JPS558183A - Space frequency improvement circuit for color signal - Google Patents

Space frequency improvement circuit for color signal

Info

Publication number
JPS558183A
JPS558183A JP8178878A JP8178878A JPS558183A JP S558183 A JPS558183 A JP S558183A JP 8178878 A JP8178878 A JP 8178878A JP 8178878 A JP8178878 A JP 8178878A JP S558183 A JPS558183 A JP S558183A
Authority
JP
Japan
Prior art keywords
lpf
signal
luminance
color difference
variation amount
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
JP8178878A
Other languages
Japanese (ja)
Other versions
JPS6049396B2 (en
Inventor
Yoshio Ishigaki
Takafumi Okada
Shoji Omori
Takahisa Tsuchiya
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP53081788A priority Critical patent/JPS6049396B2/en
Publication of JPS558183A publication Critical patent/JPS558183A/en
Publication of JPS6049396B2 publication Critical patent/JPS6049396B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE: To improve the space frequency of the color difference signal by providing the LPF featuring a lower cut-off frequency than the LPF which deletes the high- band signal of the luminance signal and then detecting the variation quantity of amplitude from the low-band signal drawn out of the LPF.
CONSTITUTION: The following LPF's are provided to each input signal: LPF16 to separate luminance signal YH into low-band signal YL and high-band signal YH; LPF11R, 11B and 11G to match the characteristics corresponding to LPF16; and LPF2 featuring a lower cut-off frequency than these LPF's. The output of LPF2 of each luminance and color signals is supplied to differential circuits 9, 12R, 12B and 12G each to obtain the variation amount of the amplitude. Then ratio SD is obtained through dividers 10R, 10B and 10G between the variation amount of the color difference signal and variation amount YLL of the luminance signal. This result is then multiplied by signal YH via multipliers 13R, 13B and 13G to deliver correction signals SPR, SPG and SPG each. These correction signals are compounded with the output of LPF1 of the color difference signal through compounding units 14R, 14B and 14G each, and then supplied to matrix circuit 5 to produce primary color signals R, B and G respectively.
COPYRIGHT: (C)1980,JPO&Japio
JP53081788A 1978-07-05 1978-07-05 Color signal spatial frequency characteristic improvement circuit Expired JPS6049396B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53081788A JPS6049396B2 (en) 1978-07-05 1978-07-05 Color signal spatial frequency characteristic improvement circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53081788A JPS6049396B2 (en) 1978-07-05 1978-07-05 Color signal spatial frequency characteristic improvement circuit

Publications (2)

Publication Number Publication Date
JPS558183A true JPS558183A (en) 1980-01-21
JPS6049396B2 JPS6049396B2 (en) 1985-11-01

Family

ID=13756218

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53081788A Expired JPS6049396B2 (en) 1978-07-05 1978-07-05 Color signal spatial frequency characteristic improvement circuit

Country Status (1)

Country Link
JP (1) JPS6049396B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61240972A (en) * 1985-04-17 1986-10-27 武田ポンプ産業株式会社 Automatic fire extinguishing apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63180589U (en) * 1987-05-11 1988-11-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61240972A (en) * 1985-04-17 1986-10-27 武田ポンプ産業株式会社 Automatic fire extinguishing apparatus

Also Published As

Publication number Publication date
JPS6049396B2 (en) 1985-11-01

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