KR940003389B1 - Frequency characteristics improving circuit for cassette tape player header - Google Patents

Frequency characteristics improving circuit for cassette tape player header Download PDF

Info

Publication number
KR940003389B1
KR940003389B1 KR1019920001231A KR920001231A KR940003389B1 KR 940003389 B1 KR940003389 B1 KR 940003389B1 KR 1019920001231 A KR1019920001231 A KR 1019920001231A KR 920001231 A KR920001231 A KR 920001231A KR 940003389 B1 KR940003389 B1 KR 940003389B1
Authority
KR
South Korea
Prior art keywords
signal
filter
frequency
digital
head
Prior art date
Application number
KR1019920001231A
Other languages
Korean (ko)
Other versions
KR930016999A (en
Inventor
최해민
Original Assignee
삼성전자 주식회사
강진구
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
Application filed by 삼성전자 주식회사, 강진구 filed Critical 삼성전자 주식회사
Priority to KR1019920001231A priority Critical patent/KR940003389B1/en
Priority to KR92027099U priority patent/KR950006204Y1/en
Priority to US08/008,664 priority patent/US5342012A/en
Publication of KR930016999A publication Critical patent/KR930016999A/en
Application granted granted Critical
Publication of KR940003389B1 publication Critical patent/KR940003389B1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/24—Chairs or stools with vertically-adjustable seats with vertical spindle

Abstract

The circuit compresses the frequency of audio siganl which is recorded in the magnetic tape and regenerates the audible frequency of 20 KHz. The circuit includes a 1st conversion means (200) which converts analog signal into digital signal, a 1st filter means (50) which compresses the band of digital siganl frequency and filters the digital anti-imaging, a 2nd filter means (60) which extends the original signal frequency and filters the digital anti-imaging, a 2nd conversion means which converts the digital signal into the analog signal. The 1st filter has a decimation filter and the 2nd filter has an interpolation filter.

Description

카세트 테이프 플레이어의 헤드주파수특성 개선회로Head Frequency Characteristic Improvement Circuit of Cassette Tape Player

제1도는 본 발명에 의한 실시예인 카세트 테이프 플레이어의 헤드주파수 특성 개선회로.1 is a circuit for improving head frequency characteristics of a cassette tape player according to an embodiment of the present invention.

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

40 : A/D변환기 50 : 데시메이션필터40: A / D converter 50: decimation filter

60 : 인터폴레이션필터 70 : D/A변환기60: interpolation filter 70: D / A converter

본 발명은 카세트 테이프 플레이어(Cassette tape player)에 있어서 기록 또는 재생헤드의 주파수특성에 관한 것으로, 특히 기록시에는 음향신호의 데이타를 압축하여 좁은 주파수대역에서 음향신호를 기록하고 재생시에는 압축되어 기록된 음향신호데이타를 원래신호로 신장하여 원래신호의 주파수대역을 사용함으로 기록 또는 재생헤드의 주파수특성에 관여하지 않고 가청주파수의 신호를 기록 및 재생할 수 있는 헤드주파수 특성 개선회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the frequency characteristics of a recording or playback head in a cassette tape player. In particular, the recording of an audio signal in a narrow frequency band by compressing the data of the audio signal during recording, The present invention relates to a head frequency characteristic improvement circuit capable of recording and reproducing an audible frequency signal without involving a frequency characteristic of a recording or reproducing head by extending sound signal data into an original signal and using a frequency band of the original signal.

일반적으로 자기테이프를 기록매체로 하여 음향신호를 기록 및 재생하는 전자기기를 카세트 테이프 플레이어라 한다.In general, an electronic apparatus for recording and reproducing an acoustic signal using a magnetic tape as a recording medium is called a cassette tape player.

카세트 테이프 플레이어는 자기테이프에 음향신호를 기록하거나 또는 자기테이프에 기록되어 있는 음향신호를 재생하는 수단으로 헤드가 있다.A cassette tape player has a head as a means for recording sound signals on magnetic tape or reproducing sound signals recorded on magnetic tape.

종래는 자기테이프에 음향신호를 기록 또는 재생하는 헤드는 헤드의 주파수특성에 따라 차단주파수(cut off frquency)가 6.3kHz, 8kHz, 10kHz, 12.5kHz, 14kHz 등이 있는데 테이프에 기록 또는 재생되는 음향신호의 주파수응답은 헤드의 주파수특성에 따라 결정된다.Conventionally, a head for recording or reproducing an acoustic signal on a magnetic tape has a cut off frequency of 6.3 kHz, 8 kHz, 10 kHz, 12.5 kHz, 14 kHz, etc., depending on the frequency characteristics of the head. The frequency response of is determined by the frequency characteristic of the head.

