KR970003040B1 - A circuit for converting sound of a surround system - Google Patents

A circuit for converting sound of a surround system Download PDF

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Publication number
KR970003040B1
KR970003040B1 KR1019920020494A KR920020494A KR970003040B1 KR 970003040 B1 KR970003040 B1 KR 970003040B1 KR 1019920020494 A KR1019920020494 A KR 1019920020494A KR 920020494 A KR920020494 A KR 920020494A KR 970003040 B1 KR970003040 B1 KR 970003040B1
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South Korea
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pass filter
low
operational amplifier
voice
resistor
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KR1019920020494A
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Korean (ko)
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KR940013184A (en
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이용원
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대우전자 주식회사
배순훈
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H04N5/607—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for more than one sound signal, e.g. stereo, multilanguages

Abstract

A voice conversion circuit of multi-function surround system using an operational amplifier includes a resistor unit 40 which consists of resistors R1, R2, R5, R6, R10 and R11 and outputs a voice signal inputted from left and right voice signal output ports L and R, a low pass filter 10 for filterting the low frequency component of the voice signal sent from the resistor unit 40, a low and high pass filter 20 for combining the low frequency component and high frequency component of the voice signal sent from the resistor unit 40, a buffer 30 for allowing the combined signals of the left and right voice signals to have an identical gain, and switch 50 for selecting one of a plurality of surround signals inputted through input ports S1, S2 and S3 according to control signals C1 and C2.

Description

연산증폭기를 사용한 다기능 서라운드 시스템의 음성변환회로Voice conversion circuit of multifunctional surround system using operational amplifier

제1도는 종래의 음성변환회로도.1 is a conventional voice conversion circuit diagram.

제2도는 본 발명에 따른 연산증폭기를 사용한 다기능 서라운드 시스템에서의 음성변환회로도.2 is a voice conversion circuit diagram of a multifunctional surround system using an operational amplifier according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 저역통과필터부 11 : 제1저역필터10: low pass filter 11: the first low pass filter

12 : 제2저역필터 20 : 저역, 고역필터부12: second low pass filter 20: low pass, high pass filter

21 : 고역필터 22 : 저역필터21: high pass filter 22: low pass filter

30 : 버퍼부 40 : 저항단30: buffer portion 40: resistance stage

50 : 스위칭부 60 : 시간 지연용 딜레이회로50: switching unit 60: time delay delay circuit

100 : 음성변환회로 A,B,C : 연산증폭기100: voice conversion circuit A, B, C: operational amplifier

본 발명은 텔레비젼의 서라운드 시스템에 관한 것으로, 특히 저역 필터부, 저역, 고역 필터부 및 버퍼부로 구성된 음성변환회로와 스위칭부를 삽입하여 평활된 주파수특성을 갖도록 하고, 저음 강조 및 음의 입체감을 충실히 재현시킬 수 있도록 음질을 다양화 할 수 있게 한 연산증폭기를 사용한 다기능 서라운드 시스템의 음성변환회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surround system of a television. In particular, a voice conversion circuit composed of a low pass filter unit, a low pass filter, a high pass filter unit and a buffer unit and a switching unit are inserted to have smooth frequency characteristics, and faithfully reproduces bass emphasis and sound stereoscopic feeling. The present invention relates to a voice conversion circuit of a multi-function surround system using an operational amplifier that allows the sound quality to be diversified.

종래의 다기능 서라운드 시스템(Surround System)은, 제1도에 도시된 바와 같이, 좌,우 스피커로 입력되는 음성신호(L, R)를 합성 또는 차(差)의 성분으로 서라운딩시키고, 지연회로를 사용하여 지연된 서라운드신호를 출력시켜 왔었다.Conventional multi-function surround system (Surround System), as shown in Figure 1, surrounds the audio signal (L, R) input to the left and right speakers to the synthesis or difference components, delay circuit Has been used to output delayed surround signals.

이 서라운드신호는 음성신호의 합성 및 차에 의한 음검출신호이기 때문에, 음의 현장감이 떨어지며, 선택할 수 있는 음질이 단일하여, 소비자가 선택할 수 없는 불리함이 있어 왔다.Since the surround signal is a sound detection signal due to the synthesis and difference of audio signals, there is a disadvantage in that the presence of sound is inferior, the sound quality that can be selected is single, and consumers cannot select it.

