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1. 发明专利

JP5097217B2 Coding method, coding apparatus, and a program recording medium 有权
公开(公告)号：JP5097217B2
公开(公告)日：2012-12-12
申请号：JP2009550585
申请日：2009-01-23
申请人：日本電信電話株式会社
发明人：茂明佐々木 , 岳至森 , 仲大室 , 祐介日和▲崎▼ , 章俊片岡 , 公孝堤
IPC分类号： G10L19/14 , G10L19/00 , G10L19/02 , G10L19/035 , G10L19/038 , G10L19/16 , H03M7/30
CPC分类号： H03M7/3082 , G10L19/00 , H04N19/194 , H04N19/85 , H04N19/94
摘要： A coding method with a small error is provided. In the coding method of the present invention, a normalization value obtained from an input signal is corrected for an error calculated from an input and output in vector quantization and is then quantized. The coding method includes a normalization stage of normalizing the input signal in accordance with the normalization value of the input signal, calculated in each frame; a dividing stage of dividing the normalized frame into divided input signal sequences in accordance with a predetermined rule; a vector quantization stage of applying vector quantization to the divided input signal sequences to generate a vector quantization index; and a normalization value correction stage of correcting the normalization value of the input signal for the error obtained from the input and output in the vector quantization stage.

2. 发明专利

JP5060465B2 And collection device, the sound collection method, sound collecting program, recording medium 有权
公开(公告)号：JP5060465B2
公开(公告)日：2012-10-31
申请号：JP2008323559
申请日：2008-12-19
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 , 陽一羽田
IPC分类号： G10L21/02 , H04R1/40 , H04R3/00
摘要： PROBLEM TO BE SOLVED: To provide a sound collecting device that suppresses noise present in an area between a sound source to be collected and a microphone. SOLUTION: The sound collecting device has six or more sound collection units which collect sounds in different angle areas using output signals of two microphone arrays. The sound collecting device further includes a sound source generation area estimation unit which obtains level differences by the areas in an area where angle areas of the two microphone arrays overlap with each other using sound collection signals obtained by the sound collection units, rearranges the level differences by the areas according to large/small relation, and outputs pieces of area information rearranged corresponding to the rearranged level differences by the areas as sound source area information, and a power spectrum estimation unit which computes selection area information from the sound collection signals obtained by the sound collection units and the sound source area information, and estimates signal powers of the sound source corresponding to the selection area information by frequencies. COPYRIGHT: (C)2010,JPO&INPIT

3. 发明专利

JP4950936B2 Sound reproduction equipment and sound reproduction method 有权
公开(公告)号：JP4950936B2
公开(公告)日：2012-06-13
申请号：JP2008107701
申请日：2008-04-17
申请人：日本電信電話株式会社
发明人：賢一古家 , 学岡本 , 健司清原 , 章俊片岡
IPC分类号： H04R3/00 , H04R1/40

4. 发明专利

JP4933975B2 Signal extraction apparatus, the method, and its program 有权
公开(公告)号：JP4933975B2
公开(公告)日：2012-05-16
申请号：JP2007201704
申请日：2007-08-02
申请人：日本電信電話株式会社
发明人：賢一古家 , 章俊片岡
IPC分类号： G10L21/02
摘要： PROBLEM TO BE SOLVED: To effectively extract a target signal. SOLUTION: The device of signal extraction which extracts the target signal emitted from a specific signal source from among B channels of observation signals R b (p) obtained by observing mixed signals of signals emitted from a plurality of signal sources with B pieces of sensors (B≥2) comprises: a part 120, S4 of detecting noise signals N b (p) included in the observation signals R b (p); a part 112, S6 of calculating whitening filter coefficients w b (p) from the noise signals N b (p) and the observation signals R b (p); a part 130, S14 of calculating noise correlation functions as inter-channel correlation functions of the noise signals N b (p) respectively included in the B channels of observation signals; a part 4, S10 of calculating observation correlation functions as inter-channel correlation functions of the B channels of observation signals; a part 140, S16 of determining inverse filter coefficients c b (p) by using the observation correlation functions and the noise correlation functions; and a part 3, S20 of convoluting the inverse filter coefficients into the observation signals R b (p) and adding. COPYRIGHT: (C)2009,JPO&INPIT