즉, 헤드의 주파수특성에 따라서 헤드의 차단주파수 이상의 주파수성분을 테이프에 기록 또는 재생할 수가 없게 된다.That is, frequency components above the cutoff frequency of the head cannot be recorded or reproduced on the tape according to the frequency characteristics of the head.

한편, 인간이 가청할 수 있는 음향신호의 가청주파수대역은 일반적으로 20Hz~20kHz이다. 헤드의 주파수특성의 10kHz의 차단주파수 특성을 가진 헤드는 10kHz 이상의 주파수를 가진 가청주파수의 신호를 테이프에 기록할 수 없게 되는 문제점이 있다. 또 하나의 문제점은 헤드의 주파수특성이 좋은 것일 수록 가격이 비싸게 되는 것이다.On the other hand, the audible frequency band of the human audible sound signal is generally 20Hz-20kHz. The head having a cutoff frequency characteristic of 10 kHz of the frequency characteristic of the head has a problem that it is not possible to record audible frequency signals having a frequency of 10 kHz or more on a tape. Another problem is that the better the frequency characteristics of the head, the higher the price.

따라서, 본 발명의 목적은 자기테이프상에 기록시킬 음향신호의 주파수대역을 압축하여 기록한 후 재생시에는 테이프상에 압축되어 기록되어 있는 음향신호의 주파수대역을 원신호의 주파수대역으로 확장하여 기록 및 재생 헤드주파수특성에 관여하지 않고 가청주파수인 20kHz까지 신호를 기록 및 재생하는 카세트 테이프 헤드주파수특성 개선회로를 제공하는데 있다.Accordingly, an object of the present invention is to record and reproduce by compressing and recording a frequency band of an acoustic signal to be recorded on a magnetic tape and then reproducing the frequency band of an acoustic signal that is compressed and recorded on a tape during reproduction. A cassette tape head frequency characteristic improvement circuit for recording and reproducing signals up to 20 kHz, which is an audible frequency, without being involved in head frequency characteristics is provided.

상기 목적을 달성하기 위하여 본 발명은 카세트 테이프 플레이어에 있어서 기록시에는 음향신호를 발생하는 소스(source)회로로부터 출력되는 아날로그신호를 디지탈신호로 변환하고 재생시에는 주파수대역이 압축되어 테이프에 기록되어 있는 음향신호를 재생회로를 통해 재생된 아날로그신호를 디지탈신호로 변환하는 제1변환수단과, 기록시에는 상기 제1변환수단에서 출력되는 디지탈신호의 주파수대역을 압축시키고 디지탈-앤티-이미징(anti-imaging)을 필터링하는 제1필터수단과, 재생시에는 상기 제1변환수단에서 출력되는 디지탈신호의 주파수대역을 원래 신호의 주파수대역으로 확장시키고 디지탈-앤티-이미징(anti-imaging)을 필터링하는 제2필터수단과, 기록시에는 상기 제1필터수단에서 출력되는 디지탈신호를 재생시에는 상기 제2필터수단에서 출력되는 디지탈신호를 아날로그신호로 변환하는 제2변환수단을 포함함을 특징으로 한다.In order to achieve the above object, in the cassette tape player, the present invention converts an analog signal output from a source circuit that generates an audio signal at the time of recording into a digital signal, and at the time of reproduction, the frequency band is compressed and recorded on the tape. First converting means for converting the analog signal reproduced through the reproducing circuit into a digital signal, and during recording, compressing the frequency band of the digital signal output from the first converting means and performing digital-anti-imaging (anti- a first filter means for filtering imaging, and a second filter for extending the frequency band of the digital signal output from the first converting means to the frequency band of the original signal and filtering the digital anti-imaging during reproduction. Filter means and the second filter means for reproducing the digital signal output from the first filter means for recording. A digital signal output characterized in that it comprises a second conversion means for converting to an analog signal.

이하 본 발명을 첨부한 도면을 참조하여 상세히 설명하기로 한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

제1도는 본 발명에 따른 실시예인 카세트 플레이어의 헤드주파수특성 개선회로도이다.1 is a circuit diagram for improving head frequency characteristics of a cassette player according to an embodiment of the present invention.

