KR970012536A - Echo / accompaniment correction device and method - Google Patents

Echo / accompaniment correction device and method Download PDF

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Publication number
KR970012536A
KR970012536A KR1019950025771A KR19950025771A KR970012536A KR 970012536 A KR970012536 A KR 970012536A KR 1019950025771 A KR1019950025771 A KR 1019950025771A KR 19950025771 A KR19950025771 A KR 19950025771A KR 970012536 A KR970012536 A KR 970012536A
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South Korea
Prior art keywords
echo
accompaniment
gain
signal
peak value
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KR1019950025771A
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Korean (ko)
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이경재
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구자홍
Lg 전자주식회사
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Priority to KR1019950025771A priority Critical patent/KR970012536A/en
Publication of KR970012536A publication Critical patent/KR970012536A/en

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Abstract

본 발명은 가라오케 시스템에서 마이크로 입력되는 신호의 레벨에 따라 에코와 반주 음량을 자동으로 조절하여 보다 더 자연스러운 가라오케 효과를 얻도록 한 마이크 입력 레벨에 따른 에코/반주음 보정 장치 및 그 방법에 관한 것이다.The present invention relates to an echo / accompaniment correction device and method according to a microphone input level to automatically adjust echo and accompaniment volume according to the level of a signal input to a microphone in a karaoke system to obtain a more natural karaoke effect.

이러한 본 발명은 일정 시간 간격으로 저역 필터링된 음성신호의 피크치를 샘플링하고, 샘플링된 음성신호의 피크치가 소정 시간에서 일정개 이상이면 N번째 샘플을 취해서 평균 이득값으로 에코와 반주음의 이득 조절 신호를 산출하여 에코 및 반주음의 이득을 조절하게 되는 것이다.In the present invention, the peak value of the low-pass filtered speech signal is sampled at predetermined time intervals, and if the peak value of the sampled speech signal is a predetermined number or more at a predetermined time, the N-th sample is taken, and the gain control signal of the echo and accompaniment sound is averaged. To calculate the gain of the echo and accompaniment.

Description

에코(Echo)/반주음 보정장치 및 그 방법Echo / accompaniment correction device and method

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

제2도는 본 발명에 의한 에코/반주음 보정장치 구성도,2 is a block diagram of an echo / accompaniment sound correction device according to the present invention;

제3도는 제2도의 피크치 검출부 상세회로도,3 is a detailed circuit diagram of the peak value detector of FIG.

제4도는 제2도의 에코 및 반주음 이득 조정부 상세회로도.4 is a detailed circuit diagram of the echo and accompaniment gain adjusting unit of FIG.

Claims (6)

