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1. 发明申请

WO03069873A2 AUDIO ENHANCEMENT COMMUNICATION TECHNIQUES 审中-公开
标题翻译：音频增强通信技术
公开(公告)号：WO03069873A2
公开(公告)日：2003-08-21
申请号：PCT/US0302122
申请日：2003-01-22
申请人： TELLABS OPERATIONS INC , DUNNE BRUCE E , CHANDRAN RAVI , MARCHOK DANIEL J
发明人： DUNNE BRUCE E , CHANDRAN RAVI , MARCHOK DANIEL J
IPC分类号： G10L19/14 , G10L21/02 , H04B1/66 , H04M
CPC分类号： G10L19/18 , G10L21/0364 , H04B1/66
摘要： A communication system (10) receives a communication signal comprising first and second data with different compression levels, such as highly compressed and weakly compressed levels. A mode detector (15) detects the level of compression. One or more signal decoders (20, 22) decode the highly compressed data. An analyzer (30) determines the type of enhancement required. One or more processors (48, 50, 80) enhance the data as required. An encoder (60) reencodes the enhanced decoded data. Metrics (90) may aid the operation of the analyzer (30). The communication system may include telephones (120, 122, 124, 126). Processors (103, 104) enhance signals in opposite first and second directions between pairs of the telephones. A path (106) connects the processors in tandem. One or more switches (101, 102) disable signal enhancement for one of the processors depending on the compression level of the signals to avoid degrading call quality.
摘要翻译：通信系统（10）接收包括具有不同压缩级别的第一和第二数据的通信信号，例如高度压缩和弱压缩的级别。模式检测器（15）检测压缩水平。一个或多个信号解码器（20,22）对高度压缩的数据进行解码。分析器（30）确定所需的增强类型。一个或多个处理器（48,50,80）根据需要增强数据。编码器（60）对增强的解码数据进行重新编码。度量（90）可以帮助分析仪（30）的操作。通信系统可以包括电话（120,122,124,126）。处理器（103,104）在成对的电话之间的相对的第一和第二方向增强信号。路径（106）串联连接处理器。取决于信号的压缩级别，一个或多个开关（101,102）禁止一个处理器的信号增强，以避免降低呼叫质量。

2. 发明申请

WO2001073751A1 SPEECH PRESENCE MEASUREMENT DETECTION TECHNIQUES 审中-公开
标题翻译：语音存在测量检测技术
公开(公告)号：WO2001073751A1
公开(公告)日：2001-10-04
申请号：PCT/US2001/040226
申请日：2001-03-02
申请人： TELLABS OPERATIONS, INC. , CHANDRAN, Ravi , DUNNE, Bruce, E. , MARCHOK, Daniel, J.
发明人： CHANDRAN, Ravi , DUNNE, Bruce, E. , MARCHOK, Daniel, J.
IPC分类号： G10L11/02
CPC分类号： G10L25/78 , G10L21/0208 , G10L21/0232 , G10L21/0264 , G10L2025/783
摘要： In order to enhance the quality of a communication signal derived from speech and noise (20), the likelihood that the communication signals result from at least some speech is determined. A calculator calculates a first power signal representing the power of at least a portion of the communication signals estimated over a first time period and calculates a second power signal representing the power of at least a portion of the communication signals estimated over a second time period longer than the first time period. The calculator also generates a comparison signal having a value related to the likelihood that the portion of the communication signals result at least from some speech by comparing a first expression involving the first power signal with a second expression involving the second power signal. The calculator also generates a speech likelihood signal having a value representing a first likelihood that the communication signal results from at least some speech in the event that the comparison signal falls within a first range and having a second value representing a second likelihood that the communication signal results from at least some speech in the event that the comparison signal value falls within a second range. The second likelihood is different from the first likelihood.
摘要翻译：为了提高从语音和噪声（20）导出的通信信号的质量，确定通信信号从至少一些语音产生的可能性。计算器计算表示在第一时间周期估计的通信信号的至少一部分的功率的第一功率信号，并且计算表示在第二时间段内估计的至少一部分通信信号的功率的第二功率信号比第一个时期。所述计算器还生成比较信号，所述比较信号具有与通过将所述第一功率信号相关联的第一表达式与涉及所述第二功率信号的第二表达式进行比较，使得所述通信信号的所述部分至少从某些语音产生的可能性的值。所述计算器还产生语音似然信号，所述语音似然信号具有表示所述通信信号在所述比较信号落入第一范围内并具有表示所述通信信号的第二似然度的情况下由至少一些语音产生的第一似然性的值在比较信号值落入第二范围的情况下，来自至少一些语音的结果。第二种可能性与第一种可能性不同。