5. 发明专利

JP4830026B2 Multiple vector quantization method with polarity, equipment, program and the recording medium 有权
公开(公告)号：JP4830026B2
公开(公告)日：2011-12-07
申请号：JP2009551607
申请日：2009-01-30
申请人：日本電信電話株式会社
发明人：茂明佐々木 , 公孝堤 , 仲大室 , 祐介日和▲崎▼ , 岳至森 , 章俊片岡
IPC分类号： H03M7/30 , G10L19/038 , G10L19/16 , H04N19/00 , H04N19/50 , H04N19/94
CPC分类号： H03M7/3082 , H04N19/94

6. 发明专利

JP4574320B2 Speech coding method, wideband speech coding method, speech coding apparatus, wideband speech coding apparatus, speech coding program, wideband speech coding program and a recording medium recording these programs 有权
公开(公告)号：JP4574320B2
公开(公告)日：2010-11-04
申请号：JP2004306158
申请日：2004-10-20
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： G10L19/14 , G10L19/00 , H03M7/30
摘要： PROBLEM TO BE SOLVED: To perform encoding with high quality by reducing the encoding noise generated by an encoder mismatch with a low amount of operations in communication of VoIP and the like. SOLUTION: Basic noise signal encoding processing to encode a speech signal by a waveform encoding system and to send out a base code, basic noise signal extraction processing to extract the encoded noise from the basic code encoded by the basic encoding processing as a basic noise signal, high-frequency weighting processing to impart a fixed high-frequency weight to the basic noise signal extracted by the basic noise signal extraction processing, and quality extension encoding processing to generate an extension code by encoding the basic noise signal subjected to the high-frequency weighting processing are performed. COPYRIGHT: (C)2006,JPO&NCIPI

7. 发明专利

JP4551275B2 Howling prevention method, the device, the program and the recording medium 有权
公开(公告)号：JP4551275B2
公开(公告)日：2010-09-22
申请号：JP2005153775
申请日：2005-05-26
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： H04B3/20 , H04M1/60 , H04R3/02 , H04R3/04
摘要： PROBLEM TO BE SOLVED: To realize a howling prevention without degrading a two-way communication performance even for a received signal having a band in which an audio signal such as a voice signal and a musical signal is not included. SOLUTION: An input signal and the received signal are each divided into a plurality of frequency bands to find attenuation quantities for the respective frequency bands. The respective attenuation quantities are distributed to attenuating means of a howling prevention device which attenuate the input signal and received signal having been filtered by the frequency bands, and signals obtained by the respective attenuating means are added together to obtain a transmitted signal and an output signal. Further, an attenuation quantity which is found for each frequency band and causes no howling may be an attenuation quantity which is smaller for a band of lower frequency. COPYRIGHT: (C)2007,JPO&INPIT

8. 发明专利

JP4518817B2 Sound collection methods, and collection device, the sound collection program 有权
公开(公告)号：JP4518817B2
公开(公告)日：2010-08-04
申请号：JP2004065513
申请日：2004-03-09
申请人：日本電信電話株式会社
发明人：賢一古家 , 末廣島内 , 章俊片岡 , 真理子青木
IPC分类号： G10L21/02 , G10L11/00 , G10L11/02 , G10L15/04 , G10L15/20
摘要： PROBLEM TO BE SOLVED: To improve the S/N ratio of a voice signal superposed with noise. SOLUTION: A sound pickup method includes a noise-suppressing processing for suppressing the noise included in an input signal and intensifying a target signal; a voice section degree calculating processing for calculating the voice section likeness in each section of the input signal; an original sound addition rate determining processing for determining the rate for adding an original sound to the target signal suppressing the noise, on the basis of the voice section likeness calculated by the voice section degree calculating processing; and an original sound addition processing for adding the original sound to the target signal suppressing the noise, in accordance with an original sound addition rate determined by the original sound addition rate determining processing. COPYRIGHT: (C)2005,JPO&NCIPI

9. 发明专利

JP4504891B2 Echo cancellation method, echo canceller, program, recording medium 有权
公开(公告)号：JP4504891B2
公开(公告)日：2010-07-14
申请号：JP2005251647
申请日：2005-08-31
申请人：日本電信電話株式会社
发明人：末廣島内 , 章俊片岡 , 陽一羽田
IPC分类号： H04R3/02 , H04B3/23

10. 发明专利

JP4413205B2 Echo suppression method, apparatus, echo suppression program, recording medium 有权
公开(公告)号：JP4413205B2
公开(公告)日：2010-02-10
申请号：JP2006171045
申请日：2006-06-21
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： H04B3/20

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