JPS56169919A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS56169919A
JPS56169919A JP7456080A JP7456080A JPS56169919A JP S56169919 A JPS56169919 A JP S56169919A JP 7456080 A JP7456080 A JP 7456080A JP 7456080 A JP7456080 A JP 7456080A JP S56169919 A JPS56169919 A JP S56169919A
Authority
JP
Japan
Prior art keywords
data
tap gain
converter
tap
value
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.)
Granted
Application number
JP7456080A
Other languages
Japanese (ja)
Other versions
JPS6322486B2 (en
Inventor
Masaru Sakurai
Kazuo Sasaki
Shinichi Makino
Shunichi Onishi
Masaharu Obara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Japan Broadcasting Corp
Original Assignee
Toshiba Corp
Nippon Hoso Kyokai NHK
Tokyo Shibaura Electric Co Ltd
Japan Broadcasting Corp
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 Toshiba Corp, Nippon Hoso Kyokai NHK, Tokyo Shibaura Electric Co Ltd, Japan Broadcasting Corp filed Critical Toshiba Corp
Priority to JP7456080A priority Critical patent/JPS56169919A/en
Publication of JPS56169919A publication Critical patent/JPS56169919A/en
Publication of JPS6322486B2 publication Critical patent/JPS6322486B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/14—Control of transmission; Equalising characterised by the equalising network used
    • H04B3/142—Control of transmission; Equalising characterised by the equalising network used using echo-equalisers, e.g. transversal

Abstract

PURPOSE:To increase the accuracy of equalization and to reduce the residual distortion, by deciding the relation between the data in a tap gain memory and the prescribed decided value and switching the input and output characteristics of a D/A converter basing on the result. CONSTITUTION:Data in a tap gain memory 10 is gradually corrected every vertical period signal incoming by adding 9 it to the LSB of the data corresponded in a tap gain, and a deciding device 13 compares the absolute value of corrected data for the tap gain with the decided value X to be specified digitally to decide the relation of amplitude. As the result of this decision, if the data of all the tap gain except the main tap corresponding to the main signal is less than the X, it is judged that the maximum value of the required tap gain is less than the X, and the input characteristics of the D/A converter 11 can be switched so that the maximum value of the output of the D/A converter 11 corresponds to the X.
JP7456080A 1980-06-03 1980-06-03 Automatic equalizer Granted JPS56169919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7456080A JPS56169919A (en) 1980-06-03 1980-06-03 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7456080A JPS56169919A (en) 1980-06-03 1980-06-03 Automatic equalizer

Publications (2)

Publication Number Publication Date
JPS56169919A true JPS56169919A (en) 1981-12-26
JPS6322486B2 JPS6322486B2 (en) 1988-05-12

Family

ID=13550726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7456080A Granted JPS56169919A (en) 1980-06-03 1980-06-03 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPS56169919A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60111537A (en) * 1983-10-28 1985-06-18 エタブリシユメント　パブリツク　デ　デイフユージヨン　デイツト↑：テレデイフユージヨン　デ　フランス″ Echo cancelling device in digital transmission
JP2009502097A (en) * 2005-07-19 2009-01-22 トムソン ライセンシング Adaptive equalizer tap step size

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60111537A (en) * 1983-10-28 1985-06-18 エタブリシユメント　パブリツク　デ　デイフユージヨン　デイツト↑：テレデイフユージヨン　デ　フランス″ Echo cancelling device in digital transmission
JP2009502097A (en) * 2005-07-19 2009-01-22 トムソン ライセンシング Adaptive equalizer tap step size

Also Published As

Publication number Publication date
JPS6322486B2 (en) 1988-05-12

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