제1도에 의하면, 자기테이프에 기록할 음향신호를 발생하는 소스(source)회로(10)와 음향신호의 주파수 대역을 압축하여 기록한 테이프에서 헤드를 통하여 음향신호를 재생하는 재생회로(20)가 있고 소스회로(10)의 출력단과 재생회로(20)의 출력단을 기록시에는 소스회로(10) 출력단에 재생시에는 재생회로(20) 출력단에 접속되는 SW1에 접속되어 있고, SW1의 출력단은 제1변환수단에 접속되어 있고, 제1변환수단(200)의 출력단은 SW2에 접속되어 있고, SW2의 출력단은 기록시에는 제1필터수단(50)에 접속되고 재생시에는 제2필터수단(60)에 접속되고, 제1필터 출력단과 제2필터 출력단은 기록시에는 제1필터 출력단이 SW3에 접속되고 재생시에는 제2필터 출력단이 SW3에 접속된다.Referring to FIG. 1, a source circuit 10 for generating an acoustic signal to be recorded on magnetic tape and a reproducing circuit 20 for reproducing an acoustic signal through a head from a tape recorded by compressing a frequency band of the acoustic signal are provided. When the output terminal of the source circuit 10 and the output terminal of the reproducing circuit 20 are recorded, the output terminal of the source circuit 10 is connected to SW1 connected to the output terminal of the reproducing circuit 20 when reproducing. Connected to the conversion means, the output end of the first conversion means 200 is connected to SW2, the output end of SW2 is connected to the first filter means 50 at the time of recording, and to the second filter means 60 at the time of reproduction. The first filter output end and the second filter output end are connected to the first filter output end to SW3 during recording and the second filter output end to SW3 during reproduction.

SW3의 출력은 D/A변환기(70)에 접속되고, D/A변환기(70)의 출력단은 LPF(Low Pass Filter)(80)에 접속되고 LPF 출력단은 SW4에 접속된다. SW4 출력단은 기록시에는 기록회로(90)에 접속되고, 재생시에는 AMP(100)에 접속된다. 기록회로(90)의 출력단은 테이프(110)에 접속되고 AMP 출력단은 스피커(120)에 접속되어 있다.The output of SW3 is connected to the D / A converter 70, the output terminal of the D / A converter 70 is connected to a low pass filter (LPF) 80, and the LPF output terminal is connected to SW4. The SW4 output terminal is connected to the recording circuit 90 at the time of recording and to the AMP 100 at the time of reproduction. The output end of the recording circuit 90 is connected to the tape 110 and the AMP output end is connected to the speaker 120.

상기 제1변환수단은 SW1에서 출력되는 아날로그신호를 표본화하여 유지하는 샘플(sample)-홀드(hold)회로(30)와, 샘플(sample)-홀드(hold)회로의 출력신호를 디지탈신호로 변환하는 A/D변환기(40)로 구성된다.The first converting means converts a sample-hold circuit 30 for sampling and holding an analog signal output from SW1 and an output signal of a sample-hold circuit into a digital signal. A / D converter 40 is configured.

그러면 제1도를 통하여 본 발명의 작동을 상세히 설명하기로 한다.Next, the operation of the present invention will be described in detail with reference to FIG. 1.