본 발명은 위의 문제점을 해소하기 위해 안출된 것으로, 저역 필터부, 저역, 고역 필터부 및 버퍼부로 구성된 음성변환회로와 스위칭부를 삽입하여 평활된 주파수특성을 갖도록 하고, 저음 강조 및 음의 입체감을 충실히 재현시킬 수 있도록 음질을 다양화 할 수 있게 한 연산증폭기를 사용한 다기능 서라운드 시스템의 음성변환회로를 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, by inserting a voice conversion circuit and a switching unit consisting of a low pass filter, a low pass, a high pass filter and a buffer portion to have a smooth frequency characteristics, bass emphasis and sound stereoscopic Its purpose is to provide a voice conversion circuit for a multifunctional surround system using an operational amplifier that can diversify the sound quality for faithful reproduction.

이하, 첨부된 도면들을 참조하여 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

제2도는 본 발명에 따른 연산증폭기를 사용한 다기능 서라운드 시스템의 음성변환회로도이다.2 is a voice conversion circuit diagram of a multifunctional surround system using an operational amplifier according to the present invention.

제2도에 도시된 바대로, 본 발명에 따른 연산증폭기를 사용한 다기능 서라운드 시스템의 음성변환회로는 일단의 저항들(R1, R2, R5, R6, R10, R11)로 이루어져, 좌, 우 음성신호 출력단(L, R)으로부터 입력되는 음성신호를 출력하는 저항단(40) 상기 저항단(40)으로부터 출력된 음성신호의 저주파 성분을 여파하여 출력시키는, 저역 필터부(10), 상기 저항단(40)으로부터 출력된 음성신호의 저주파 성분과 고주파 성분을 합성하여 출력하는 저역, 고역 필터부(20), 좌, 우 음성신호의 합성신호가 동등한 이득을 가지도록 하여 출력하는 버퍼부(30), 입력되는 제어신호(C1, C2)에 의해 입력단자들(S1, S2, S3)을 통해 입력된 다수개의 서라운드 신호를 선택하여 출력하는 스위칭부(50)로 구성된다.As shown in FIG. 2, the voice conversion circuit of the multifunctional surround system using the operational amplifier according to the present invention comprises a set of resistors R1, R2, R5, R6, R10, and R11, and the left and right voice signals. Resistance stage 40 for outputting the audio signal input from the output stage (L, R), the low-pass filter unit 10, the resistance stage for filtering out the low-frequency components of the audio signal output from the resistance stage 40 40, a low frequency and high frequency filter unit 20 for synthesizing the low frequency components and the high frequency components of the audio signal output from the buffer unit 30 for outputting the synthesized signals of the left and right audio signals to have an equal gain, The switching unit 50 selects and outputs a plurality of surround signals input through the input terminals S1, S2, and S3 by the input control signals C1 and C2.

부연 설명하자면 다음과 같다.In detail, it is as follows.

상기 저역 필터부(10)는 제3저항(R3), 제1콘덴서(C1)로 이루어진 제1저역필터(11)와, 제4저항(R4), 제2콘덴서(C2)로 이루어진 제2저역필터(12)와, 연산증폭기 (A)로 구성되어, 상기 저항단(40)으로부터 출력된 음성신호의 저주파 성분만을 여파하여 출력시킨다.The low pass filter 10 includes a first low pass filter 11 including a third resistor R3 and a first capacitor C1, and a second low pass including a fourth resistor R4 and a second capacitor C2. It consists of a filter 12 and an operational amplifier A, and filters out only the low frequency components of the audio signal output from the resistance stage 40.

상기 저역, 고역 필터부(20)는 제7, 제9저항(R7, R9), 제3콘덴서(C3)로 이루어진 고역필터(21)와, 제8저항(R8), 제4콘덴서(C4)로 이루어진 저역필터(22)와, 연산증폭기(B)로 구성되어, 입력된 음의 입체감을 줄수 있도록 상기 저항단(40)으로부터 출력된 음성신호의 저주파 성분과 고주파 성분을 합성하여 출력한다.The low pass and high pass filter 20 includes a high pass filter 21 including seventh and ninth resistors R7 and R9 and a third capacitor C3, an eighth resistor R8, and a fourth capacitor C4. It consists of a low pass filter 22 and the operational amplifier (B), and synthesizes and outputs the low-frequency components and high-frequency components of the audio signal output from the resistor stage 40 to give a three-dimensional impression of the input sound.

상기 버퍼부(30)는 좌, 우 음성신호의 합성신호가 동등한 이득을 가질 수 있도록 제12, 제13저항(R12, R13)과 연산증폭기(C)로 구성된다.The buffer unit 30 includes the twelfth and thirteenth resistors R12 and R13 and the operational amplifier C so that the combined signal of the left and right voice signals can have an equal gain.

위와 같은 구성을 가진 본 발명의 동작 및 효과를 상세히 설명하면 다음과 같다.Referring to the operation and effects of the present invention having the above configuration in detail as follows.

