Method and apparatus for improving noise discrimination using enhanced phase difference value

A phase difference and noise technology, applied in angle demodulation through phase difference detection, stereo system, quasi-stereo system, etc., can solve problems such as narrow zero position
CN101288335AInactive Publication Date: 2008-10-15DOLBY LAB LICENSING CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DOLBY LAB LICENSING CORP
Publication Date
2008-10-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

Noise discrimination in signals from a plurality of sensors is conducted by enhancing the phase difference in the signals such that off-axis pick-up is suppressed while on-axis pick-up is enhanced. Alternatively, attenuation / expansion are applied to the signals in a phase difference dependent manner, consistent with suppression of off-axis pick-up and on-axis enhancement. Nulls between sensitivity lobes are widened, effectively narrowing the sensitivity lobes and improving directionality and noise discrimination.
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Description

Method and device for improving noise recognition using enhanced phase difference value Technical field The present invention relates to noise discrimination in signal detection and processing. Background technique FIG. 1 is a block diagram of a conventional real-time frequency domain signal processing system 10 using a frequency sub-band method or a frame-overlap-and-add method sometimes referred to as a frequency sub-band method. This method uses the circuit 11 to divide the input sampling time signal information into a plurality of data blocks called frames. It can be directly provided from a digital sensor or other processing system, or can provide sampled data from an analog sensor or processing system through a standard analog-to-digital conversion (A / D or ADC) method (not shown). These frames can be adjacent or overlapped. Because the data are samples of time domain data, all samples in the frame do not have imaginary parts, and the data is strictly "real numbers". If req...

Claims

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