KR0126617B1 - Voice recording apparatus - Google Patents

Voice recording apparatus

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Publication number
KR0126617B1
KR0126617B1 KR1019940020404A KR19940020404A KR0126617B1 KR 0126617 B1 KR0126617 B1 KR 0126617B1 KR 1019940020404 A KR1019940020404 A KR 1019940020404A KR 19940020404 A KR19940020404 A KR 19940020404A KR 0126617 B1 KR0126617 B1 KR 0126617B1
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KR
South Korea
Prior art keywords
signal
pass filter
voice
high pass
digital signal
Prior art date
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KR1019940020404A
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Korean (ko)
Inventor
박희봉
주남식
Original Assignee
이헌조
엘지전자주식회사
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Application filed by 이헌조, 엘지전자주식회사 filed Critical 이헌조
Priority to KR1019940020404A priority Critical patent/KR0126617B1/en
Application granted granted Critical
Publication of KR0126617B1 publication Critical patent/KR0126617B1/en

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Abstract

An apparatus for recording a voice signal is disclosed. The apparatus comprises a mike(1); an inverse amplifier(2) for amplifying the voice signal from the mike(1); a low pass filter(3) for filtering the noise of the voice signal; a high pass filter(4) for passing the high frequency of the voice signal; a level director(7) for directing the level of the output signal from the high pass filter(4); a microcomputer(8) for controlling a digital signal processor(6) in response to the output signal from the level director(7); an analog/digital converter(5) for converting the voice signal from the high pass filter(4) to a digital voice signal; the digital signal processor(6), responsive to the control signal from the microcomputer(8), for processing the output signal from the analog/digital converter(5) to compress the voice signal data; and a memory(9) for storing the voice signal data processed at the digital signal processor(6).

Description

음성녹음장치Voice recording device

제1도는 종래 음성녹음장치의 구성블럭도.1 is a block diagram of a conventional voice recording apparatus.

제2도는 본 발명 음성녹음장치의 구성블럭도.2 is a block diagram of a voice recording apparatus of the present invention.

제3도는 본 발명 음성녹음장치의 레벨디텍터로 입출력되는 신호의 파형도.3 is a waveform diagram of signals input and output to the level detector of the voice recording device of the present invention.

제4도는 본 발명 음성녹음장치의 저역통과필터와 고역통과필터의 특성을 나타낸 그래프.4 is a graph showing characteristics of the low pass filter and the high pass filter of the present invention.

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

1 : 마이크2 : 반전증폭기1: microphone 2: inverting amplifier

3 : 저역통과필터4 : 고역통과필터3: low pass filter 4: high pass filter

5 : A/D 및 D/A 변환부6 : 디지탈신호처리부5: A / D and D / A converter 6: Digital signal processor

본 발명은 음성녹음장치에 관한 것으로, 특히 음성만을 자동적으로 녹음이 될 수 있도록 한 음성녹음장치에 관한 것이다.The present invention relates to a voice recording apparatus, and more particularly, to a voice recording apparatus capable of automatically recording only voice.

종래 음성녹음장치는 제1도에 도시된 바와 같이 입력되는 음성을 음성신호로 변환시키는 마이크(21)와, 상기 마이크(21)에서 출력된 음성신호를 증폭하는 증폭기(22)와, 상기 증폭기(22)에서 증폭출력된 신호의 일정한 주파수대역 이외의 대역을 감쇠시키는 대역통과필터(23)와, 상기 대역통과필터(23)에서 출력된 신호를 디지탈신호로 변환시키는 A/D 및 D/A 변환부(24)와, 상기 A/D 및 D/A 변환부(24)에서 출력된 디지탈신호를 처리하는 디지탈신호처리부(25)와, 상기 디지탈신호처리부(25)에서 출력된 신호를 저장하는 메모리부(26)로 구성된다.The conventional voice recording apparatus includes a microphone 21 for converting an input voice into a voice signal, an amplifier 22 for amplifying the voice signal output from the microphone 21, and the amplifier as shown in FIG. A band pass filter 23 for attenuating bands other than a constant frequency band of the signal amplified and output in step 22), and A / D and D / A conversion for converting a signal output from the band pass filter 23 into a digital signal. A digital signal processor 25 for processing the digital signal output from the A / D and D / A converter 24, and a memory for storing the signal output from the digital signal processor 25 It consists of a part 26.

이와 같이 구성된 종래 음성녹음장치는 사용자가 녹음장치를 동작시켜 녹음을 하려고 할 때 마이크(21)로 음성이 입력되고, 상기 마이크(21)에 입력된 음성신호는 증폭기(22)에서 증폭되어 출력되며, 상기 증폭기(22)에서 증폭된 음성신호는 대역통과필터(23)를 거쳐 A/D 및 D/A 변환부(24)에서 디지탈신호를 변환되고, 상기 A/D 및 D/A 변환부(24)에서 변환된 디지탈신호는 디지탈신호처리부(25)에서 처리되어 메모리부(26)에 저장되어 녹음된다.In the conventional voice recording device configured as described above, when a user attempts to record by operating a recording device, voice is input to the microphone 21, and the voice signal input to the microphone 21 is amplified by the amplifier 22 and output. The audio signal amplified by the amplifier 22 is converted into a digital signal by the A / D and D / A converter 24 through a band pass filter 23, and the A / D and D / A converter ( The digital signal converted in 24 is processed by the digital signal processing unit 25, stored in the memory unit 26, and recorded.

그러나 종래 음성녹음장치는 녹음장치를 동작시키면 소리의 유, 무에 관계없이 계속적으로 녹음되며 따라서, 음성만이 녹음되는 것이 아니라 외부의 잡음 및 순간적인 펄스 등도 녹음이 되는 문제점이 있었다.However, the conventional voice recording apparatus continuously records regardless of the presence or absence of sound when the recording apparatus is operated. Therefore, not only the voice is recorded but also the external noise and the instantaneous pulse are recorded.

본 발명은 이와 같은 종래의 문제점을 해결하기 위하여 음성이 있을 때만 녹음장치가 동작되어 녹음이 가능하도록 하고, 음성이 없을 시에는 녹음장치가 오프되도록 하여 음성데이타를 저장하는 디스크의 양을 줄일 수 있고, 외부의 잡음 등도 녹음되지 않도록 한 것으로 첨부된 도면에 의하여 그 구성 및 작용효과를 설명하면 다음과 같다.The present invention can reduce the amount of the disk to store the voice data by allowing the recording device is operated only when there is a voice in order to solve such a conventional problem, the recording device is enabled, and the recording device is turned off when there is no voice. When the external noise, etc. are not recorded, the configuration and operation effects will be described with reference to the accompanying drawings.

본 발명 음성녹음장치의 구성은 제2도에 도시된 바와 같이 입력되는 음성을 음성신호로 변환시키는 마이크(1)와, 상기 마이크(1)에서 출력된 음성신호를 증폭출력하는 반전증폭기(2)와, 상기 반전증폭기(2)에서 증폭출력된 음성신호 주파수의 고역부분을 제거하여 외부잡음 등을 제거하는 저역통과필터(3)와, 상기 저역통과필터(3)에서 출력된 음성신호 주파수의 고역부분만을 통과시키는 고역통과필터(4)와, 상기 고역통과필터(4)에서 출력된 신호의 라벨을 디텍트(Detect)하는 레벨디텍터(7)와, 상기 레벨디텍터(7)로부터 신호를 입력받아 디지탈신호처리부(6)를 제어하는 마이컴(8)과, 상기 고역통과필터(4)에서 출력된 음성신호를 디지탈신호로 변환시키는 A/D 및 D/A 변환부(5)와, 상기 A/D 및 D/A 변환부(5)에서 출력된 신호를 마이컴(8)의 제어를 받아 디지탈신호처리하여 음성신호데이타를 압축하는 디지탈신호처리부(6)와, 상기 디지탈신호처리부(6)에서 압축된 음성신호 데이타를 저장하는 메모리부(9)로 구성된다.The configuration of the voice recording apparatus of the present invention includes a microphone 1 for converting an input voice into a voice signal, and an inverting amplifier 2 for amplifying and outputting the voice signal output from the microphone 1, as shown in FIG. And a low pass filter 3 for removing external noise and the like by removing a high frequency portion of the voice signal frequency amplified and output from the inverting amplifier 2, and a high frequency range of the voice signal frequency output from the low pass filter 3; A high pass filter 4 for passing only a portion, a level detector 7 for detecting a label of a signal output from the high pass filter 4, and a signal from the level detector 7 A microcomputer 8 for controlling the digital signal processor 6, an A / D and D / A converter 5 for converting a voice signal output from the high pass filter 4 into a digital signal, and the A / Digital signal under control of the microcomputer 8 by the signal output from the D and D / A converter 5 And a digital signal processor 6 for processing and compressing the voice signal data, and a memory 9 for storing the voice signal data compressed by the digital signal processor 6.

