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JPH10126219A |
To provide the digital filter in which the number of gates and a power consumption level are reduced. The digital filter, suitably used for a code division multiple access or other bust mode communication equipment, uses a standby coupli...
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JP2748826B2 |
PURPOSE: To prevent excess correction or irrational correction in the device correcting the response characteristic of a reproduction system so that the response characteristic of the reproduction system is made coincident with the desir...
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JP2748743B2 |
PURPOSE: To easily receive a time division multiplexed digital data signal transmitted via a communication path where an interference between codes and a high speed fluctuation occur with high quality. CONSTITUTION: When a time division ...
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JP2749780B2 |
PURPOSE: To adapt a transfer function so as to generate no error and to eliminate the necessity of imparting a signal - noise power ratio in detection of a time delay in a non-Gaussian noise. CONSTITUTION: A signal is received by two inp...
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JP2747100B2 |
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JPH10117159A |
To greatly improve performance of a near-end sound(NES) detector by utilizing intelligence that is stored with respect to an echo path delay acquired as a result of an adaptive process. Echo detection and cancellation in this communicati...
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JP2741766B2 |
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JP2740209B2 |
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JP2740091B2 |
PURPOSE: To provide an active noise eliminating system which can be fixed without additional operation by arranging a sound source for eliminating noise especially a sensor for residual noise without preventing the arrangement of the oth...
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JP2739863B2 |
PCT No. PCT/DE93/00968 Sec. 371 Date Jun. 12, 1995 Sec. 102(e) Date Jun. 12, 1995 PCT Filed Oct. 12, 1993 PCT Pub. No. WO94/10760 PCT Pub. Date May 11, 1994An echo compensation device, having a digital transverse filter, for an informati...
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JP2739811B2 |
PURPOSE: To provide a noise suppression system suppressing a noise superposed on a sound signal in a preprocess or a postprocess of encoding a sound. CONSTITUTION: A characteristic amount calculation circuit 150 calculates characteristic...
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JPH1098419A |
To reduce the deterioration in the characteristic of the echo canceller on the occurrence of a burst error and at changeover of echo paths. In this echo canceller 2 that uses an adaptive FIR filter 12 to estimate an echo path, generates ...
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JPH1093438A |
To obtain an economical device executing high bit rate decoding and high speed operation by allowing a comparator to consist of two units, to select an input voltage and a reference voltage, to join to mutual inverters and to compare the...
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JPH1091964A |
To secure desired precision in a waveform qualization employing a small scale circuit by conducting an adaptive arithmetic processing based on the reading samples outputted from respective prescribed delaying means and inputted reading s...
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JP2567536Y2 |
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JPH1083189A |
To stabilize the muffling function of an active type noise reducing device even when noise environment is changed. Whether a control system is in an emanating state or not is minitored by a emanating detecting means 45 based on a microph...
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JP2734196B2 |
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JP2727724B2 |
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JP2728120B2 |
PURPOSE: To reduce the occurrence period of howling and echo without need for training by a training voice signal when sudden fluctuation of a sneak signal pattern is caused due to fluctuation in a sneak signal path. CONSTITUTION: This c...
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JPH1075274A |
To reduce an arithmetic operation amount or a hardware scale in generating reliability information for soft judgement viterbi decoding by phase- rotating soft judgement data so as to correspond to transmission data components after delay...
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JP2725451B2 |
In multiplying an absolute value of a high frequency component of an input video signal and a gain selected from an aperture compensation gain and a noise cancel gain to carry out the aperture compensation and the noise cancel of the vid...
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JP2726668B2 |
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JP2725693B2 |
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JP2564309Y2 |
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JP2724472B2 |
An adaptive single-bit encoder and decoder has its adaptive function determined by dynamically dividing the message frequency band into delta-sigma and delta modulation regimes of operation. In a practical embodiment this is accomplished...
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JP2720845B2 |
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JP2718424B2 |
PURPOSE: To provide an optimum data detection method by setting a channel encoding bit cycle and a run length limit code rate, etc., to specified conditions relating to the detection means of partial response maximum likelihood data or t...
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JPH10501951A |
A signal amplification system wherein a signal coming from a microphone is applied to a loudspeaker via a signal processing system. The signal processing system includes an estimator for estimating the transfer function from the loudspea...
