公开(公告)号：US5117228A

公开(公告)日：1992-05-26

申请号：US597706

申请日：1990-10-17

申请人： Tokuhiko Fuchigami ,  Masaya Konishi ,  Sadahiro Yasura ,  Yasuhiro Yamada

发明人： Tokuhiko Fuchigami ,  Masaya Konishi ,  Sadahiro Yasura ,  Yasuhiro Yamada

IPC分类号： G10L11/00 ,  G10L19/00 ,  H03M1/18 ,  H03M7/30 ,  H04B14/00

CPC分类号： G10L19/0212

摘要： A system for coding and decoding an audio signal by using an orthogonal and inverse orthogonal transformation of a block unit, includes a coding unit having a circuit for obtaining a power level of the audio signal of a segment unit having a predetermined time interval shorter than the block unit, a circuit for generating a gain control signal from the power level, a circuit for performing a predetermined adaptive gain control responsive to the gain control signal to generate and output the adaptive gain control signal to a decoding unit, thereby performing a pre-treatment, and a coding portion for coding the adaptive gain control signal by using the orthogonal transformation to generate and output a coded signal; and the decoding unit having a decoding portion for decoding the coded signal, dequantizing and inversely and orthogonally transforming a decoded audio signal, and a circuit for performing an inverse gain control for the decoded audio signal responsive to the adaptive gain control signal from the adaptive gain control circuit to reproduce and output an audio signal, thereby performing post-treatment.

公开(公告)号：US5146222A

公开(公告)日：1992-09-08

申请号：US597700

申请日：1990-10-17

申请人： Tokuhiko Fuchigami ,  Masaya Konishi ,  Sadahiro Yasura ,  Yasuhiro Yamada

发明人： Tokuhiko Fuchigami ,  Masaya Konishi ,  Sadahiro Yasura ,  Yasuhiro Yamada

IPC分类号： G10L11/00 ,  H03M7/30 ,  H04B1/66

CPC分类号： H04B1/665

摘要： A coding unit for coding an audio signal by using an adaptive orthogonal transformation and a coding method comprises calculating the sum total of power of an input audio signal in a time duration of an orthogonal transform length or over the length, adaptively controlling the minimum audible level as a threshold level corresponding to the power level on a frequency axis after the orthogonal transformation or on a time axis before the orthogonal transformation, excepting samples having a power level under the threshold level from orthogonally transformed samples and quantizing remaining samples. The threshold level of the minimum audible level is adaptively controlled corresponding to an observed level of an input audio signal. Even if the input audio signal has various power levels, it is possible to usually set the adaptively audible value (the threshold level), thereby effectively reducing a coding amount.

公开(公告)号：US08045840B2

公开(公告)日：2011-10-25

申请号：US11791083

申请日：2005-11-18

申请人： Hisako Murata ,  Takuma Suzuki ,  Sadahiro Yasura ,  Miki Haneishi ,  Katsumi Hasegawa ,  Naoko Aizaki ,  Yoshihisa Fujinami ,  Masami Takeda ,  Takayuki Sugahara

发明人： Hisako Murata ,  Takuma Suzuki ,  Sadahiro Yasura ,  Miki Haneishi ,  Katsumi Hasegawa ,  Naoko Aizaki ,  Yoshihisa Fujinami ,  Masami Takeda ,  Takayuki Sugahara

IPC分类号： H04N9/80 ,  H04N5/77 ,  H04N5/92 ,  H04R5/00 ,  H04R3/00 ,  H04R5/02 ,  H04H40/81 ,  H04B15/00 ,  H02B1/00

CPC分类号： H04S1/005 ,  H04R1/1091 ,  H04R5/027

摘要： A video-audio recording and reproducing apparatus (101) has a built-in stereo microphone (21a, 21b) and an external microphone connection terminal (32). The external microphone connection terminal (32) is connected to a binaural microphone (3) to be attached to the ears of a photographer (300). When the binaural microphone (3) is used to collect ambient sounds, an audio signal to be recorded on a recording medium is switched from an audio signal from the built-in stereo microphone (21a, 21b) to a binaural audio signal from the binaural microphone (3). The photographer (300) puts the binaural microphone (3 (31a, 31b)) on his or her ears and collects ambient sounds around the photographer (300) including a sound emanating from an object. The object is photographed with a camera unit (11). The recording medium records the binaural audio signal, a photographed video signal, and a binaural flag signal.

摘要翻译： 视频音频记录和再现装置（101）具有内置立体声麦克风（21a，21b）和外部麦克风连接端子（32）。 外部麦克风连接端子（32）连接到双耳麦克风（3）以附接到摄影师（300）的耳朵。 当双耳麦克风（3）用于收集环境声音时，要记录在记录介质上的音频信号从内置立体声麦克风（21a，21b）的音频信号切换到来自双耳的双耳音频信号 麦克风（3）。 拍摄者（300）将双耳麦克风（3（31a，31b））放在他或她的耳朵上，并收集包括从物体发出的声音的摄影者（300）周围的环境声音。 用相机单元（11）拍摄对象。 记录介质记录双耳音频信号，拍摄的视频信号和双耳标志信号。

公开(公告)号：US20080002948A1

公开(公告)日：2008-01-03

申请号：US11791083

申请日：2005-11-18

申请人： Hisako Murata ,  Takuma Suzuki ,  Sadahiro Yasura ,  Miki Haneishi ,  Katsumi Hasegawa ,  Naoko Aizaki ,  Yoshihisa Fujinami ,  Masami Takeda ,  Takayuki Sugahara

发明人： Hisako Murata ,  Takuma Suzuki ,  Sadahiro Yasura ,  Miki Haneishi ,  Katsumi Hasegawa ,  Naoko Aizaki ,  Yoshihisa Fujinami ,  Masami Takeda ,  Takayuki Sugahara

IPC分类号： H04N5/91

CPC分类号： H04S1/005 ,  H04R1/1091 ,  H04R5/027

摘要： A video-audio recording and reproducing apparatus (101) has a built-in stereo microphone (21a, 21b) and an external microphone connection terminal (32). The external microphone connection terminal (32) is connected to a binaural microphone (3) to be attached to the ears of a photographer (300). When the binaural microphone (3) is used to collect ambient sounds, an audio signal to be recorded on a recording medium is switched from an audio signal from the built-in stereo microphone (21a, 21b) to a binaural audio signal from the binaural microphone (3). The photographer (300) puts the binaural microphone (3 (31a, 31b)) on his or her ears and collects ambient sounds around the photographer (300) including a sound emanating from an object. The object is photographed with a camera unit (11). The recording medium records the binaural audio signal, a photographed video signal, and a binaural flag signal.

摘要翻译： 视频音频记录和再现装置（101）具有内置立体声麦克风（21a，21b）和外部麦克风连接端子（32）。 外部麦克风连接端子（32）连接到双耳麦克风（3）以附接到摄影师（300）的耳朵。 当双耳麦克风（3）用于收集环境声音时，要记录在记录介质上的音频信号从内置立体声麦克风（21a，21b）的音频信号切换到双耳音频信号 双耳麦克风（3）。 拍摄者（300）将双耳麦克风（3（31a，31b））放在他或她的耳朵上，并收集包围从物体发出的声音的摄影师（300）周围的环境声音。 用相机单元（11）拍摄对象。 记录介质记录双耳音频信号，拍摄的视频信号和双耳标志信号。