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21. 发明专利

JP4559914B2 Acoustic coupling estimation method, the device, the program and the recording medium 有权
公开(公告)号：JP4559914B2
公开(公告)日：2010-10-13
申请号：JP2005151144
申请日：2005-05-24
申请人：日本電信電話株式会社
发明人：賢一古家 , 和則小林 , 章俊片岡 , 陽一羽田
IPC分类号： H04R3/02
摘要： PROBLEM TO BE SOLVED: To provide a method or the like with which an acoustic coupling amount can be efficiently estimated with high accuracy. SOLUTION: A speech reception level calculation section 11 calculates a speech reception level, a speech reception detection section 12 compares the speech reception level with a preset fixed threshold value and outputs information denoting the arrival of speech reception when the speech reception level is greater than the fixed threshold value. Then a peak interval detection section 13 judges whether or not the speech reception level resides in a peak interval, and outputs a result of the judgement. Further, a speech transmission level calculation section 16 calculates a speech transmission level. Then an acoustic coupling amount calculation section 14 calculates an instantaneous value of the acoustic coupling amount on the basis of a ratio of the speech reception level to the speech transmission level on the condition that the speech reception detection section 12 outputs information denoting the presence of the speech reception and the peak interval detection section 13 outputs the result of judgement that the speech reception level resides in the peak interval. Thereafter, a time smoothing section 15 calculates the acoustic coupling amount from the instantaneous value of the acoustic coupling amount and outputs the calculated acoustic coupling amount. COPYRIGHT: (C)2007,JPO&INPIT

22. 发明专利

JP4512016B2 Stereo signal encoding apparatus, stereo signal encoding method, program and recording medium 有权
标题翻译：空值
公开(公告)号：JP4512016B2
公开(公告)日：2010-07-28
申请号：JP2005270808
申请日：2005-09-16
申请人：日本電信電話株式会社
发明人：仲大室 , 祐介日和▲崎▼ , 岳至森 , 章俊片岡
IPC分类号： G10L19/00 , H04S1/00
摘要： PROBLEM TO BE SOLVED: To encode/decode a stereo signal so as to suppress noise generation and to interconnect with a monophonic signal communication terminal with high encoded signal quality. SOLUTION: In an MS stereo system, a sum signal is generated from two input signals of left and right channels, this sum signal is encoded, and a monophonic signal encoded stream is generated and outputted. Furthermore, a stereo region to encode a differential signal is determined based on the correlation (similarity) of signals of the left and right channels, the differential signal is encoded in the stereo region, and a stereo signal encoded string is outputted. In reconstitution of signals of the left and right channels, the signals of the left and right channels are reconstituted based on the differential signal and the sum signal subjected to monophonic/stereo signal decoding processing, in the stereo region and based on a sum signal subjected to monophonic signal decoding processing is performed, in any region other than the stereo region. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：对立体声信号进行编码/解码，以抑制噪声产生，并与具有高编码信号质量的单声道信号通信终端进行互连。解决方案：在MS立体声系统中，从左和右声道的两个输入信号产生和信号，该和信号被编码，并且生成并输出单声道信号编码流。此外，基于左右声道的信号的相关性（相似度）来确定对差分信号进行编码的立体声区域，差分信号被编码在立体声区域中，并输出立体声信号编码串。在重构左右声道的信号时，基于在立体声区域中进行单声道/立体声信号解码处理的差分信号和和信号，并且基于经过的信号的和信号来重构左声道和右声道的信号在立体声区域以外的任何区域中进行单声道信号解码处理。版权所有（C）2007，JPO＆INPIT

23. 发明专利

JP4495704B2 Sound localization emphasis reproduction method, and its equipment and its program, the storage medium 有权
公开(公告)号：JP4495704B2
公开(公告)日：2010-07-07
申请号：JP2006232598
申请日：2006-08-29
申请人：日本電信電話株式会社
发明人：賢一古家 , 章俊片岡 , 真理子青木
IPC分类号： H04S1/00 , H04S7/00

24. 发明专利

JP4473829B2 And collecting apparatus, program and this the recorded recording medium 有权
公开(公告)号：JP4473829B2
公开(公告)日：2010-06-02
申请号：JP2006052502
申请日：2006-02-28
申请人：日本電信電話株式会社
发明人：賢一古家 , 和則小林 , 裕輔日岡 , 章俊片岡
IPC分类号： H04R3/00 , H04R1/40
摘要： PROBLEM TO BE SOLVED: To provide a sound pickup device capable of effectively removing background noise through the use of a microphone array of small shape and scale. SOLUTION: The sound pickup device comprises: first and second sound pickup parts which define angle domains including a desired sound source position from mutually different positions as a sound pickup range, third and fourth sound pickup parts which define angle domains not including the desired sound source position from the mutually different positions as the sound pickup range, a fifth sound pickup part which defines an angle domain including the desired sound source position from the intermediate point of the sound pickup positions of the first and second sound pickup parts as the sound pickup range, and a sixth sound pickup part which defines an angle domain not including a desired signal source from a position equal to the sound pickup position of the fifth sound pickup part as the sound pickup range. The sound pickup signals of the respective sound pickup parts are converted in a frequency domain. A gain coefficient to be determined by the ratio of a desired signal to the background noise is obtained for each frequency domain. The gain coefficient is multiplied by each frequency domain of the signal with the desired signal defined as a main component. The gain coefficient is made to be substantially zero in the frequency domain where a background noise component is dominant. Then, the amount of the background noise is largely attenuated. COPYRIGHT: (C)2007,JPO&INPIT