우선, 음향신호를 테이프에 기록할 경우 SW1은 튜너(Tuner), 측음기(Phonograph), 콤팩트디스크 플레이어(Compact Disk Player)등과 같은 음향신호를 발생하는 소스회로(10)에 접속된다. 음향신호를 발생하는 소스(Source)회로(10)로부터 출력되는 아날로그음향신호 주파수는 가청주파수인 20kHz이다. 가청주파수 20kHz를 가진 아날로그 신호는 샘플(sample)-홀드(hold)(30)를 통하여 아날로그신호가 샘플링된다. 샘플(sample)-홀드(hold)(30)를 통하여 샘플링된 아날로그 음향신호는 A/D변환기(40)를 통하여 디지탈신호로 변환된다. A/D변환기(40)를 통하여 변환된 디지탈신호는 SW2가 데시메이션(Decimation) 필터(Filter)(50)에 접속됨으로 데시메이션필터(50)에 입력된다. 데시메이션필터(50)에 입력된 신호를 디지탈 음향신호는 앤티(anti)-엘리아스(alias)필터와, 샘플레이트 콤프레서(sample rate compressor)로 구성된 데시메이션을 필터를 통하여 음향신호에 있는 데이타를 압축하여 음향신호의 주파수대역 폭을 줄인다. 즉, 소스회로로부터 출력되는 가청주파수 20kHz를 가진 음향신호가 헤드의 주파수특성에 적합한 10kHz로 주파수대역이 줄어들었다. 헤드의 주파수특성에 적합하게 주파수대역이 감소된 음향신호는 SW3에 의해 D/A변환기(70)에 입력된다. D/A변환기에 입력된 신호는 D/A변환기(70)를 통하여 디지탈신호에서 아날로그신호로 변환된다. D/A변환기(70)를 통하여 아날로그신호로 변환된 음향신호는 LPF필터(80)를 통하여 필터링된다. LPF필터를 통하여 필터링된 신호는 SW4에 의해 기록회로(90)에 입력된다. 기록회로에 입력되어 음향신호는 테이프에 기록회로에 있는 헤드를 통하여 기록된다.First, when recording an audio signal on a tape, SW1 is connected to a source circuit 10 that generates an acoustic signal such as a tuner, phonograph, compact disk player, or the like. The analog sound signal frequency output from the source circuit 10 generating the sound signal is 20 kHz, which is an audible frequency. An analog signal having an audible frequency of 20 kHz is sampled through a sample-hold (30). The analog sound signal sampled through the sample-hold 30 is converted into a digital signal through the A / D converter 40. The digital signal converted through the A / D converter 40 is input to the decimation filter 50 because SW2 is connected to the decimation filter 50. The digital audio signal is a signal input to the decimation filter 50, and the decimation composed of an anti-alias filter and a sample rate compressor is used to compress the data in the acoustic signal through the filter. To reduce the frequency band width of the sound signal. That is, the frequency band of the acoustic signal having an audible frequency of 20 kHz output from the source circuit is reduced to 10 kHz that is suitable for the frequency characteristic of the head. The sound signal whose frequency band is reduced to suit the frequency characteristic of the head is input to the D / A converter 70 by SW3. The signal input to the D / A converter is converted into a analog signal from a digital signal through the D / A converter 70. The acoustic signal converted into an analog signal through the D / A converter 70 is filtered through the LPF filter 80. The signal filtered through the LPF filter is input to the recording circuit 90 by SW4. A sound signal input to the recording circuit is recorded on the tape through the head in the recording circuit.

한편, 데시메이션(Decimation)필터를 통하여 헤드의 주파수특성에 적합하게 음향신호의 주파수대역을 축소시켜 테이프에 기록된 본래 20kHz의 주파수를 가진 음향신호는 재생할 경우 헤드를 통하여 재생회로(20)에서 테이프에 기록되어 있는 주파수대역이 축소된 음향신호로 재생된다.On the other hand, by reducing the frequency band of the sound signal to fit the frequency characteristics of the head through the decimation filter, the audio signal having a frequency of 20 kHz originally recorded on the tape is reproduced in the tape by the playback circuit 20 through the head. The frequency band recorded at is reproduced as a reduced sound signal.

재생회로(20)에서 출력되는 신호는 SW1에 의해 샘플(sample)-홀드(hold)에 접속된다. 샘플(sample)-홀드(hold)에 입력된 아날로그의 음향신호는 샘플링된다. 샘플(sample)-홀드(hold)(30)를 통하여 샘플링된 아날로그 음향신호는 A/D변환기(40)에 입력된다. A/D변환기에 입력된 신호는 A/D변환기를 통하여 디지탈신호로 변환된다.The signal output from the regeneration circuit 20 is connected to a sample-hold by SW1. The analog sound signal input to the sample-hold is sampled. The analog sound signal sampled through the sample-hold 30 is input to the A / D converter 40. The signal input to the A / D converter is converted into a digital signal through the A / D converter.