전치 증폭된 음성신호로부터 피크치를 검출하는 피크치 검출수단과, 상기 피크치 검출수단에서 출력되는 음성신호의 피크치를 저역 필터링하는 저역 필터와, 상기 저역 필터에서 출력되는 신호를 디자탈 신호로 변환하는 아날로그/디지탈 변환수단과, 상기 아날로그/디지탈 변환수단에서 출력되는 음성신호의 피크치에 따라 에코 및 반주음 이득 조절신호를 출력하고 동시에 해당곡의 미디 데이터를 출력하는 마이콤과, 상기 마이콤에서 출력되는 에코 이득 조절신호에 따라 에코 발생수단에서 발생된 에코의 이득을 조절하는 에코 이득 조정수단과, 상기 에코 이득 조정수단에서 출력되는 에코와 상기 전치 증폭된 음성신호를 혼합하는 제1혼합 수단과, 상기 마이콤에서 출력되는 반주음 이득 조절신호에 따라 음원 모듈과 디지탈/아날로그 변환수단을 순차 통한 반주음의 이득을 조절하여 출력하는 반주음 이득 조정수단과, 상기 제1혼합수단 및 반주음 이득 조정수단에서 각각 얻어지는 반주음과 에코 및 음성신호를 혼합하여 스프커로 송출될 수 있도록 증폭부에 전달하는 제2혼합수단을 포함하여 구성된 것을 특징으로 하는 에코/반주음 보정장치.Peak value detection means for detecting peak values from the pre-amplified voice signal, a low pass filter for low pass filtering the peak value of the audio signal output from the peak value detection means, and an analog / converting signal for outputting the signal output from the low pass filter into a digital signal; A digital conversion means, a microcomputer for outputting an echo and accompaniment gain control signal according to the peak value of the audio signal output from the analog / digital conversion means and simultaneously outputting MIDI data of the corresponding song, and an echo gain control output from the microcom Echo gain adjusting means for adjusting the gain of the echo generated by the echo generating means in accordance with the signal, first mixing means for mixing the echo output from the echo gain adjusting means and the preamplified voice signal, and outputting from the micom Sound source module and digital / analog conversion means in accordance with the accompaniment gain control signal Accompaniment gain adjustment means for adjusting and outputting the gain of the accompaniment sound sequentially, and amplifying the accompaniment sound obtained by the first mixing means and the accompaniment sound gain adjusting means, and the echo and voice signals to be sent to the spurs. Echo / accompaniment sound correction device comprising a second mixing means for transmitting to the unit. 제1항에 있어서, 상기 피크치 검출수단은 입력되는 음성신호를 반파 정류하는 다이오드와, 상기 다이오드에서 반파 정류된 신호를 평활시키는 평활 콘덴서와, 상기 평활 콘덴서에서 출력된 신호를 비반전 증폭하여 입력 음성신호의 피크치로 출력하는 비반전 증폭기로 구성된 것을 특징으로 하는 에코/반주음 보정장치.2. The apparatus of claim 1, wherein the peak value detecting means comprises: a diode for half-wave rectifying the input audio signal, a smoothing capacitor for smoothing the half-wave rectified signal from the diode, and an input voice by non-inverting amplifying the signal output from the smoothing capacitor. Echo / accompaniment correction device characterized in that the non-inverting amplifier for outputting the peak value of the signal. 일정 시간 간격(△t=d/12)으로 저역 필터링된 음성신호의 피크치(Lo)를 샘플링하는 제1과정과, 상기 샘플링된 음성신호의 피크치가 소정 시간(ti)에서 일정개(N) 이상이면 N번째 샘플을 취해서 평균 이득값을 산출하는 제2과정과, 상기 산출한 평균 이득값으로 에코와 반주음의 이득 조절신호(EVCNTL, MVCNTL)를 산출하여 에코 및 반주음의 이득을 조절하는 제3과정과, 사기 소정시간(ti)에 음성신호 피크치의 샘플이 일정개(N) 이하일 경우에는 상기 산출한 에코/반주음 이득 조절신호 초기값으로 에코 및 반주음의 이득을 조절하는 제4과정으로 이루어짐을 특징으로 하는 에코/반주음 보정방법.A first process of sampling the peak value Lo of the low-pass filtered speech signal at a predetermined time interval (Δt = d / 12), and the peak value of the sampled speech signal is a predetermined number N or more at a predetermined time ti. And a second step of taking the N-th sample to calculate the average gain value, and calculating the gain control signals EVCNTL and MVCNTL of the echo and accompaniment sound using the calculated average gain value to adjust the gain of the echo and accompaniment sound. Step 3, and fourth step of adjusting the gain of the echo and accompaniment by the calculated echo / accompaniment gain control signal initial value when the sample of the audio signal peak value is less than or equal to the predetermined number N at a predetermined time ti. Echo / accompaniment sound correction method characterized in that consisting of. 제3항에 있어서, 상기 제2과정은 평균 이득값[A(i)은L(k)/N에 의해 산출하는 것을 특징으로 하는 에코/반주음 보정방법.The method of claim 3, wherein the second process is performed such that the average gain value A (i) is The echo / accompaniment correction method characterized by calculating by L (k) / N. 제3항에 있어서, 상기 제3과정에서 에코 이득 조절신호 EVCNTL(i)는 EVCNTL(i)=MVCNTLo*ke/A(i)에 의해 산출하는 것을 특징으로 하는 에코/반주음 보정방법.The method of claim 3, wherein the echo gain control signal EVCNTL (i) is calculated by EVCNTL (i) = MVCNTLo * ke / A (i) in the third process. 제3항에 있어서, 상기 제3과정에서 반주음 이득 조절신호 MVCNTL(i)=MVCNTLo*km*A(i)에 의해 산출하는 것을 특징으로 하는 에코/반주음 보정방법.4. The echo / accompaniment correction method according to claim 3, wherein the accompaniment gain control signal MVCNTL (i) = MVCNTLo * km * A (i) is calculated in the third process. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950025771A 1995-08-21 1995-08-21 Echo / accompaniment correction device and method KR970012536A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030026745A (en) * 2001-09-28 2003-04-03 주식회사 금영 An apparatus and a method for controlling echo using output signal of an accompaniment machine as music
KR100386920B1 (en) * 1998-09-22 2003-06-09 야마하 가부시키가이샤 Device for processing a microphone signal of a karaoke apparatus
KR100778201B1 (en) * 2000-08-23 2007-11-22 신세다이 가부시끼가이샤 Karaoke device with built-in microphone and microphone therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100386920B1 (en) * 1998-09-22 2003-06-09 야마하 가부시키가이샤 Device for processing a microphone signal of a karaoke apparatus
KR100778201B1 (en) * 2000-08-23 2007-11-22 신세다이 가부시끼가이샤 Karaoke device with built-in microphone and microphone therefor
KR20030026745A (en) * 2001-09-28 2003-04-03 주식회사 금영 An apparatus and a method for controlling echo using output signal of an accompaniment machine as music

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