KR970019524A

KR970019524A - Ambient sound adaptive stereo sound volume / balance adjustment circuit

Info

Publication number: KR970019524A
Application number: KR1019950033350A
Authority: KR
Inventors: 박현수
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1995-09-30
Filing date: 1995-09-30
Publication date: 1997-04-30

Abstract

본 발명은 음성처리IC와, 마이콤과 키입력부를 구비한 텔레비젼 수상기에 있어서, 수상기에 부착된 L, R마이크로 입력되는 소음과 증폭기의 L, R음성신호로부터 L,R 신호 대 잡음비를 구하기 위한 제1 및 제2감산기(24,25) 제1 및 제2감산기에서 출력되는 L신호대 잡음비와 R신호 대 잡음비를 비교하기 위한 비교기(26), 비교기의 비교 결과, L, R신호의 신호 대 잡음비가 동일하게 변화할 경우 볼륨을 조정하도록 제어하고, L, R신호의 신호 대 잡음비가 동일하게 변화하지 않을 경우 볼륨 및 밸런스를 조정하도록 제어하는 볼륨/밸런스 처리부(27)와, 마이콤으로 부터 출력되는 볼륨의 크기 및 밸런스의 크기와 볼륨/밸런스 처리부에서 출력되는 볼륨의 크기 및 밸런스의 크기를 가산하여 증폭기의 이득으로 출력하기 위한 제1 및 제2가산기(30,31)를 구비하여, 소음원의 크기 및 위치에 상관없이 시청자들에게 잡음이없는 스테레오 사운드를 제공할 수 있다.The present invention relates to a television receiver having a voice processing IC, a microcomputer and a key input unit, for obtaining an L, R signal-to-noise ratio from L and R audio signals of an amplifier and L and R audio signals attached to the receiver. First and second subtractors 24 and 25 Comparators 26 for comparing the L signal-to-noise ratio and the R signal-to-noise ratio output from the first and second subtractors, and as a result of the comparison of the comparator, the signal-to-noise ratios of the L and R signals Volume / balance processing unit 27 for controlling the volume to be adjusted if the same change, and for adjusting the volume and balance if the signal-to-noise ratios of the L and R signals are not the same, and the volume output from the microcomputer. A first and second adders 30 and 31 for adding the magnitude and the balance of the volume and the magnitude of the volume and the balance of the volume output from the volume / balance processing unit to output the gain of the amplifier. It is possible to provide stereo sound, there is no noise to viewers regardless of size and location.

Description

Ambient sound adaptive stereo sound volume / balance adjustment circuit.

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 텔레비젼 수상기에 있어서 종래의 주변음 적응 스테레오사운드 볼륨 조정회로를 나타낸 블록도.1 is a block diagram showing a conventional ambient sound adaptive stereo sound volume adjusting circuit in a television receiver.

제2도는 텔레비젼 수상기에 있어서 본 발명에 의한 스테레오사운드 볼륨/밸런스 조정회로를 나타낸 블럭도.2 is a block diagram showing a stereo sound volume / balance adjusting circuit according to the present invention in a television receiver.

Claims

Amplifying the voice signal, the voice intermediate frequency amplification, and the frequency modulation / demodulation operation on the input voice signal, and the volume and balance of the L and R voice signals output from the voice processing IC with a predetermined gain, respectively. Amplifier for outputting to L and R speakers, and various video and audio control, channel selection, PIP board control, power on / off, voice mode selection, A / V switching and OSD etc. A television receiver having a key input unit for applying a control command to the microcomputer, comprising: a L / R signal-to-noise ratio obtained from a L and R microphone input signal attached to the receiver and an L and R audio signal of an amplifier; First and second subtractors 24, 25; A comparator (26) for comparing the L signal to noise ratio and the R signal to noise ratio output from the first and second subtractors; As a result of the comparison of the comparator, if the signal-to-noise ratios of the L and R signals are the same, the control is performed to adjust the volume. If the signal-to-noise ratios of the L and R signals are not the same, the control is performed to adjust the volume and the balance. A volume / balance processing unit 27; And first and second adders 30 for adding the magnitude and balance of the volume output from the microcomputer and the magnitude and balance of the volume output from the volume / balance processing unit to output the gain of the amplifier. 31) A surround sound adaptation stereo sound volume / balance adjustment circuit characterized in that it comprises.

※ Note: The disclosure is based on the initial application.