A/D변환기(40)를 통하여 변환된 디지탈신호는 SW2가 인터폴레이션(Interpolation)필터(Filter)에 접속됨으로 인터폴레이션 필터에 입력된다. 인터폴레이션필터에 입력된 신호는 디지탈 앤티(anti)-엘리아스(alias)필터와, 샘플 레이트 익스펜더(Sample rate expander)로 구성된 인터폴레이션(Interpolation)필터(Filter)를 통하여 데시메이션(Decimation)필터에 의해 압축되어진 신호의 데이타를 확장하여 데시메이션필터에 의해 압축되기 전 원래신호의 주파수대역으로 확장된다. 즉, 20kHz의 주파수를 가진 음향신호가 헤드의 차단주파수가 10kHz인 헤드의 주파수특성에 적합하도록 음향신호의 주파수대역을 10kHz로 좁혀서 테이프상에 기록되어진 것을 인터폴레이션 필터를 통하여 원래신호의 주파수인 20kHz의 가청주파수인 음향신호로 확장된다. 인터폴레이션을 통하여 출력되는 20kHz의 음향신호로 확장된 신호는 SW3에 의해 D/A변환기에 입력된다.The digital signal converted through the A / D converter 40 is input to the interpolation filter because SW2 is connected to an interpolation filter. The signal input to the interpolation filter is compressed by the decimation filter through an interpolation filter composed of a digital anti-alias filter and a sample rate expander. The data of the signal is extended and extended to the frequency band of the original signal before being compressed by the decimation filter. That is, the audio signal with a frequency of 20 kHz was recorded on the tape by narrowing the frequency band of the sound signal to 10 kHz so as to fit the frequency characteristic of the head with the cutoff frequency of 10 kHz. It is extended to an acoustic signal at an audible frequency. The signal extended to the 20 kHz acoustic signal output through interpolation is input to the D / A converter by SW3.

D/A변환기에 입력된 신호는 D/A변환기(70)를 통하여 디지탈 신호에서 아날로그신호로 변환된다. D/A변환기(70)를 통하여 아날로그 신호로 변환된 음향신호는 LPF필터(80)를 통하여 필터링된다. LPF필터(80)를 통하여 필터링된 신호는 SW4에 의해 AMP(100)에 입력된다. 증폭기에 입력된 음향신호는 스피커를 통하여 가청주파수인 20kHz의 음향신호를 출력한다.The signal input to the D / A converter is converted into a analog signal from a digital signal through the D / A converter 70. The acoustic signal converted into an analog signal through the D / A converter 70 is filtered through the LPF filter 80. The signal filtered through the LPF filter 80 is input to the AMP 100 by SW4. The sound signal input to the amplifier outputs an audio signal of 20 kHz which is an audible frequency through the speaker.

상술한 바와 같이 본 발명은 음향신호를 기록 또는 재생하는 헤드에 있어서 헤드의 차단주파수특성에 관계없이 가청주파수인 20kHz의 음향신호를 테이프에 기록 또는 재생할 수 있는 이점이 있다.As described above, in the head for recording or reproducing an acoustic signal, there is an advantage that an audio signal of 20 kHz, which is an audible frequency, can be recorded or reproduced on a tape regardless of the cutoff frequency characteristic of the head.

Claims (3)

카세트 테이프 플레이어에 있어서, 기록시에는 음향신호를 발생하는 소스회로로부터 출력되는 아날로그신호를 디지탈신호로 변환하고, 재생시에는 주파수대역이 압축되어 테이프에 기록되어 있는 음향신호를 재생회로를 통해 재생된 아날로그신호를 디지탈신호로 변환하는 제1변환수단(200)과, 기록시에는 상기 제1변환수단(200)에서 출력되는 디지탈신호의 주파수대역을 압축시키고 디지탈 앤티-이미징을 필터링하는 제1필터수단(50)과, 재생시에는 상기 제1변환수단(200)에서 출력되는 디지탈신호의 주파수대역을 원래 신호의 주파수대역으로 확장시키고 디지탈 앤티-이미징을 필터링하는 제2필터수단(60)과, 기록시에는 상기 제1필터수단(50)에서 출력되는 디지탈신호를 재생시에는 상기 제2필터수단(60)에서 출력되는 디지탈신호를 아날로그신호로 변환하는 제2변환수단(70)을 포함함을 특징으로 하는 헤드주파수특성 개선회로.In a cassette tape player, an analog signal output from a source circuit generating an audio signal is converted into a digital signal during recording, and an audio signal reproduced through a playback circuit is reproduced through a playback circuit in which the frequency band is compressed and the audio signal is recorded on the tape during playback. First conversion means 200 for converting a signal into a digital signal, and first filter means for compressing a frequency band of the digital signal output from the first conversion means 200 and filtering digital anti-imaging during recording. 50) a second filter means 60 for extending the frequency band of the digital signal output from the first converting means 200 to the frequency band of the original signal at the time of reproduction and filtering the digital anti-imaging; When reproducing the digital signal output from the first filter means 50, the digital signal output from the second filter means 60 is converted into an analog signal. A second frequency characteristic conversion head gaeseonhoe, characterized in that it comprises a means (70) for. 제1항에 있어서, 제1필터수단은 데시메이션필터로 구성됨을 특징으로 하는 헤드주파수특성 개선회로.2. The head frequency characteristic improvement circuit according to claim 1, wherein the first filter means comprises a decimation filter. 제1항에 있어서, 제2필터수단은 인터폴레이션필터로 구성됨을 특징으로 하는 헤드주파수특성 개선회로.2. The head frequency characteristic improvement circuit according to claim 1, wherein the second filter means comprises an interpolation filter.
KR1019920001231A 1992-01-28 1992-01-28 Frequency characteristics improving circuit for cassette tape player header KR940003389B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1019920001231A KR940003389B1 (en) 1992-01-28 1992-01-28 Frequency characteristics improving circuit for cassette tape player header
KR92027099U KR950006204Y1 (en) 1992-01-28 1992-12-29 Height adjusting device in swivel chair
US08/008,664 US5342012A (en) 1992-01-28 1993-01-25 Height adjusting mechanism for swivel chair

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920001231A KR940003389B1 (en) 1992-01-28 1992-01-28 Frequency characteristics improving circuit for cassette tape player header

Publications (2)

Publication Number Publication Date
KR930016999A KR930016999A (en) 1993-08-30
KR940003389B1 true KR940003389B1 (en) 1994-04-21

Family

ID=19328401

Family Applications (2)

Application Number Title Priority Date Filing Date
KR1019920001231A KR940003389B1 (en) 1992-01-28 1992-01-28 Frequency characteristics improving circuit for cassette tape player header
KR92027099U KR950006204Y1 (en) 1992-01-28 1992-12-29 Height adjusting device in swivel chair

Family Applications After (1)

Application Number Title Priority Date Filing Date
KR92027099U KR950006204Y1 (en) 1992-01-28 1992-12-29 Height adjusting device in swivel chair

Country Status (1)

Country Link
KR (2) KR940003389B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442536B1 (en) * 2001-08-28 2004-08-04 이종환 Operation levers mounting structure of swivel chair
KR100890156B1 (en) * 2008-10-08 2009-03-20 김문구 Jack support repair device
KR101601507B1 (en) * 2014-10-17 2016-03-08 현대자동차주식회사 Seat for vehicle
KR102006076B1 (en) * 2017-11-28 2019-07-31 곽범용 Leveler capable of easily setting

Also Published As

Publication number Publication date
KR930017656U (en) 1993-08-20
KR950006204Y1 (en) 1995-08-04

Similar Documents

Publication Publication Date Title
JP3327114B2 (en) Signal processing device, signal recording device, and signal reproducing device
JPH04245062A (en) Device for reproducing pcm digital audio signal
JPH0738120B2 (en) Audio recording / playback device
KR940003389B1 (en) Frequency characteristics improving circuit for cassette tape player header
KR100372904B1 (en) Signal processor
JP3327116B2 (en) Signal processing device, signal recording device, and signal reproducing device
JP2000182331A (en) Reproducing device of digital signal and processor thereof
US5719574A (en) Digital audio transmission apparatus
KR930016999A (en) Head Frequency Characteristic Improvement Circuit of Cassette Tape Player
JP2698579B2 (en) Audio signal time base converter
JP3233295B2 (en) PCM data compression and decompression method
JPS60165831A (en) Pcm system reproducing device
JPS60263198A (en) Acoustic equipment with ic memory
KR100203242B1 (en) Device for the frequency compensation of a magnetic recording/reproducing equipment
KR100195084B1 (en) Method for recording/reproducing digital audio signal and the device therefor
JPS6032167A (en) Digital audio sound recorder
JPH097298A (en) Information signal recording device and information signal reproducing device
JPH03224189A (en) Tape recorder
KR100205434B1 (en) Audio signal processing device
SU773693A1 (en) Magnetic record reproducing device
JPH05274793A (en) Recording and reproducing system for digital tape player
JPS62134860A (en) Recording and reproducing method
JPS63102070A (en) Sound recorder
JPH0923137A (en) Signal processor
JPS613364A (en) Noise diminishing device

Legal Events

Date Code Title Description
A201 Request for examination
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 19980327

Year of fee payment: 5

LAPS Lapse due to unpaid annual fee