미설명부호 R1, R2는 저항, C1, C2는 콘덴서, 10은 낫(NOT)게이트, 11은 스피커.Unmarked R1 and R2 are resistors, C1 and C2 are capacitors, 10 is NOT gate and 11 is speaker.

이와 같이 구성된 음성녹음장치는 마이크(1)를 통하여 음성신호가 출력되면, 기준전압(Vref)에 의해 낮은 소리는 삭제시키고, 반전증폭기(2)에서 증폭하여 저역통과필터(3)에 출력하고, 저역통과필터(3)에서는 반전증폭기(2)에서 증폭출력된 음성신호 주파수의 고역부분을 제거하여 잡음 등을 제거하게 되며, 고역통과필터(4)를 거치면 제4도와 같이 순간적이 하이(High) 펄스가 제거된다.In the voice recording device configured as described above, when the voice signal is output through the microphone 1, the low sound is eliminated by the reference voltage Vref, amplified by the inverting amplifier 2, and output to the low pass filter 3, In the low pass filter 3, the high frequency portion of the voice signal frequency amplified and output from the inverting amplifier 2 is removed to remove noise, and the high pass filter 4 passes through the instantaneous high as shown in FIG. The pulse is removed.

이때, 저역통과필터(3)와 고역통과필터(4)를 거치면서 음성주파수만 통과시키기 위하여 음성주파수대역(300Hz∼10kHz)을 결정하게 되며, A/D 및 D/A 변환부(5)에서 디지탈신호로 변환하여 디지탈신호처리부(6)에서 디지탈신호처리하여 메모리부(9)에 저장하게 되는바, 리벨디텍터(7)에서는 고역통과필터(4)에서 출력된 제3도의 (가)와 같은 신호의 레벨을 디텍트하여 제3도의 (나)와 같은 신호를 마이컴(8)으로 출력하므로서, 마이컴(8)에서는 디지탈신호처리부(6)의 동작을 제어하게 되고, 제3도의 (나)와 같은 클럭을 레벨디텍터(7)에 출력하게 된다.At this time, the low frequency filter (300 Hz to 10 kHz) is determined to pass only the voice frequency while passing through the low pass filter (3) and the high pass filter (4), the A / D and D / A converter 5 The digital signal processing unit 6 converts the digital signal into digital signals and stores them in the memory unit 9. The level detector 7 outputs the high pass filter 4 as shown in FIG. By detecting the level of the signal and outputting a signal such as (b) of FIG. 3 to the microcomputer 8, the microcomputer 8 controls the operation of the digital signal processing unit 6, and the (b) of FIG. The same clock is output to the level detector 7.

즉, 레벨디텍터(7)에서 고역통과필터(4)에서 출력된 신호의 레벨을 디텍트하여 신호의 움직임이 있으면 마이컴(8)으로 로우신호를 출력하고, 마이컴(8)이 인식하여 디지탈신호처리부(6)를 동작하게 하여 메모리부(9)에 저장을 실행하고, 레벨디텍터(7)에서 레벨을 디텍트하여 움직임이 없으면 하이신호를 출력하게 되고, 마이컴(8)에서 디지탈신호처리부(6)를 동작하지 못하게 하므로서 메모리부(9)에 저장이 중지된다.That is, the level detector 7 detects the level of the signal output from the high pass filter 4 and outputs a low signal to the microcomputer 8 when there is a signal movement. The digital signal processing unit recognizes the microcomputer 8. (6) is operated to store in the memory unit 9, the level detector 7 detects the level and outputs a high signal if there is no movement, and the microcomputer 8 processes the digital signal processor 6 The operation is stopped in the memory unit 9 by disabling the operation.