3. 发明申请

WO2003069873A3 AUDIO ENHANCEMENT COMMUNICATION TECHNIQUES 审中-公开
公开(公告)号：WO2003069873A3
公开(公告)日：2003-08-21
申请号：PCT/US2003/002122
申请日：2003-01-22
申请人： TELLABS OPERATIONS, INC. , DUNNE, Bruce, E. , CHANDRAN, Ravi , MARCHOK, Daniel, J.
发明人： DUNNE, Bruce, E. , CHANDRAN, Ravi , MARCHOK, Daniel, J.
IPC分类号： H04B1/66
摘要： A communication system (10) receives a communication signal comprising first and second data with different compression levels, such as highly compressed and weakly compressed levels. A mode detector (15) detects the level of compression. One or more signal decoders (20, 22) decode the highly compressed data. An analyzer (30) determines the type of enhancement required. One or more processors (48, 50, 80) enhance the data as required. An encoder (60) reencodes the enhanced decoded data. Metrics (90) may aid the operation of the analyzer (30). The communication system may include telephones (120, 122, 124, 126). Processors (103, 104) enhance signals in opposite first and second directions between pairs of the telephones. A path (106) connects the processors in tandem. One or more switches (101, 102) disable signal enhancement for one of the processors depending on the compression level of the signals to avoid degrading call quality.

4. 发明申请

WO0173751A8 SPEECH PRESENCE MEASUREMENT DETECTION TECHNIQUES 审中-公开
标题翻译：语音存在测量检测技术
公开(公告)号：WO0173751A8
公开(公告)日：2002-02-07
申请号：PCT/US0140226
申请日：2001-03-02
申请人： TELLABS OPERATIONS INC , CHANDRAN RAVI , DUNNE BRUCE E , MARCHOK DANIEL J
发明人： CHANDRAN RAVI , DUNNE BRUCE E , MARCHOK DANIEL J
IPC分类号： G10L11/02 , G10L21/02 , G10L19/00
CPC分类号： G10L25/78 , G10L21/0208 , G10L21/0232 , G10L21/0264 , G10L2025/783
摘要： In order to enhance the quality of a communication signal derived from speech and noise (20), the likelihood that the communication signals result from at least some speech is determined. A calculator calculates a first power signal representing the power of at least a portion of the communication signals estimated over a first time period and calculates a second power signal representing the power of at least a portion of the communication signals estimated over a second time period longer than the first time period. The calculator also generates a comparison signal having a value related to the likelihood that the portion of the communication signals result at least from some speech by comparing a first expression involving the first power signal with a second expression involving the second power signal. The calculator also generates a speech likelihood signal having a value representing a first likelihood that the communication signal results from at least some speech in the event that the comparison signal falls within a first range and having a second value representing a second likelihood that the communication signal results from at least some speech in the event that the comparison signal value falls within a second range. The second likelihood is different from the first likelihood.
摘要翻译：为了提高从语音和噪声（20）导出的通信信号的质量，确定通信信号从至少一些语音产生的可能性。计算器计算表示在第一时间周期估计的通信信号的至少一部分的功率的第一功率信号，并且计算表示在第二时间段内估计的至少一部分通信信号的功率的第二功率信号比第一个时期。所述计算器还生成比较信号，所述比较信号具有与通过将所述第一功率信号相关联的第一表达式与涉及所述第二功率信号的第二表达式进行比较，使得所述通信信号的所述部分至少从某些语音产生的可能性的值。所述计算器还产生语音似然信号，所述语音似然信号具有表示所述通信信号在所述比较信号落入第一范围内并具有表示所述通信信号的第二似然度的情况下由至少一些语音产生的第一似然性的值在比较信号值落入第二范围的情况下，来自至少一些语音的结果。第二种可能性与第一种可能性不同。

