ES302506A1 - A color television receiver apparatus. (Machine-translation by Google Translate, not legally binding) - Google Patents

A color television receiver apparatus. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES302506A1
ES302506A1 ES0302506A ES302506A ES302506A1 ES 302506 A1 ES302506 A1 ES 302506A1 ES 0302506 A ES0302506 A ES 0302506A ES 302506 A ES302506 A ES 302506A ES 302506 A1 ES302506 A1 ES 302506A1
Authority
ES
Spain
Prior art keywords
subcarrier
period
fixation
demodulator
during
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.)
Expired
Application number
ES0302506A
Other languages
Spanish (es)
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.)
CFT COMP FSE TELEVISION
Compagnie Francaise de Television SA
Original Assignee
CFT COMP FSE TELEVISION
Compagnie Francaise de Television SA
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 CFT COMP FSE TELEVISION, Compagnie Francaise de Television SA filed Critical CFT COMP FSE TELEVISION
Publication of ES302506A1 publication Critical patent/ES302506A1/en
Expired 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/72—Circuits for processing colour signals for reinsertion of DC and slowly varying components of colour signals

Abstract

A color television receiver apparatus intended to operate in a color television system in which the video-complex signal comprises a luminance signal and a subcarrier modulated alternately in frequency by two color signals alternating with the line frequency, said color signals being subjected, in the emission, to a pre-emphasis that increases the amplitude of their higher frequencies in relation to the amplitude of their lower frequencies, said subcarrier being eliminated in the course of each line suppression interval during a period of time encompassing the transmission of the line synchronization pulse, said receiver comprising at least one frequency demodulator for the demodulation of said subcarrier, a device for de-emphasizing a signal originating at least in part from said demodulator, and a device for fixation of a signal that comes at least in part from said desmod ulator, said fixing being carried out by alignment on a fixed level of a reference level that appears at the entrance of said fixing device in the course of each line suppression interval, characterized in that the fixing device is made in such a way that the reference signal used for the fixation can not be influenced significantly by signals transmitted by said demodulator during the terminal portion of the elimination period of the subcarrier, this result being achieved: either by insertion of the fixing device before said de-emphasis device, being able to then start the fixation after the restoration of the subcarrier; or by a device that conveniently delays the start of the fixation period in relation to the moment of restoration of the subcarrier; or by a device that blocks, during each line suppression interval, the operation of said demodulator at least during the terminal portion of the elimination period of the subcarrier and by a device that conveniently delays the beginning of the fixation period with relation to the beginning of the blocking period. (Machine-translation by Google Translate, not legally binding)
ES0302506A 1963-07-30 1964-07-29 A color television receiver apparatus. (Machine-translation by Google Translate, not legally binding) Expired ES302506A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR943099A FR1382948A (en) 1963-07-30 1963-07-30 Improvements to color television systems
FR978248A FR85938E (en) 1963-07-30 1964-06-15 Improvements to color television systems

Publications (1)

Publication Number Publication Date
ES302506A1 true ES302506A1 (en) 1965-05-16

Family

ID=26202630

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0302506A Expired ES302506A1 (en) 1963-07-30 1964-07-29 A color television receiver apparatus. (Machine-translation by Google Translate, not legally binding)

Country Status (9)

Country Link
AT (1) AT253585B (en)
BE (1) BE650968A (en)
CH (1) CH423873A (en)
DE (1) DE1274169B (en)
ES (1) ES302506A1 (en)
FR (2) FR1382948A (en)
GB (1) GB1053877A (en)
LU (1) LU46598A1 (en)
NL (1) NL153753B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE755583A (en) * 1969-09-05 1971-02-15 Rca Corp Demodulator circuit for PAL / SECAM decoder
DE3831240A1 (en) * 1988-09-14 1990-03-22 Thomson Brandt Gmbh DEMODULATOR FOR FREQUENCY MODULATED IMAGE SIGNALS

Also Published As

Publication number Publication date
NL153753B (en) 1977-06-15
FR85938E (en) 1965-11-05
CH423873A (en) 1966-11-15
BE650968A (en) 1964-11-16
GB1053877A (en)
LU46598A1 (en) 1964-09-22
NL6408487A (en) 1965-02-01
DE1274169B (en) 1968-08-01
FR1382948A (en) 1964-12-24
AT253585B (en) 1967-04-10

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