Title:
SECAM CHROMA PROCESSING CIRCUIT
Document Type and Number:
Japanese Patent JP3103460
Kind Code:
B2
Abstract:
PURPOSE: To provide a SECAM chrominance signal processing circuit suitable for a configuration using a built-in filter, and add a means to attain no adjustment for the built-in filter.
CONSTITUTION: A belt filter 3 and an inverted bell filter 8 shift a characteristic of a frequency axis and the bell filter 3 extracts a chrominance signal from a recording and reproduction signal of a VTR to receive it. An output of the bell filter 3 is given to a 1/4 frequency divider 4, a 4 multiplier 9 in which the frequency is converted into 1/4 or 4 multiple frequency. Only a desired component of the band signal subject to frequency conversion is fed to the inverted bell filter 8 and the frequency of the bell filter 3 and the inverted bell filter 8 is switched into a desired band frequency through recording and reproduction.
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Inventors:
Akihiro Murayama
Yoshinori Horiguchi
Yoshinori Horiguchi
Application Number:
JP12568993A
Publication Date:
October 30, 2000
Filing Date:
May 27, 1993
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
H04N9/64; H04N9/86; (IPC1-7): H04N9/86; H04N9/64
Domestic Patent References:
| JP58221587A |
Attorney, Agent or Firm:
Saichi Suyama
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