5. 发明申请

WO2001073761A1 RELATIVE NOISE RATIO WEIGHTING TECHNIQUES FOR ADAPTIVE NOISE CANCELLATION 审中-公开
标题翻译：用于自适应噪声消除的相对噪声比例称重技术
公开(公告)号：WO2001073761A1
公开(公告)日：2001-10-04
申请号：PCT/US2001/006893
申请日：2001-03-02
申请人： TELLABS OPERATIONS, INC. , CHANDRAN, Ravi , DUNNE, Bruce, E. , MARCHOK, Daniel, J.
发明人： CHANDRAN, Ravi , DUNNE, Bruce, E. , MARCHOK, Daniel, J.
IPC分类号： G10L21/02
CPC分类号： G10L21/0208
摘要： In order to enhance the quality of a communication signal comprising speech signal components due to speech and noise signal components due to noise, a filter (50) divides the communication signal into a plurality of frequency band signals representing the speech signal components and the noise signal components in a plurality of frequency bands. A calculator generates a plurality of weighting signals having weighting values corresponding to the frequency band signals. The weighting values (90, 100, 110) represent at least approximations of the normalized powers of the noise signal components in the frequency band signals. The frequency band signals are altered in response to the weighting signals to generate weighted frequency band signals which are combined to generate a communication signal with enhanced quality (170).
摘要翻译：为了提高包含由噪声引起的语音和噪声信号分量的语音信号分量的通信信号的质量，滤波器（50）将通信信号分成多个表示语音信号分量和噪声信号的频带信号多个频带中的分量。计算器产生具有对应于频带信号的加权值的多个加权信号。加权值（90,100,110）至少表示频带信号中的噪声信号分量的归一化功率的近似值。响应于加权信号改变频带信号以产生加权的频带信号，其被组合以产生具有增强质量的通信信号（170）。

6. 发明申请

WO0041169A9 METHOD AND APPARATUS FOR ADAPTIVELY SUPPRESSING NOISE 审中-公开
标题翻译：适应性抑制噪声的方法和装置
公开(公告)号：WO0041169A9
公开(公告)日：2002-04-11
申请号：PCT/US0000397
申请日：2000-01-07
申请人： TELLABS OPERATIONS INC , CHANDRAN RAVI , DUNNE BRUCE E , MARCHOK DANIEL J
发明人： CHANDRAN RAVI , DUNNE BRUCE E , MARCHOK DANIEL J
IPC分类号： G10L21/02
CPC分类号： G10L21/0208 , G10L21/0232 , G10L25/18
摘要： An apparatus and method for suppressing noise is presented. The apparatus may utilize a filter bank of bandpass filters to split the input noisy speech-containing signal into separate frequency bands. The overall average noise-to-signal ratio (NSR) of the input signal is estimated in the overall NSR estimator, which estimates the average noisy signal power in the input signal during speech activity and the average noise power during silence. Two indirect power measures are performed for each band, measuring a short-term power and a long-term power. The power estimation processes are adapted based on the signal activity indicated by the JVADAD. An NSR adapter adapts the NSR for each frequency band based on the long-term and short-term power measures, the overall NSR and the signal activity indicated by the JVADAD. The gain computer utilizes these NSR values to determine the gain factors for each frequency band.
摘要翻译：提出了一种抑制噪声的装置和方法。该装置可以利用滤波器组的带通滤波器将输入的含噪声语音的信号分离成单独的频带。在整个NSR估计器中估计输入信号的总平均噪声信噪比（NSR），NSR估计器估计语音活动期间输入信号中的平均噪声信号功率和静音期间的平均噪声功率。对每个频带执行两个间接功率测量，测量短期功率和长期功率。功率估计过程基于JVADAD指示的信号活动进行调整。 NSR适配器根据长期和短期功率测量，整个NSR和JVADAD指示的信号活动，对每个频段的NSR进行适配。增益计算机利用这些NSR值来确定每个频带的增益因子。