이상에서 설명한 바와 같이 저역통과필터(3)와 고역통과필터(4)를 거쳐 외부잡음 등을 제거하고, 저역통과필터와 고역통과필터를 통해 필터링된 신호의 레벨을 디텍트하여 신호의 움직임을 검출하므로서, 음성이 없을 때에는 디지탈신호처리부(6)를 동작하지 않게 하여 녹음을 중단하게 하는 것으로 불필요한 녹음으로 발생되는 메모리부(9)의 용량을 감소시키고, 순수한 음성만이 녹음되는 효과가 있다.As described above, the external noise is removed through the low pass filter 3 and the high pass filter 4, and the motion of the signal is detected by detecting the level of the filtered signal through the low pass filter and the high pass filter. Therefore, when there is no voice, the digital signal processing unit 6 is not operated to stop recording, thereby reducing the capacity of the memory unit 9 generated by unnecessary recording, and only pure voice is recorded.

Claims (2)

입력되는 음성을 음성신호로 변환시키는 마이크(1)와, 상기 마이크(1)에서 출력된 음성신호를 증폭출력하는 반전증폭기(2)와, 상기 반전증폭기(2)에서 증폭출력된 음성신호 주파수의 고역부분을 제거하여 외부잡음 등을 제거하는 저역통과필터(3)와, 상기 저역통과필터(3)에서 출력된 음성신호 주파수의 고역부분만을 통과시키는 고역통과필터(4)와, 상기 고역통과필터(4)에서 출력된 신호의 리벨을 디텍트하는 레벨디텍터(7)와, 상기 레벨디텍터(7)로부터 신호를 입력받아 디지탈신호처리부(6)를 제어하는 마이컴(8)과, 상기 고역통과필터(4)에서 출력된 음성신호를 디지탈신호로 변환시키는 A/D 및 D/A 변환부(5)와, 상기 A/D 및 D/A 변환부(5)에서 출력된 신호를 마이컴(8)의 제어를 받아 디지탈신호처리하여 음성신호데이타를 압축하는 디지탈신호처리부(6)와, 상기 디지탈신호처리부(6)에서 디지탈신호처리된 신호를 저장하는 메모리부(9)로 구성된 것을 특징으로 하는 음성녹음장치.A microphone 1 for converting the input voice into a voice signal, an inverting amplifier 2 for amplifying and outputting the voice signal output from the microphone 1, and a frequency of the voice signal amplified and output from the inverting amplifier 2; A low pass filter (3) for removing external noise by removing a high pass portion, a high pass filter (4) for passing only a high pass portion of an audio signal frequency output from the low pass filter (3), and the high pass filter A level detector 7 for detecting the level of the signal output from (4), a microcomputer 8 for receiving a signal from the level detector 7 and controlling the digital signal processor 6, and the high pass filter. A / D and D / A converting section 5 for converting the audio signal output from (4) into digital signal, and the signal output from the A / D and D / A converting section (5) A digital signal processor 6 for compressing voice signal data by digital signal processing under the control of And a memory unit (9) for storing the digital signal processed signal in the digital signal processor (6). 제1항에 있어서, 저역통과필터와 고역통과필터의 음성주파수대역이 300Hz∼10kHz인 것을 특징으로 하는 음성녹음장치.2. The voice recording apparatus according to claim 1, wherein the voice frequency bands of the low pass filter and the high pass filter are 300 Hz to 10 kHz.
KR1019940020404A 1994-08-18 1994-08-18 Voice recording apparatus KR0126617B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015103253A1 (en) * 2014-01-06 2015-07-09 Gibson Brands, Inc. Selective sound storage device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015103253A1 (en) * 2014-01-06 2015-07-09 Gibson Brands, Inc. Selective sound storage device
US20160336037A1 (en) * 2014-01-06 2016-11-17 Gibson Brands, Inc. Selective sound storage device
US10297283B2 (en) 2014-01-06 2019-05-21 Gibson Brands, Inc. Selective sound storage device

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