음성신호 출력단(L, R)으로부터 출력된 음성신호는 저항단(40)을 거쳐 저역 필터부(10), 저역, 고역 필터부(20), 버퍼부(30)로 이루어진 음성변환회로(100)로 입력된다.The voice signal output from the voice signal output terminals L and R passes through the resistor stage 40 and includes a low pass filter unit 10, a low pass filter, a high pass filter unit 20, and a buffer unit 30. Is entered.

위의 저항단(40)의 제1, 제2저항(R1, R2)을 거쳐 좌, 우 음성신호가 합성되어, 제3저항(R3)과 제1콘덴서(C1)로 구성된 제1저역필터(11)를 거쳐 1차 필터링되어 연산증폭기(A)의 반전(-)단자에 입력되고, 제4저항(R4)과 제2콘덴서(C2)로 구성된 제2저역필터(12)를 거쳐 2차 필터링된 음성신호가 연산증폭기(A)의 비반전(+)단자에 입력됨으로써, 연산증폭기(A)의 출력단자로부터는 1Khz 이하의 저주파 성분으로 저음이 강조된 신호가 출력되어, 스위칭부(50)의 입력단자(S1)로 입력된다.A first low pass filter composed of a third resistor R3 and a first capacitor C1 is synthesized by combining left and right voice signals through the first and second resistors R1 and R2 of the resistor stage 40. 11) is first filtered and input to the inverting (-) terminal of the operational amplifier A, and secondly filtered through a second low pass filter 12 composed of a fourth resistor R4 and a second capacitor C2. When the sound signal is input to the non-inverting (+) terminal of the operational amplifier A, a signal in which bass is emphasized with a low frequency component of 1 kHz or less is output from the output terminal of the operational amplifier A, and the switching unit 50 It is input to the input terminal S1.

그리고, 위의 저항단(40)의 제5, 제6저항(R5, R6)을 거쳐 좌, 우 음성신호가 합성된 다음, 상기 합성신호가 제8저항(R8)과 제4콘덴서(C4)로 구성된 저역필터(22)를 거쳐 연산증폭기(B)의 비반전(+)단자에 입력되고, 또한, 제7, 제9저항(R7, R9)과 제3콘덴서(C3)로 구성된 고역필터(21)를 거쳐 위의 연산증폭기(B)의 반전(-)단자에 입력됨으로써, 연산증폭기(B)의 출력단자에는 저역과 고역으로 동시에 증폭되어 재차 합성되어진 음성신호가 출력되어 스위칭부(50)의 입력단자(S2)로 입력된다.Then, the left and right voice signals are synthesized through the fifth and sixth resistors R5 and R6 of the resistor stage 40, and then the synthesized signals are the eighth resistor R8 and the fourth capacitor C4. A high pass filter comprising a seventh and ninth resistors R7 and R9 and a third capacitor C3, which is input to the non-inverting (+) terminal of the operational amplifier B via a low pass filter 22 composed of 21 is input to the inverting terminal (-) of the operational amplifier (B), the output signal of the operational amplifier (B) is amplified in the low and high frequencies at the same time, the synthesized audio signal is output again and the switching unit 50 Is input to the input terminal S2.

또한, 위의 저항단(40)의 제10, 제11저항(R10, R11)을 거쳐 좌,우 음성신호가 합성된 다음, 제12, 제13저항(R12, R13)과 연산증폭기(C)로 구성된 버퍼부(30)로 입력되어, 충실한 음이 재현될 수 있도록, 이득은 동일하게, 그리고 위상은 역전되어 있으면서, 평활된 주파수 특성을 갖는 음성신호가 스위칭부(50)의 입력단자(S3)로 입력된다.In addition, the left and right voice signals are synthesized through the tenth and eleventh resistors R10 and R11 of the resistor stage 40, and then the twelfth and thirteenth resistors R12 and R13 and the operational amplifier C are combined. The input signal S3 of the switching unit 50 is inputted to the buffer unit 30, so that the sound is equally gained and the phase is reversed so that a faithful sound can be reproduced. ) Is entered.

위의 스위칭부(50)의 입력단자를(S1, S2, S3)로 입력된 각 음성신호들은 마이콤으로부터 입력되는 제어신호(C1, C2)에 의해 선택되어 시간 지연용 딜레이회로(60)를 거쳐서 스피커(미도시)로 출력된다.The voice signals inputted to the input terminals S1, S2 and S3 of the switching unit 50 are selected by the control signals C1 and C2 input from the microcomputer and passed through a delay circuit 60 for time delay. It is output to a speaker (not shown).