25. 发明专利

JP4413175B2 Non-stationary noise discrimination method, the device, the program and the recording medium 有权
公开(公告)号：JP4413175B2
公开(公告)日：2010-02-10
申请号：JP2005256915
申请日：2005-09-05
申请人：日本電信電話株式会社
发明人：賢一古家 , 章俊片岡 , 賢一野口
IPC分类号： G10L11/00
摘要： PROBLEM TO BE SOLVED: To discriminate a voice period in which irregular noise exists, even when a consonant is included in a voice signal. SOLUTION: A linear prediction residual signal of an input signal is calculated for each frame (10, 12, 14), and the prediction residual signal of each frame is divided into a plurality of subframes (16). Values k 1 to k S in which an amplitude of the prediction residual signal for each subframe becomes a first threshold value or more are counted for each frame (28-1 to 28-s), and a maximum value of the counted values k 1 to k S is calculated for each subframe in the same frame (30), and it is discriminated whether the irregular noise exists or not in the frame, depending on whether the maximum value is more than a second threshold value or not (32). COPYRIGHT: (C)2007,JPO&INPIT

26. 发明专利

JP4298466B2 Sound collection method, apparatus, program, and recording medium 有权
公开(公告)号：JP4298466B2
公开(公告)日：2009-07-22
申请号：JP2003370697
申请日：2003-10-30
申请人：日本電信電話株式会社
发明人：賢一古家 , 和則小林 , 末廣島内 , 暁江村 , 章俊片岡 , 陽一羽田 , 澄宇阪内
IPC分类号： H04R5/027 , G10L21/02 , H04R3/00
摘要： PROBLEM TO BE SOLVED: To realize sound collection with localization feeling of a sound image even when there is a speaker at a location where an opening angle viewed from a microphone is small. SOLUTION: A covariance matrix computing part 104 calculates a covariance matrix from a sound reception signal, and stores it in a covariance matrix storing part 106 for each location of a speaker detected by a speaker location detecting part 105. Then, L(R) channel filter coefficient calculating parts 107 L and 107 R calculate L(R) channel filter coefficients from the stored covariance matrix and L(R) channel mixing coefficients under such conditions that their received speaker voice components are mixed by the L(R) channel mixing coefficients corresponding to the respective speaker locations, and set those L(R) channel filter coefficients to L(R) channel filters 102 L1 to 102 LM and 102 R1 to 102 RM . The outputs of the L channel filters 102 L1 to 102 LM are added by an L channel adder 103 L , and the outputs of the R channel filters 102 R1 to 102 RM are added by an R channel adder 103 R to obtain an L channel output signal and an R channel output signal. COPYRIGHT: (C)2005,JPO&NCIPI

27. 发明专利

JP4223441B2 Noise reduction methods, carrying out the process equipment, program, and the recording medium 有权
公开(公告)号：JP4223441B2
公开(公告)日：2009-02-12
申请号：JP2004166216
申请日：2004-06-03
申请人：日本電信電話株式会社
发明人：章俊片岡 , 陽一羽田 , 澄宇阪内
IPC分类号： H04R3/00 , H04R3/04

28. 发明专利

JP4146489B2 Voice packet reproduction method, voice packet reproducing apparatus, voice packet regeneration program, recording medium 有权
公开(公告)号：JP4146489B2
公开(公告)日：2008-09-10
申请号：JP2006513918
申请日：2005-05-25
申请人：日本電信電話株式会社
发明人：仲大室 , 祐介日和▲崎▼ , 岳至森 , 章俊片岡
IPC分类号： H04L12/56 , G10L11/02 , G10L19/00 , G10L21/04 , H04J3/06
CPC分类号： G10L19/005 , G10L21/04 , H04J3/0632

29. 发明专利

JP4121896B2 Echo suppression method, apparatus, program and its storage medium 有权
公开(公告)号：JP4121896B2
公开(公告)日：2008-07-23
申请号：JP2003132026
申请日：2003-05-09
申请人：日本電信電話株式会社
发明人：章俊片岡 , 陽一羽田 , 澄宇阪内
IPC分类号： H04R3/02 , H04B3/20

30. 发明专利

JP4116600B2 Sound collection methods, and collection device, picked up the program, and a recording medium recording this 有权
公开(公告)号：JP4116600B2
公开(公告)日：2008-07-09
申请号：JP2004244037
申请日：2004-08-24
申请人：日本電信電話株式会社
发明人：賢一古家 , 和則小林 , 末廣島内 , 章俊片岡 , 陽一羽田
IPC分类号： H04R3/00 , H04M3/56 , H04R1/40 , H04R5/027

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