Signal processing method and apparatus, and recording medium in which a signal processing program is recorded

a signal processing and signal processing technology, applied in the direction of transducer casings/cabinets/supports, electrical transducers, instruments, etc., can solve the problem that the user of the receiver terminal b>9000/b> should catch a low-quality voice with a high background nois

Inactive Publication Date: 2008-09-11
NEC CORP
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  • Abstract
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Benefits of technology

[0012]Moreover, another objective of the present invention is to provide method, apparatus and program for s...

Problems solved by technology

Moreover, the most comfortable combination of residual noise and output distortion is different from user to user, so that it is impossible to preset audio quality that satisfies a plurality of users.
However, the conventional configuration described with reference to FIG. 29 does not allow a user to operate the noise suppressor 710 because it is placed temporally and spatially remote from the user.
Accordingly, when a high res...

Method used

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  • Signal processing method and apparatus, and recording medium in which a signal processing program is recorded
  • Signal processing method and apparatus, and recording medium in which a signal processing program is recorded
  • Signal processing method and apparatus, and recording medium in which a signal processing program is recorded

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[0045]FIG. 1 is a block diagram showing the best mode for carrying out the present invention. FIG. 1 is similar to a prior art of FIG. 29 except as a receiver terminal 9001. The operation will be described in detail hereinbelow focusing upon the difference.

[0046]In FIG. 1, a noise suppressor 940 is provided as post-processing of the decoder 920 in FIG. 29. The noise suppressor 940 receives a decoded signal from the decoder 920, and suppresses a residual noise and a noise added by CNG in the decoder 920. The noise-suppressed signal is supplied to the output terminal 900.

[0047]FIG. 2 shows a configuration of the noise suppressors 710 and 940. Since these noise suppressors can have the same configuration, the following description will be made with reference to the noise suppressor 940. A decoded signal supplied from the decoder 920 to the noise suppressor 940 is supplied to the input terminal 1 in FIG. 2 as a sequence of sampled values of a deteriorated voice signal (a signal having d...

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Abstract

A signal processing method for converting a signal received via a transmission path or read from a storage medium into a first audible signal, and suppressing a noise other than a desired signal contained in the first audible signal based on predetermined audio quality adjustment information, comprising steps of: in suppressing a noise other than a desired signal contained in the first audible signal to generate an enhanced signal, receiving audio quality adjustment information for adjusting audio quality; and adjusting audio quality of the enhanced signal using the audio quality adjustment information

Description

INCORPORATION BY REFERENCE[0001]This application claims the priority based on a Japanese Patent Application No. 2007-55146 filed on Mar. 6, 2007, disclosure of which is incorporated herein in its entirety by reference.BACKGROUND ART[0002]The present invention relates to method, apparatus and program for signal processing that realizes a function of suppressing a noise superposed over a desired voice signal, and more particularly to method, apparatus and program for signal processing for performing suppression at a position close to a reproducing device such as a speaker.[0003]Conventionally, a noise suppressor (noise suppression system) is a system for suppressing a noise superposed over a desired voice signal, and in general, it operates to suppress a noise mixed in a desired voice signal by estimating a power spectrum of a noise component using an input signal converted into a frequency domain, and subtracting the estimated power spectrum from the input signal. By estimating the p...

Claims

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Application Information

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IPC IPC(8): H04B15/00G10L21/0208
CPCG10L21/0208G10L19/265
Inventor SUGIYAMA, AKIHIKOKATO, MASANORI
Owner NEC CORP
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