JPS5545251A - Filter circuit - Google Patents

Filter circuit

Info

Publication number
JPS5545251A
JPS5545251A JP11842678A JP11842678A JPS5545251A JP S5545251 A JPS5545251 A JP S5545251A JP 11842678 A JP11842678 A JP 11842678A JP 11842678 A JP11842678 A JP 11842678A JP S5545251 A JPS5545251 A JP S5545251A
Authority
JP
Japan
Prior art keywords
circuit
signal
iin
color
feedback
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.)
Pending
Application number
JP11842678A
Other languages
Japanese (ja)
Inventor
Yoshinori Kitamura
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 JP11842678A priority Critical patent/JPS5545251A/en
Publication of JPS5545251A publication Critical patent/JPS5545251A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H15/00—Transversal filters

Landscapes

  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To make it possible to improve the color S/N of a large-area part without lowering vertical sharpness by providing a substractor circuit, a compression circuit and an adder circuit in the feedback-type comb line filter. CONSTITUTION:Color input signal Iin of the NTSC system obtained from the pickup tube of the single carrier frequency separation system is inputted to adder circuit 1, and the output is delayed by one horizontal period delay circuit 2 and is inputted to subtractor circuit 3 to make signal Iin. Then, output signal I1 of circuit 3 is fed back to adder circuit 1 by gain control circuit 4 of feedback quantity k (O<=k<1) and is added to signal Iin to form a feedback-type comb line filter. When output signal I1 and signal Iin are subjected to subtraction by substracter circuit 18, output signal I2 becomes an edge signal corresponding to the vertical edge signal of the picture. When signal I2 is compressed by low-level compression circuit 19 and is added to signal I1 by adder circuit 20, signal Iout where sharpness in the vertical direction is improved is outputted. As a result, the S/N of color signals is improved to prevent the color error of a vertical part from being extended.
JP11842678A 1978-09-25 1978-09-25 Filter circuit Pending JPS5545251A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11842678A JPS5545251A (en) 1978-09-25 1978-09-25 Filter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11842678A JPS5545251A (en) 1978-09-25 1978-09-25 Filter circuit

Publications (1)

Publication Number Publication Date
JPS5545251A true JPS5545251A (en) 1980-03-29

Family

ID=14736343

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11842678A Pending JPS5545251A (en) 1978-09-25 1978-09-25 Filter circuit

Country Status (1)

Country Link
JP (1) JPS5545251A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56149885A (en) * 1980-04-23 1981-11-19 Matsushita Electric Ind Co Ltd Color signal processing circuit
JPS58212289A (en) * 1982-06-03 1983-12-09 Sony Corp Noise eliminating circuit
JPS6047378U (en) * 1983-09-09 1985-04-03 株式会社ケンウッド Video noise canceling device
JPS60177786A (en) * 1984-02-24 1985-09-11 Hitachi Denshi Ltd Video signal processing device
JPS61150513A (en) * 1984-12-25 1986-07-09 Matsushita Electric Ind Co Ltd Comb line filter
JPS6347031B2 (en) * 1980-10-20 1988-09-20 Matsushita Electric Ind Co Ltd
JPH02272894A (en) * 1989-01-09 1990-11-07 Dubner Computer Syst Inc Color image sigal encoding

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56149885A (en) * 1980-04-23 1981-11-19 Matsushita Electric Ind Co Ltd Color signal processing circuit
JPH0211073B2 (en) * 1980-04-23 1990-03-12 Matsushita Electric Ind Co Ltd
JPS6347031B2 (en) * 1980-10-20 1988-09-20 Matsushita Electric Ind Co Ltd
JPS58212289A (en) * 1982-06-03 1983-12-09 Sony Corp Noise eliminating circuit
JPH0378836B2 (en) * 1982-06-03 1991-12-16 Sony Corp
JPS6047378U (en) * 1983-09-09 1985-04-03 株式会社ケンウッド Video noise canceling device
JPH0336150Y2 (en) * 1983-09-09 1991-07-31
JPS60177786A (en) * 1984-02-24 1985-09-11 Hitachi Denshi Ltd Video signal processing device
JPS61150513A (en) * 1984-12-25 1986-07-09 Matsushita Electric Ind Co Ltd Comb line filter
JPH0250649B2 (en) * 1984-12-25 1990-11-05 Matsushita Electric Ind Co Ltd
JPH02272894A (en) * 1989-01-09 1990-11-07 Dubner Computer Syst Inc Color image sigal encoding

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