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JPH1042398A |
To obtain the moving feeling of a surround sound image without increasing processing amount for sound image control. This surround reproducing method makes pseudo reproduction of plural surround signals by plural speakers SPL, SPR and SP...
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JPH1042400A |
To reduce processing quantity for sound image control and to execute an effective sound image processing by dividing frequency data into data of two high and low frequency bands, converting them into the sound signals of time areas and i...
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JPH10501668A |
(57) [Summary] The present invention is an adaptive microphone device, one or more microphones (MP).1, ..., MPn), A signal detection device for detecting a target input signal, a signal forming device, and a signal storage means. The inp...
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JPH1028030A |
To provide an updating block which can process complex number coefficients without increasing the hardware so much mainly in the adaptive equalizer filter array of a RAM base. For a complex number, a coefficient updating expressions beco...
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JPH1028080A |
To provide an adaptive equalizing transversal filter which can be reduced in power consumption especially when it becomes necessary to equalize the transmission waveform of communication equipment deformed by the line characteristic, etc...
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JP2702876B2 |
PURPOSE: To provide a sound source detector which can locate the position of an aircraft in an airport, for example, correctly at a low cost. CONSTITUTION: A plurality of sound sensors S0, S1-S3..., S-1-S-3... for detecting a sound signa...
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JPH1011072A |
To reduce the scale of the noise controller by selecting and inputting the detection output of a noise detector detected by a signal selector to one adaptive filter, and composing a control sound to be applied to a control speaker. Noise...
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JPH1013317A |
To reduce hardware quantity required for multiplication by sharing a complex multiplying circuit in a replica signal generating part and a transmission path distortion estimating part. Change-over circuits 133, 115 and 121 are changed-ov...
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JP2697405B2 |
This invention relates to an equalizer for equalization of a linear modulated signal received in blocks or frames over a radio channel. The impulse response of the channel is estimated during training sequences before and after a frame a...
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JPH09330088A |
To obtain a silencer which can reduce coefficient update calculation quantity of an adaptive filter in noise control operation when plural noises exist. Microphones 1a-1d for detecting a noise is arranged at a noise generation source, an...
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JP2693020B2 |
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JPH09326729A |
To detect a reception signal with high accuracy without increasing a circuit scale of an echo canceller by using a post cursor tap coefficient of a discrimination feedback equalizer for a tap coefficient of an echo canceller. A discrimin...
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JPH09327100A |
To position a sound image with precision without enlarging a finite period impulse response(FIR) filter by permitting the FIR filter to execute an arithmetic operation for one of output signals from frequency dividing parts so as to exec...
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JPH09319381A |
To provide an active muffler capable of generating a muffling sound wave for a long term. A detecting microphone 10, four speakers 20a-20d, an evaluating microphone 30 from the upper stream side are arranged on a pipe path 1 that a noise...
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JPH09320006A |
To provide a silencing processing circuit whose weight can be reduced, which can be made compact and can effectively eliminating sound without causing howling. A storage circuit 1 stores a vibration sound N (0) due to the rotation of a d...
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JP2686115B2 |
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JP2685031B2 |
PURPOSE: To provide the method and device for noise elimination which shorten the convergence time and reduce the distortion (residual error) after convergence. CONSTITUTION: A second adaptive filter 6 receives a reference signal from an...
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JPH09312581A |
To suppress division required in a sub-successive min. square method concerning the improvement of a device for estimating the coefficient of an adaptive filter which simulates the impulse response of a signal transmitting system from a ...
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JPH09307402A |
To make the filter adaptive by specifying a digital filter algorithm so as to allow a noise frequency to approach a concerned signal frequency in the case that the remarkably high level noise is in existence in a signal channel. An input...
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JP2682932B2 |
In an image processing system, an apparatus for adaptively selecting three-dimensional sub-band image signal includes a circuit for obtaining energy of each sub-band of the three-dimensional sub-band signals, a circuit for extracting sub...
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JP2683490B2 |
PURPOSE: To accelerate the adapting time of an adaptive noise cancellation device by convoluting signals from a reference input with a filter having a prescribed number of taps and repetitively deciding the tap factor which minimizes the...
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JP2682617B2 |
Equalizers, which provide distortion compensation for a modulated carrier signal having a time-varying signal envelope, are adjusted at selected times in response to the signal envelope and the data signals regenerated therefrom. Each se...
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