AR008648A1 - A BACKGROUND NOISE SUPPRESSOR FOR A SIGNAL AND A METHOD FOR SUPPRESSING BACKGROUND NOISE PRESENT IN AN AUDIO SIGNAL USING SUCH SUPPRESSOR. - Google Patents

A BACKGROUND NOISE SUPPRESSOR FOR A SIGNAL AND A METHOD FOR SUPPRESSING BACKGROUND NOISE PRESENT IN AN AUDIO SIGNAL USING SUCH SUPPRESSOR.

Info

Publication number
AR008648A1
AR008648A1 ARP970104500A ARP970104500A AR008648A1 AR 008648 A1 AR008648 A1 AR 008648A1 AR P970104500 A ARP970104500 A AR P970104500A AR P970104500 A ARP970104500 A AR P970104500A AR 008648 A1 AR008648 A1 AR 008648A1
Authority
AR
Argentina
Prior art keywords
suppressor
speech
noise
background noise
present
Prior art date
Application number
ARP970104500A
Other languages
Spanish (es)
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/921,492 external-priority patent/US6122384A/en
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of AR008648A1 publication Critical patent/AR008648A1/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L21/0232—Processing in the frequency domain
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding

Abstract

Un supresor del ruido de fondo de una senal para la supresion del ruído en una disposicion de procesamiento de la locucion, que comprende un estimador deganancia determina la ganancia y de este modo el nivel de la supresion del ruído, para cadamarco de la senal de entrada. Si el habla no está presente enel marco, entonces se fija la ganancia en un mínimo predeterminado. Si el habla está presente en el marco, entonces se determina un factor de ganancia paracada canal, el factor de gananciaes una funcion del SNR del habla en el canal. Los canales SNRs están generados mediante un estimador SNR basado en lasestimaciones de energía de canal provistas por un estimador de energía y las estimaciones de energía de ruído de canal provistaspor un estimador de energíade ruído. El estimador de energía de ruído actualiza sus estimaciones durante los marcos en los cuales el habla no está presente, segun se determina medianteun detector del habla. La invencion también se refiere a un método para suprimir el ruido de fondo presente en una senal de audio que utiliza dichosupresor.A noise background suppressor of a signal for noise suppression in a speech processing arrangement, comprising a gain estimator determines the gain and thus the level of noise suppression, for each frame of the input signal . If speech is not present in the frame, then the gain is set at a predetermined minimum. If speech is present in the frame, then a gain factor is determined for each channel, the gain factor is a function of the speech SNR on the channel. The SNR channels are generated by an SNR estimator based on the channel energy estimates provided by an energy estimator and the channel noise energy estimates provided by a noise energy estimator. The noise energy estimator updates its estimates during frames in which speech is not present, as determined by a speech detector. The invention also relates to a method of suppressing background noise present in an audio signal using said suppressor.

ARP970104500A 1997-09-02 1997-09-30 A BACKGROUND NOISE SUPPRESSOR FOR A SIGNAL AND A METHOD FOR SUPPRESSING BACKGROUND NOISE PRESENT IN AN AUDIO SIGNAL USING SUCH SUPPRESSOR. AR008648A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US3904097A 1997-09-02 1997-09-02
US08/921,492 US6122384A (en) 1997-09-02 1997-09-02 Noise suppression system and method

Publications (1)

Publication Number Publication Date
AR008648A1 true AR008648A1 (en) 2000-02-09

Family

ID=56289794

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP970104500A AR008648A1 (en) 1997-09-02 1997-09-30 A BACKGROUND NOISE SUPPRESSOR FOR A SIGNAL AND A METHOD FOR SUPPRESSING BACKGROUND NOISE PRESENT IN AN AUDIO SIGNAL USING SUCH SUPPRESSOR.

Country Status (1)

Country Link
AR (1) AR008648A1 (en)

Similar Documents

Publication Publication Date Title
US8259972B2 (en) Hearing aid adapted to a specific type of voice in an acoustical environment, a method and use
JP4279357B2 (en) Apparatus and method for reducing noise, particularly in hearing aids
US7106871B1 (en) Feedback cancellation using bandwidth detection
DK1453194T3 (en) Method of automatic gain adjustment in a hearing aid as well as a hearing aid
ES2133281T3 (en) DEVICE TO IMPROVE THE INTELLIGIBILITY OF A PUBLIC HEARING SYSTEM.
US20040258262A1 (en) Hearing aid
ATE455431T1 (en) HEARABILITY IMPROVEMENT
KR890702356A (en) Noise suppression system
DK0719439T3 (en) Voice Activity Detector
FI955947A (en) Noise attenuator and method for attenuating background noise from noisy speech as well as a mobile station
SE9704552D0 (en) Noise reduction method and apparatus
ES2145429T3 (en) NOISE SUPPRESSION PROCEDURE FOR SPECTRAL SUBSTRACTION.
CA2544974A1 (en) Method and apparatus for directional enhancement of speech elements in noisy environments
MY133057A (en) Methods and apparatus for improved echo suppression in communications systems
Ternström Hearing myself with others: Sound levels in choral performance measured with separation of one's own voice from the rest of the choir
ES2141236T3 (en) HIDDEN TRANSMISSION ERROR.
ATE261170T1 (en) CONTROLLED ACOUSTIC WAVEGUIDE FOR SOUND ATTENUATION
AU7345591A (en) Tinnitus masking device
ES2142543T3 (en) PERCEPTIVE AUDIO COMPRESSION BASED ON THE UNCERTAINTY OF SOUND VOLUME.
DK0517322T3 (en) Hearing aid to place inside the ear canal
SE9700533L (en) Variable amplifier optical amplifier
KR960701427A (en) A noise reduction system and apparatus, a noise reduction system and a mobile radio station,
ATE34268T1 (en) HEARING AID.
ES2047664T3 (en) VOICE ACTIVITY DETECTION.
ES2142544T3 (en) TONE FOR PERCEPTIVE AUDIO COMPRESSION BASED ON THE UNCERTAINTY OF SOUND VOLUME.