7. 发明申请

WO0173761A9 RELATIVE NOISE RATIO WEIGHTING TECHNIQUES FOR ADAPTIVE NOISE CANCELLATION 审中-公开
标题翻译：用于自适应噪声消除的相对噪声比例称重技术
公开(公告)号：WO0173761A9
公开(公告)日：2003-01-03
申请号：PCT/US0106893
申请日：2001-03-02
申请人： TELLABS OPERATIONS INC , CHANDRAN RAVI , DUNNE BRUCE E , MARCHOK DANIEL J
发明人： CHANDRAN RAVI , DUNNE BRUCE E , MARCHOK DANIEL J
IPC分类号： G10L21/02
CPC分类号： G10L21/0208
摘要： In order to enhance the quality of a communication signal comprising speech signal components due to speech and noise signal components due to noise, a filter (50) divides the communication signal into a plurality of frequency band signals representing the speech signal components and the noise signal components in a plurality of frequency bands. A calculator generates a plurality of weighting signals having weighting values corresponding to the frequency band signals. The weighting values (90, 100, 110) represent at least approximations of the normalized powers of the noise signal components in the frequency band signals. The frequency band signals are altered in response to the weighting signals to generate weighted frequency band signals which are combined to generate a communication signal with enhanced quality (170).
摘要翻译：为了提高包含由噪声引起的语音和噪声信号分量的语音信号分量的通信信号的质量，滤波器（50）将通信信号分成多个表示语音信号分量和噪声信号的频带信号多个频带中的分量。计算器产生具有对应于频带信号的加权值的多个加权信号。加权值（90,100,110）至少表示频带信号中的噪声信号分量的归一化功率的近似值。响应于加权信号改变频带信号以产生加权的频带信号，其被组合以产生具有增强质量的通信信号（170）。

8. 发明申请

WO0173751A9 SPEECH PRESENCE MEASUREMENT DETECTION TECHNIQUES 审中-公开
标题翻译：语音存在测量检测技术
公开(公告)号：WO0173751A9
公开(公告)日：2003-02-06
申请号：PCT/US0140226
申请日：2001-03-02
申请人： TELLABS OPERATIONS INC , CHANDRAN RAVI , DUNNE BRUCE E , MARCHOK DANIEL J
发明人： CHANDRAN RAVI , DUNNE BRUCE E , MARCHOK DANIEL J
IPC分类号： G10L11/02 , G10L21/02 , G10L19/00
CPC分类号： G10L25/78 , G10L21/0208 , G10L21/0232 , G10L21/0264 , G10L2025/783
摘要： In order to enhance the quality of a communication signal derived from speech and noise (20), the likelihood that the communication signals result from at least some speech is determined. A calculator calculates a first power signal representing the power of at least a portion of the communication signals estimated over a first time period and calculates a second power signal representing the power of at least a portion of the communication signals estimated over a second time period longer than the first time period. The calculator also generates a comparison signal having a value related to the likelihood that the portion of the communication signals result at least from some speech by comparing a first expression involving the first power signal with a second expression involving the second power signal. The calculator also generates a speech likelihood signal having a value representing a first likelihood that the communication signal results from at least some speech in the event that the comparison signal falls within a first range and having a second value representing a second likelihood that the communication signal results from at least some speech in the event that the comparison signal value falls within a second range. The second likelihood is different from the first likelihood.
摘要翻译：为了提高从语音和噪声（20）导出的通信信号的质量，确定通信信号从至少一些语音产生的可能性。计算器计算表示在第一时间周期估计的通信信号的至少一部分的功率的第一功率信号，并且计算表示在第二时间段内估计的至少一部分通信信号的功率的第二功率信号比第一个时期。所述计算器还生成比较信号，所述比较信号具有与通过将所述第一功率信号相关联的第一表达式与涉及所述第二功率信号的第二表达式进行比较，使得所述通信信号的所述部分至少从某些语音产生的可能性的值。所述计算器还产生语音似然信号，所述语音似然信号具有表示所述通信信号在所述比较信号落入第一范围内并具有表示所述通信信号的第二似然度的情况下由至少一些语音产生的第一似然性的值在比较信号值落入第二范围的情况下，来自至少一些语音的结果。第二种可能性与第一种可能性不同。

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