Class 381/94.4 - Interpolation

Subclass of Class 381 - Electrical audio signal processing systems and devices
Definition: Subject matter in which a segment of a desired signal which
No. of patents: 25
Last issue date: 02/28/2012

Number	Title	Issue Date
8126162	Audio signal interpolation method and audio signal interpolation apparatus An audio signal interpolation apparatus is configured to perform interpolation processing on the basis of audio signals preceding and/or following a predetermined segment on a time axis so as to obtain an audio signal corresponding to the predetermined segment. The ...	02/28/2012
7978862	Method and apparatus for audio signal processing A sampled digital audio signal is displayed on a spectrogram, in terms of frequency vs. time. An unwanted noise in the signal is visible in the spectrogram and the portion of the signal containing the unwanted noise can be selected using time and frequency constrain...	07/12/2011
7436968	Adaptive noise reduction method and device An adaptive noise reduction method and apparatus capable of reducing efficiently variable period noise from a main input is provided. The pitch of a noise waveform to be reduced can be variable with a change in a period of motor noise occurring when the revolution p...	10/14/2008
7409339	Methods and systems for sample rate conversion Methods and systems for sample rate conversion convert a sampled signal to a higher data rate signal. Conversion pulses are received, having a conversion rate that is higher than the sample rate of the sampled signal. Sample points are then reconstructed from the sa...	08/05/2008
7327840	Loudspeaker telephone equalization method and equalizer for loudspeaker telephone An equalizer for a loudspeaker telephone includes a signal generator for generating a reference signal for broadcast by a loudspeaker of the loudspeaker telephone. A filter alters the frequency response of signals prior to broadcast by the loudspeaker. During set-up...	02/05/2008
7239710	Stereo radio receiver with noise suppression For the purpose of largely suppressing the noise pulses caused in a stereo radio receiver in the reception signal, particularly by the ignition system of a motor vehicle, a digital field strength signal representing the analog field strength signal is produced for e...	07/03/2007
7224853	Method and apparatus for resampling data A set of known data samples are identified and an approximation of an original function from which the known data samples were obtained is created. The approximation function is then resampled to obtain desired values that are not contained in the set of known data ...	05/29/2007
7180435	Low-complexity sampling rate conversion method and apparatus for audio processing A low-complexity sampling rate conversion (SRC) method and apparatus for the processing of digital audio signals. A first stage upsamples an input audio signal to generate an upsampled audio signal. For example, the first stage may perform 1:2 upsampling using a hal...	02/20/2007
7013015	Method for the operation of a hearing aid device or hearing device system as well as hearing aid device or hearing device system For reducing feedback-conditioned oscillations in a hearing aid device, microphone signals of a first microphone and of a distanced, second microphone are compared to one another. When oscillations are detected at the same frequency in both microphone signals, these...	03/14/2006
7003272	Radio apparatus with adjustable reception quality A radio apparatus (95), particularly for mobile radio, which makes it possible to adjust the signal reception in a predeterminably optimized way is proposed. The radio apparatus (95) includes a receiver part (1) and an evaluation unit (5)...	02/21/2006
6952444	Blind DFE and phase correction The digital communications receiver receives an analog signal, modulated with digital information. The receiver converts the analogue signal to a digital signal, and demodulates the digital signal to recover the complex valued components of the transmitted digital s...	10/04/2005
6907144	Noise reduction method, apparatus, and program for digital image processing A method of processing a digital image channel to remove noise, includes the steps of: identifying a pixel of interest; calculating a noise reduced pixel value from a single weighted average of the pixels in a sparsely sampled local region including the pixel of int...	06/14/2005
6795559	Impulse noise reducer detecting impulse noise from an audio signal An impulse noise reducer detects impulse noise in an audio signal by detecting and smoothing the high-frequency amplitude of the audio signal, attenuating the non-smoothed amplitude according to the smoothed amplitude, and comparing the attenuated amplitude with a t...	09/21/2004
6744703	Continuous recording apparatus by interpolating the audio signal during seeking operation In an apparatus for recording continuous information of sound or the like, when a disk device generating a seek sound is used as recording means, such state is prevented that seek sound is mixed as noise and is recorded. In an input processing system of an audio sig...	06/01/2004
6654469	Methods and devices for reducing sampling noise in analog signals using linear interpolation Sampling noise in an analog signal output from a codec, such as a speech codec, is reduced using linear interpolation. The output of a codec is input into two sample and hold circuits. The circuits generate two output signals (i.e. voltages) for each inpu...	11/25/2003
6654471	Method, equipment and recording device for suppressing pulsed interference in analogue audio and/or video signals Clicks in voice and music signals are removed by detecting and interpolating the click. The use of a permanently set threshold value above the peak value of the audio signal is known for detecting the clicks, and interpolation carried out on the basis of ...	11/25/2003
5825899	Audio data processing apparatus A data processing circuit inputs and connects a plurality of digital audio input channels in parallel, time-divisionally individually processes data of each input channel at every period Tu that is determined by a standardized united sampling frequency 44...	10/20/1998
5586192	Method of and device for detecting pulsatory interference signals in a sound signal For detecting pulsatory interference in a sampled audio signal, the value of a given signal sample is compared with the values of previous as well as subsequent signal samples within a selected time window. If the given sample, multiplied by a selected at...	12/17/1996
5568558	Adaptive noise cancellation device An adaptive noise cancellation device comprises: convolution logic (10) for convolving the signal from a reference input (x) with a discretized L-tap filter to form a filtered reference signal; and logic (20) for subtracting the filtered reference signal ...	10/22/1996
5563954	Microphone apparatus A reference microphone is disposed close to a primary microphone through an enclosure wall of an appliance incorporating microphones, and a noise generated by mechanical systems and included in an output of the primary microphone is canceled by an adaptiv...	10/08/1996
5245667	Method and structure for synchronizing multiple, independently generated digital audio signals A method for synchronizing multiple digital signals is disclosed herein which synchronizes samples of audio information generated by independent digital audio sources to a single master sampling clock reference. An interpolation filter associated with eac...	09/14/1993
4851934	Analog signal synthesizing processing circuit with periodic noise compensation An analog signal synthesizing processing circuit with a periodic noise compensation generates analog signal of a plurality of audio signals and so forth containing noise generated almost periodically, for example by head switching of VTR, and plurality of...	07/25/1989
4648118	Apparatus for reducing noise in audio signals In a rotary head magnetic recording and reproducing system of a helical-scan type for successively recording and reproducing audio signals in and from record patterns on a magnetic tape, which record patterns are inclined relative to the longitudinal dire...	03/03/1987
4501014	Method for eliminating unwanted acoustic signals in audio programs to be edited for reproduction A method is proposed for eliminating or suppressing unwanted acoustic signals in audio programs to be edited for reproduction in studios, in which the perceived disrupted segments in the signal are determined with respect to their time positions, and the ...	02/19/1985
3947636	Transient noise filter employing crosscorrelation to detect noise and autocorrelation to replace the noisey segment A method and circuit for detecting transient noise pulses having predetermined characteristics which are contained in an input signal, and substituting for the portion of the input signal distorted by the noise pulse, an estimate of that portion based upo...	03/30/1976

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Class 381/94.4 - Interpolation