JPS6427376A - Waveform equalizing circuit - Google Patents

Waveform equalizing circuit

Info

Publication number
JPS6427376A
JPS6427376A JP18402587A JP18402587A JPS6427376A JP S6427376 A JPS6427376 A JP S6427376A JP 18402587 A JP18402587 A JP 18402587A JP 18402587 A JP18402587 A JP 18402587A JP S6427376 A JPS6427376 A JP S6427376A
Authority
JP
Japan
Prior art keywords
channel
section
cpu
waveform
waveform equalization
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
JP18402587A
Other languages
Japanese (ja)
Other versions
JP2605291B2 (en
Inventor
Tomoji Kondo
Yukio Takada
Hiroyasu Shinpo
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62184025A priority Critical patent/JP2605291B2/en
Publication of JPS6427376A publication Critical patent/JPS6427376A/en
Application granted granted Critical
Publication of JP2605291B2 publication Critical patent/JP2605291B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Television Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To contrive to reduce the converging time for waveform equalization by reading a waveform equalizing control data of a channel replaced by a waveform equalizing memory section when a channel is switched and using the said data as an initial value so as to control the waveform equalizing circuit. CONSTITUTION:In receiving a television broadcast by a built-in teletext receiver, a teletext is received in advance through the back channel and a tap coefficient of a transversal filter of a waveform equalization/reproduction data section 2 is obtained by the arithmetic operation of the CPU 1 and a tap coefficient to be obtained and a channel signal are stored in a waveform equalization control data in the waveform equalization memory section 6. In replacing the reception from the television broadcast into the teletext broadcast and switching the channel, a channel number is sent from the television reception section to the CPU 1 of the teletext reception section. When the CPU 1 detects the channel number, the CPU 1 writes the tap coefficient of the channel number obtained from the memory 6 by the operation of the CPU 1 in advance to the waveform equalization/reproduced data section 2. Thus, the section 2 starts waveform equalization control while the tap coefficient suitable for each channel as the initial value for each channel changeover.
JP62184025A 1987-07-23 1987-07-23 Waveform equalization circuit Expired - Lifetime JP2605291B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62184025A JP2605291B2 (en) 1987-07-23 1987-07-23 Waveform equalization circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62184025A JP2605291B2 (en) 1987-07-23 1987-07-23 Waveform equalization circuit

Publications (2)

Publication Number Publication Date
JPS6427376A true JPS6427376A (en) 1989-01-30
JP2605291B2 JP2605291B2 (en) 1997-04-30

Family

ID=16146030

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62184025A Expired - Lifetime JP2605291B2 (en) 1987-07-23 1987-07-23 Waveform equalization circuit

Country Status (1)

Country Link
JP (1) JP2605291B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0654944A1 (en) * 1993-11-18 1995-05-24 Lg Electronics Inc. Channel equalizer for digital television receiver
JP2008301064A (en) * 2007-05-30 2008-12-11 Mitsubishi Electric Corp Sneak canceler circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59171307A (en) * 1983-03-18 1984-09-27 Fujitsu Ltd Tap coefficient switching system
JPS59194580A (en) * 1983-04-19 1984-11-05 Toshiba Corp Automatic waveform equalizer
JPS60124113A (en) * 1983-12-08 1985-07-03 Matsushita Electric Ind Co Ltd Waveform equalizer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59171307A (en) * 1983-03-18 1984-09-27 Fujitsu Ltd Tap coefficient switching system
JPS59194580A (en) * 1983-04-19 1984-11-05 Toshiba Corp Automatic waveform equalizer
JPS60124113A (en) * 1983-12-08 1985-07-03 Matsushita Electric Ind Co Ltd Waveform equalizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0654944A1 (en) * 1993-11-18 1995-05-24 Lg Electronics Inc. Channel equalizer for digital television receiver
JP2008301064A (en) * 2007-05-30 2008-12-11 Mitsubishi Electric Corp Sneak canceler circuit

Also Published As

Publication number Publication date
JP2605291B2 (en) 1997-04-30

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