KR940008497A - Graphic equalizer - Google Patents

Graphic equalizer Download PDF

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Publication number
KR940008497A
KR940008497A KR1019920017279A KR920017279A KR940008497A KR 940008497 A KR940008497 A KR 940008497A KR 1019920017279 A KR1019920017279 A KR 1019920017279A KR 920017279 A KR920017279 A KR 920017279A KR 940008497 A KR940008497 A KR 940008497A
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KR
South Korea
Prior art keywords
data
masking
masking level
absolute
level
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
KR1019920017279A
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Korean (ko)
Inventor
이한상
Original Assignee
이헌조
주식회사 금성사
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Priority to KR1019920017279A priority Critical patent/KR940008497A/en
Publication of KR940008497A publication Critical patent/KR940008497A/en
Withdrawn legal-status Critical Current

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Abstract

본 발명은 그래픽 이퀄라이저에 관한 것으로, 종래에는 필터링과 필터이득만으로 이퀄라이저 기능을 수행하여 이퀄라이저의 기능과 청감상의 불일치로 인해 제품의 신뢰성 및 성능을 저하시키는 문제점이 있었다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic equalizer. In the related art, there is a problem of deteriorating reliability and performance of a product due to an inconsistency between the equalizer function and hearing by performing an equalizer function only by filtering and filter gain.

본 발명은 상기와 같은 종래의 감안하여 직교변환으로 주파수에 대응하는 계수값으로 마스킹레벨을 계산한 후 이 마스킹레벨과 절대 마스킹롬에 저장된 절대 마스킹레벨의 차이를 계산하여 청감상 실제의 주파수레벨로 이퀄라이징 수행하여 변환계수가 주파수성분으로 나타나 제품의 신뢰성 및 선능을 향상하는 효과가 있다.The present invention calculates the masking level with the coefficient value corresponding to the frequency by the orthogonal transformation in consideration of the conventional art as described above, and then calculates the difference between the masking level and the absolute masking level stored in the absolute masking ROM to the actual auditory frequency level. By performing equalization, the conversion coefficient appears as a frequency component, which improves the reliability and performance of the product.

Description

그래픽 이퀄라이저Graphic equalizer

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

제2도는 본 발명의 그래픽 이퀄라이저 구성도.2 is a schematic diagram of a graphic equalizer of the present invention.

제3도의 (가) 내지 (다)는 제2도의 부분별 동작 파형도.(A) to (c) of FIG. 3 are operation waveform diagrams for each part of FIG.

Claims (1)

디지탈 오디오 데이타(DA)를 인가받고 직교변환하는 직교변환부(11)와, 그 직교변환부(11)의 출력을 인가 받아 마스킹레벨을 연산하는 마스킹레벨 연산부(12)와, 절대 마스킹레벨을 저장하는 절대 마스킹롬(13)과, 상기 마스킹레벨 연산부(12)의 데이타와 절대 마스킹룸(13)의 데이타 차를 구하는 감산기(14)와, 외부 이퀄라이저의 데이타에 따라 이득을 제어하는 이득제어부(16)와, 그 이득제어부(16)의 제어에 의해 상기 감산기(14)의 데이타를 증폭하는 증폭기(15)와, 그 증폭기(15)의 출력을 역직교변환시키는 역직교변환부(17)와, 그 역직교변환부(17)의 데이타를 아날로그로 변환하는 디지탈/아날로그 변환기(18)로 구성한 그래픽 이퀄라이저.An orthogonal transform unit 11 for receiving and orthogonally transforming digital audio data DA, a masking level calculator 12 for calculating a masking level by receiving an output of the orthogonal transform unit 11, and an absolute masking level; An absolute masking ROM 13, a subtractor 14 for obtaining a data difference between the data of the masking level calculating unit 12 and the absolute masking room 13, and a gain control unit 16 for controlling gain in accordance with data of an external equalizer. ), An amplifier 15 for amplifying the data of the subtractor 14 under control of the gain control unit 16, an inverse orthogonal transform unit 17 for inversely orthogonally converting the output of the amplifier 15, A graphic equalizer composed of a digital-to-analog converter 18 for converting data of the inverse orthogonal converter 17 into analog. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920017279A 1992-09-22 1992-09-22 Graphic equalizer Withdrawn KR940008497A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920017279A KR940008497A (en) 1992-09-22 1992-09-22 Graphic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920017279A KR940008497A (en) 1992-09-22 1992-09-22 Graphic equalizer

Publications (1)

Publication Number Publication Date
KR940008497A true KR940008497A (en) 1994-04-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920017279A Withdrawn KR940008497A (en) 1992-09-22 1992-09-22 Graphic equalizer

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KR (1) KR940008497A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030068308A (en) * 2002-02-15 2003-08-21 주식회사 엘지이아이 Graphic display apparatus and method for using sound codec

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030068308A (en) * 2002-02-15 2003-08-21 주식회사 엘지이아이 Graphic display apparatus and method for using sound codec

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Legal Events

Date Code Title Description
PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 19920922

PG1501 Laying open of application
PC1203 Withdrawal of no request for examination
WITN Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid