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11. 发明公开

EP2374127A2 REGENERATION OF WIDEBAND SPEECH 有权转让
标题翻译：再生宽带语言的
公开(公告)号：EP2374127A2
公开(公告)日：2011-10-12
申请号：EP09799590.6
申请日：2009-12-10
申请人： Skype Limited
发明人： NILSSON, Mattias , VANG ANDERSEN, Soren , VOS, Koen Bernard
IPC分类号： G10L21/02
CPC分类号： G10L21/038
摘要： A method and system for regenerating wideband speech from narrowband speech. The method comprises: receiving samples of a narrowband speech signal in a first range of frequencies; modulating received samples of the narrowband speech signal with a modulation signal having a modulating frequency adapted to upshift each frequency in the first range of frequencies by an amount determined by the modulating frequency wherein the modulating frequency is selected to translate into a target band a selected frequency band within the first range of signals; filtering the modulated samples using a high pass filter to form a regenerated speech signal in the target band, wherein the lower limit of the high pass filter defines the lowermost frequency in the target band; and combining the narrow band speech signal with the regenerated speech signal in the target band to regenerate a wideband speech signal.

12. 发明公开

EP2384506A1 SPEECH CODING 有权转让
标题翻译：方法和设备语音编码
公开(公告)号：EP2384506A1
公开(公告)日：2011-11-09
申请号：EP10700155.4
申请日：2010-01-05
申请人： Skype Limited
发明人： VOS, Koen Bernard
IPC分类号： G10L19/08 , 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.

13. 发明公开

EP2374245A1 CONTROLLING PACKET TRANSMISSION USING BANDWIDTH ESTIMATION 有权转让
标题翻译：控制包装传输采用带宽估计
公开(公告)号：EP2374245A1
公开(公告)日：2011-10-12
申请号：EP09775179.6
申请日：2009-12-11
申请人： Skype Limited
发明人： ANDERSEN, Soren Vang , RODBRO, Christoffer Asgaard , VOS, Koen Bernard
IPC分类号： H04L12/56 , H04L12/26
CPC分类号： H04L47/10 , H04L43/0852 , H04L43/0876 , H04L43/106
摘要： A method, program and apparatus for estimating a bandwidth of a channel from a transmitter (2) to a receiver (i). The method comprises: receiving a packet stream at the receiver (i) from the transmitter (2); receiving from the transmitter an indication of data transmitted from the transmitter to one or more other recipients than said receiver between packets of said packet stream (CT); and determining at the receiver (i), using said indication, an estimate of the bandwidth of said channel. The estimate may enable transmission of packets from the transmitter to be controlled.

14. 发明公开

EP2384509A1 FILTERING SPEECH 有权转让
标题翻译：过滤语言
公开(公告)号：EP2384509A1
公开(公告)日：2011-11-09
申请号：EP10700052.3
申请日：2010-01-05
申请人： Skype Limited
发明人： VOS, Koen Bernard , STROMMER, Stefan
IPC分类号： G10L21/02
CPC分类号： G10L21/02
摘要： A method of filtering a speech signal for speech encoding in a communications network, includes determining a cut off frequency for a filter, wherein a component of the speech signal in a frequency range less than the cut off frequency is to be attenuated by the filter; receiving the speech signal at the filter; determining at least one parameter of the received speech signal, the at least one parameter providing an indication of the energy of the component of the received speech signal that is to be attenuated; and adjusting the cut off frequency in dependence on the at least one parameter, thereby adjusting the frequency range to be attenuated.

15. 发明公开

EP2384508A1 SPEECH CODING 有权转让
标题翻译：语音编码
公开(公告)号：EP2384508A1
公开(公告)日：2011-11-09
申请号：EP10704769.8
申请日：2010-01-05
申请人： Skype Limited
发明人： VOS, Koen Bernard , JENSEN, Soren Skak
IPC分类号： G10L19/12
CPC分类号： G10L19/12 , G10L19/09
摘要： A method, system and computer program for encoding speech according to a source-filter model. The method comprises deriving a spectral envelope signal representative of a modelled filter and a first remaining signal representative of a modelled source signal, and deriving a second remaining signal from the first remaining signal by, at intervals during the encoding: exploiting a correlation between approximately periodic portions in the first remaining signal to generate a predicted version of a later portion from a stored version of an earlier portion, and using the predicted-version of the later portion to remove an effect of said periodicity from the first remaining signal. The method further comprises, once every number of intervals, transforming the stored version of the earlier portion of the first remaining signal prior to generating the predicted version of the respective later portion.
摘要翻译：根据源滤波器模型对语音进行编码的方法，系统和计算机程序。该方法包括：导出表示建模滤波器的频谱包络信号和表示建模源信号的第一剩余信号，并且通过在编码期间的间隔导出来自第一剩余信号的第二剩余信号：利用近似周期性第一剩余信号中的一些部分，以从先前部分的存储版本产生后一部分的预测版本，以及使用后一部分的预测版本从第一剩余信号中去除所述周期性的影响。该方法还包括在每个数量的间隔一次之后，在生成相应后面部分的预测版本之前，变换第一剩余信号的较早部分的存储版本。

16. 发明公开

EP2384504A1 SPEECH CODING 有权转让
标题翻译：语音编码
公开(公告)号：EP2384504A1
公开(公告)日：2011-11-09
申请号：EP10700051.5
申请日：2010-01-05
申请人： Skype Limited
发明人： VOS, Koen Bernard
IPC分类号： G10L19/06 , G10L19/08
CPC分类号： G10L19/09 , G10L19/07 , G10L19/12
摘要： A method, system and program for encoding and decoding speech according to a source-filter model whereby speech is modeled to comprise a source signal filtered by a time-varying filter. The method comprises: receiving a speech signal; and from the speech signal, deriving a spectral envelope signal representing the modeled filter and a remaining signal representing the modeled source. At intervals during the encoding, the method further comprises determining a period between portions of the remaining signal having a degree of repetition and determining a correlation between said portions based on that period, thus producing a respective vector of the correlation for each interval. Once every number of said intervals, the method further comprises selecting a codebook from a plurality of codebooks for quantizing the vectors, quantizing the vectors of that number of intervals according to the selected codebook, and transmitting the quantized vectors along with an indication of the selected codebook.
摘要翻译：一种用于根据源滤波器模型对语音进行编码和解码的方法，系统和程序，由此语音被建模为包括由时变滤波器滤波的源信号。该方法包括：接收语音信号; 并从语音信号中导出表示建模滤波器的频谱包络信号和表示建模源的剩余信号。在编码期间，该方法进一步包括确定剩余信号的具有重复程度的部分之间的周期，并基于该周期确定所述部分之间的相关性，由此产生每个间隔的相关性的相应向量。一旦每隔多个所述间隔，所述方法进一步包括从多个码本中选择用于量化所述矢量的码本，根据所选择的码本来量化所述多个间隔的矢量，并且传送量化的矢量以及所选择的指示码本。

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