JPS57142093A - Digital chrominance signal generator - Google Patents

Digital chrominance signal generator

Info

Publication number
JPS57142093A
JPS57142093A JP56028234A JP2823481A JPS57142093A JP S57142093 A JPS57142093 A JP S57142093A JP 56028234 A JP56028234 A JP 56028234A JP 2823481 A JP2823481 A JP 2823481A JP S57142093 A JPS57142093 A JP S57142093A
Authority
JP
Japan
Prior art keywords
data
bit
chrominance
chrominance signal
counter
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
JP56028234A
Other languages
Japanese (ja)
Inventor
Hideji Hirakawa
Akihiko Minami
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
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56028234A priority Critical patent/JPS57142093A/en
Publication of JPS57142093A publication Critical patent/JPS57142093A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/18—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous and sequential signals, e.g. SECAM-system
    • H04N11/186—Decoding means therefor

Abstract

PURPOSE:To reduce the data storage capacity, by storing data to a phase from 0 to 360/(n-1) deg. (where; n is a multiple of chrominance subcarrier frequency) and generating a chrominance signal from 0-360 deg.. CONSTITUTION:A chrominance signal data is stored in a read only memory 51, and a readout address is designated with a data in 9-bit. The 2-bit is a data showing phase (0-89 deg.)-(270-359 deg.), and the remaining 7-bit designates the address corresponding to each phase. Further, the remaining 2-bit is applied to a tetral notation counter 52 to which four times frequency clock pulse Cp of chrominance subcarrier frequency is applied as a preset signal. A load pulse Lp synchronized with the chrominance subcarrier wave is applied to the counter 52 and four operations are given to the chrominance subcarrier wave in the counter 52 and the chrominance signal data of the memory 51 is read in the prescribed other.
JP56028234A 1981-02-27 1981-02-27 Digital chrominance signal generator Pending JPS57142093A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56028234A JPS57142093A (en) 1981-02-27 1981-02-27 Digital chrominance signal generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56028234A JPS57142093A (en) 1981-02-27 1981-02-27 Digital chrominance signal generator

Publications (1)

Publication Number Publication Date
JPS57142093A true JPS57142093A (en) 1982-09-02

Family

ID=12242898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56028234A Pending JPS57142093A (en) 1981-02-27 1981-02-27 Digital chrominance signal generator

Country Status (1)

Country Link
JP (1) JPS57142093A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647620A1 (en) * 1989-05-26 1990-11-30 Rca Licensing Corp PHASE LOCKED SUB-CARRIER REGENERATOR

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52127740A (en) * 1976-04-19 1977-10-26 Chubu Nippon Housou Kk Phase modulating system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52127740A (en) * 1976-04-19 1977-10-26 Chubu Nippon Housou Kk Phase modulating system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647620A1 (en) * 1989-05-26 1990-11-30 Rca Licensing Corp PHASE LOCKED SUB-CARRIER REGENERATOR

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