JPS5763985A - Processing circuit of chroma signal - Google Patents

Processing circuit of chroma signal

Info

Publication number
JPS5763985A
JPS5763985A JP55139204A JP13920480A JPS5763985A JP S5763985 A JPS5763985 A JP S5763985A JP 55139204 A JP55139204 A JP 55139204A JP 13920480 A JP13920480 A JP 13920480A JP S5763985 A JPS5763985 A JP S5763985A
Authority
JP
Japan
Prior art keywords
circuit
phase
signal
sine
circuits
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
JP55139204A
Other languages
Japanese (ja)
Inventor
Tetsuo Kato
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 JP55139204A priority Critical patent/JPS5763985A/en
Publication of JPS5763985A publication Critical patent/JPS5763985A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To simplify the constitution of a processor by carrying out all processes with use of the digital code and at the same time to avoid the deterioration of signals by varying the frequency (phase) of a chroma signal. CONSTITUTION:The digital chroma signal separated by a digital filter is supplied to an input terminal 1 and then applied to a series circuit of delaying circuits 2-4 having 114 phase respectively. The signals of the circuits 2 and 4 are applied to a subtractor circuit 5, and the signal of the circuit 4 is subtracted from the signal of the circuit 2. At the same time, a desired frequency data is applied to a frequency data input terminal 12, and a desired degree of phase is applied to a sine memory 8 and a cosine memory 9. Thus the sine vlaue and the cosine value are read out of the memories 8 and 9 respectively to be supplied to multipliers 6 and 7. Then the outputs of the circuits 5 and 3 are applied to the multipliers 6 and 7 respectively to be multiplied by the sine value and the cosine value. These outputs of multiplication are added together at an adder circuit 10, and a signal which is varied by a desired degree of phase is delivered through an output terminal 11.
JP55139204A 1980-10-03 1980-10-03 Processing circuit of chroma signal Pending JPS5763985A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55139204A JPS5763985A (en) 1980-10-03 1980-10-03 Processing circuit of chroma signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55139204A JPS5763985A (en) 1980-10-03 1980-10-03 Processing circuit of chroma signal

Publications (1)

Publication Number Publication Date
JPS5763985A true JPS5763985A (en) 1982-04-17

Family

ID=15239969

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55139204A Pending JPS5763985A (en) 1980-10-03 1980-10-03 Processing circuit of chroma signal

Country Status (1)

Country Link
JP (1) JPS5763985A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59174083A (en) * 1983-03-24 1984-10-02 Nec Corp Chromakey signal generator
JPS59207792A (en) * 1983-04-21 1984-11-24 アールシーエー　トムソン　ライセンシング　コーポレイシヨン Hue changing device for digital television signal processing equipment
JPS60132490A (en) * 1983-11-21 1985-07-15 アールシーエー　トムソン　ライセンシング　コーポレーシヨン Device for correcting hue
JPS60223278A (en) * 1984-04-19 1985-11-07 Nec Home Electronics Ltd Digital color correcting device
JPS6139830A (en) * 1984-07-31 1986-02-26 東芝ライテック株式会社 Inducting device
JPS61146090A (en) * 1984-12-20 1986-07-03 Canon Inc Color adjustment device
US5067011A (en) * 1986-04-25 1991-11-19 North American Philips Corporation Method and apparatus for demodulating chrominance signals using a training signal in place of a color burst signal
US5367338A (en) * 1992-02-07 1994-11-22 Deutsche Thomson-Brandt Gmbh Method and apparatus for converting the sampling rates of a digital video signal

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59174083A (en) * 1983-03-24 1984-10-02 Nec Corp Chromakey signal generator
JPS59207792A (en) * 1983-04-21 1984-11-24 アールシーエー　トムソン　ライセンシング　コーポレイシヨン Hue changing device for digital television signal processing equipment
JPS60132490A (en) * 1983-11-21 1985-07-15 アールシーエー　トムソン　ライセンシング　コーポレーシヨン Device for correcting hue
JPS60223278A (en) * 1984-04-19 1985-11-07 Nec Home Electronics Ltd Digital color correcting device
JPS6139830A (en) * 1984-07-31 1986-02-26 東芝ライテック株式会社 Inducting device
JPS61146090A (en) * 1984-12-20 1986-07-03 Canon Inc Color adjustment device
US5067011A (en) * 1986-04-25 1991-11-19 North American Philips Corporation Method and apparatus for demodulating chrominance signals using a training signal in place of a color burst signal
US5367338A (en) * 1992-02-07 1994-11-22 Deutsche Thomson-Brandt Gmbh Method and apparatus for converting the sampling rates of a digital video signal

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