| Patent application number | Description | Published |
|---|
| 20080298576 | Communication system, communication control unit, communication control method. communication control program and monitoring unit - A communication system | 12-04-2008 |
| 20090092207 | Automatic Gain Control Apparatus - An automatic gain control apparatus that can prevent jumps in the gain coefficient when the gain coefficient is altered, due to a sharp change in the level of the received signal before and after the alteration, having a mean square circuit ( | 04-09-2009 |
| 20100290615 | Echo canceller operative in response to fluctuation on echo path - In a telephone device, a near-end signal processor delays each input near-end signal delivered from the respective microphones by a delay amount, and synthesizes the input near-end signals into a synthesized near-end signal. In an echo canceller, mounted on board the telephone device, a far-end signal is delayed by the same delay amounts as used in the near-end signal processor to form plural delayed far-end signals, which are synthesized into a synthesized far-end signal, with which the echo component in the synthesized near-end signal will be suppressed. | 11-18-2010 |
| 20110069847 | Sound collecting device, acoustic communication system, and computer-readable storage medium - There is provided a sound collecting device, including: an orientation direction forming section that forms an orientation direction of a microphone array; and a control section that, when a characteristic in a frequency band of a synthesized signal obtained by synthesizing the acoustic signals corresponds to a characteristic of an acoustic signal corresponding to a sound other than a target sound, controls the orientation direction forming section such that an orientation direction that is a direction that is different than an orientation direction of the microphone array at a present point in time is formed, and, when the characteristic in the frequency band of the synthesized signal does not correspond to a characteristic of an acoustic signal corresponding to a sound other than the target sound, controls the orientation direction forming section such that the orientation direction of the microphone array is maintained. | 03-24-2011 |
| 20130066628 | APPARATUS AND METHOD FOR SUPPRESSING NOISE FROM VOICE SIGNAL BY ADAPTIVELY UPDATING WIENER FILTER COEFFICIENT BY MEANS OF COHERENCE - A voice signal processor detects background noise sections to reflect characteristics of the background noise on the Wiener filter coefficient to be used for suppressing noise components of input voice signals. In the voice signal processor, directivity signal generators form directivity signals having a directivity pattern. The directivity signals are used by a coherence calculator to obtain coherence, which is in turn used by a targeted voice section detector to detect a targeted voice section. A background noise section detector detects background noise sections containing no voice signal. When a background noise section is detected, a WF adapter uses characteristics of background noise in the detected temporal section to calculate a new WF coefficient. | 03-14-2013 |
| 20130085751 | VOICE COMMUNICATION SYSTEM ENCODING AND DECODING VOICE AND NON-VOICE INFORMATION - In a voice coding apparatus of a voice communication system, feature parameters of background noise in background noise sections of an input signal stream are extracted and background noise is encoded into a comfortable-noise code, and embedding positions where additional information is to be embedded are determined according to the values of the extracted feature parameters. Additional information is embedded into the embedding positions thus determined of the voice or comfortable-noise code, which will be transmitted to a voice decoding apparatus in the system. In the decoding apparatus, the transmitted code is separated into voice and background noise sections to be decoded. From the background noise sections, the values of the feature parameters are found out and used to reference a correspondence relationship table to determine the embedding positions where the additional information is embedded. The additional information is extracted at the embedding positions thus determined to be restored. | 04-04-2013 |
| 20140341384 | SOUND EMITTING AND COLLECTING APPARATUS, SOUND SOURCE SEPARATING UNIT AND COMPUTER-READABLE MEDIUM HAVING SOUND SOURCE SEPARATION PROGRAM - The present invention relates to a sound emitting and collecting apparatus including a sound collecting portion that captures surrounding sound using two microphones, and a sound emitting portion that emits sound from at least one speaker. The apparatus includes a sound source separating portion that extracts a target sound from a sound source in a predetermined direction, based on an input sound signal obtained by capturing surrounding sound using the two microphones, and an emission non-target sound removing portion that removes a non-target sound that is emitted from the speaker and captured by each of the microphones, based on sound source data for the sound emitting portion. The emission non-target sound removing portion is provided on a path that reaches the sound source separating portion. The emission non-target sound removing portion has a structure similar to an acoustic echo canceller, for example. | 11-20-2014 |
| 20150235792 | ELECTROMAGNETIC RELAY - An electromagnetic relay includes: an electromagnet; a twin contact set that includes first twin contacts provided on a first movable spring, and second twin contacts that are provided on a first fixed contact plate and disposed opposite to the first twin contacts; a single contact set that includes a first single contact provided on a second movable spring, and a second single contact that is provided on a second fixed contact plate and disposed opposite to the first single contact; and a card that moves in response to excitation or non-excitation of the electromagnet, and moves the first and the second movable springs simultaneously with the movement of the card. | 08-20-2015 |