위와 같이 작동하는 본 발명은 종래의 음성신호의 합성과 차에 의한 음검출신호가 아닌 저역 필터부, 저역, 고역 필터부, 버퍼부로 이루어진 음성변환회로와 스위칭부를 삽입함으로써, 소비자의 취향에 의해 평활된 주파수특성을 갖고, 저음의 강조 및 음의 입체감이 충실히 재현될 수 있는 다양한 음질과 음성을 선택할 수 있는 효과가 있다.The present invention operates as described above, by inserting a voice conversion circuit and a switching unit consisting of a low pass filter unit, a low pass, a high pass filter unit, and a buffer unit, rather than a sound detection signal due to synthesis and difference of a conventional voice signal, and smoothed by the taste of the consumer. It has the effect of selecting the various sound quality and voice that can have faithfully reproduced frequency characteristics, faithfully reproduce the bass and stereoscopic feeling of the sound.

Claims (4)

일단의 저항들(R1, R2, R5, R6, R10, R11)로 이루어져, 좌, 우 음성신호 출력단(L, R)으로부터 입력되는 음성신호를 출력하는 저항단(40), 상기 저항단(40)으로부터 출력된 음성신호의 저주파 성분을 여파하여 출력시키는 저역필터수단(10), 상기 저항단(40)으로부터 출력된 음성신호의 저주파 성분과 고주파 성분을 합성하여 출력하는 저역, 고역 필터수단(20), 좌, 우 음성신호의 합성신호가 동등한 이득을 가지도록 하여 출력하는 버퍼수단(30), 입력되는 제어신호(C1, C2)에 의해 입력단자들(S1, S2, S3)을 통해 입력된 다수개의 서라운드신호를 선택하여 출력하는 스위칭수단(50)으로 구성된 연산증폭기를 사용한 다기능 서라운드 시스템의 음성변환회로.The resistor stage 40, which consists of a series of resistors R1, R2, R5, R6, R10, and R11, outputs a voice signal input from the left and right voice signal output terminals L and R, and the resistor stage 40 Low-pass filter means 10 for filtering and outputting low-frequency components of the audio signal output from the low-frequency filter, and low-pass and high-pass filter means 20 for synthesizing the low-frequency components and the high-frequency components of the audio signal output from the resistance stage 40. ), Buffer means 30 for outputting the synthesized signal of the left and right voice signals with equal gain, and inputted through the input terminals S1, S2 and S3 by the input control signals C1 and C2. Voice conversion circuit of a multifunctional surround system using an operational amplifier composed of switching means (50) for selecting and outputting a plurality of surround signals. 제1항에 있어서, 상기 저역 필터수단(10)은 제3저항(R3), 제1콘덴서(C1)로 이루어진 제1저역필터(11)와, 제4저항(R4), 제2콘덴서(C2)로 이루어진 제2저역필터 (12)와, 연산증폭기(A)로 구성된 것을 특징으로 하는 연산증폭기를 사용한 다기능 서라운드 시스템의 음성변환회로.The filter of claim 1, wherein the low pass filter means (10) comprises a first low pass filter (11) consisting of a third resistor (R3) and a first capacitor (C1), a fourth resistor (R4), and a second capacitor (C2). And a second low pass filter (12) comprising an operational amplifier (A) and a voice conversion circuit of the multifunctional surround system using the operational amplifier. 제1항에 있어서, 상기 저역, 고역 필터수단(20)을 제7, 제9저항(R7, R9), 제3콘덴서(C3)로 이루어진 고역필터(21)와, 제8저항(R8), 제4콘덴서(C4)로 이루어진 저역필터(22)와, 연산증폭기(B)로 구성된 것을 특징으로 하는 연산증폭기를 사용한 다기능 서라운드 시스템의 음성변환회로.The high-pass filter 21 of claim 1, wherein the low-pass and high-pass filter means 20 comprises seventh, ninth resistors R7 and R9, and a third capacitor C3, an eighth resistor R8, A low-pass filter (22) consisting of a fourth capacitor (C4) and an operational amplifier (B), characterized in that the voice conversion circuit of the multifunctional surround system using an operational amplifier. 제1항에 있어서, 상기 버퍼수단(30)은 제12, 제13저항(R1, R13)과 연산증폭기(C)로 구성된 것을 특징으로 하는 연산증폭기를 사용한 다기능 서라운드 시스템의 음성변환회로.2. The voice conversion circuit of claim 1, wherein the buffer means (30) comprises twelfth and thirteenth resistors (R1, R13) and an operational amplifier (C).
KR1019920020494A 1992-11-03 1992-11-03 A circuit for converting sound of a surround system KR970003040B1 (en)

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KR1019920020494A KR970003040B1 (en) 1992-11-03 1992-11-03 A circuit for converting sound of a surround system

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KR970003040B1 true KR970003040B1 (en) 1997-03-13

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