a number of calculation stages according to the first known method. The positions of the excitation pulses are then calculated in a number of calculation stages in accordance with the second method to obtain one of a number of pulse placements. Each calculation according to the second method begins at a starting point from one of a number of positions calculated in accordance with the first method. The proportion between the number of calculation stages in the first method and the second method is chosen so as to obtain the least calculation complexity for a certain given speech quality.
摘要翻译： PCT No.PCT / SE96 / 00465 Sec。 371日期：1998年1月5日 102（e）日期1998年1月5日PCT提交1996年4月10日PCT公布。第WO96 / 32712号公报日期1996年10月17日对线性预测语音编码器中给定数量的激励脉冲的语音帧内的位置进行确定。使用两种已知方法的组合。根据第一已知方法，在多个计算阶段中计算激励脉冲的位置。然后根据第二种方法在多个计算阶段中计算激励脉冲的位置，以获得多个脉冲放置中的一个。根据第二种方法的每个计算都是从根据第一种方法计算出的多个位置之一开始的起始点。选择第一种方法中的计算级数与第二种方法之间的比例，以便为某种给定的语音质量获得最小的计算复杂度。

10. 发明授权

US08543388B2 Efficient speech stream conversion 有权
标题翻译：有效的语音流转换
公开(公告)号：US08543388B2
公开(公告)日：2013-09-24
申请号：US12095709
申请日：2005-11-30
申请人： Nicklas Sandgren , Jonas Svedberg
发明人： Nicklas Sandgren , Jonas Svedberg
IPC分类号： G10L19/00
CPC分类号： G10L19/012 , G10L19/173
摘要： Speech frames of a first speech coding scheme are utilized as speech frames of a second speech coding scheme, where the speech coding schemes use similar core compression schemes for the speech frames, preferably bit stream compatible. An occurrence of a state mismatch in an energy parameter between the first speech coding scheme and the second speech coding scheme is identified, preferably either by determining an occurrence of a predetermined speech evolution, such as a speech type transition, e.g. an onset of speech following a period of speech inactivity, or by tentative decoding of the energy parameter in the two encoding schemes followed by a comparison. Subsequently, the energy parameter in at least one frame of the second speech coding scheme following the occurrence of the state mismatch is adjusted. The present invention also presents transcoders and communications systems providing such transcoding functionality.
摘要翻译：第一语音编码方案的语音帧被用作第二语音编码方案的语音帧，其中语音编码方案对于语音帧使用类似的核心压缩方案，优选地与比特流兼容。识别出第一语音编码方案和第二语音编码方案之间的能量参数中的状态失配的发生，优选地通过确定诸如语音类型转换的预定语音演进的发生，例如，在语音不活动的时期之后的语音开始，或者通过对两个编码方案中的能量参数的暂时解码进行比较。随后，调整在发生状态失配之后的第二语音编码方案的至少一帧中的能量参数。本发明还提供了提供这种代码转换功能的代码转换器和通信系统。

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