GB1159002A - Improvements in Wired Broadcasting Systems and Apparatus therefor. - Google Patents

Improvements in Wired Broadcasting Systems and Apparatus therefor.

Info

Publication number
GB1159002A
GB1159002A GB1399266A GB1399266A GB1159002A GB 1159002 A GB1159002 A GB 1159002A GB 1399266 A GB1399266 A GB 1399266A GB 1399266 A GB1399266 A GB 1399266A GB 1159002 A GB1159002 A GB 1159002A
Authority
GB
United Kingdom
Prior art keywords
colour
carrier
signal
component
modulated
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
GB1399266A
Inventor
Eric John Gargini
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.)
Communications Patents Ltd
Original Assignee
Communications Patents 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 Communications Patents Ltd filed Critical Communications Patents Ltd
Priority to GB1399266A priority Critical patent/GB1159002A/en
Priority to NL6704351A priority patent/NL6704351A/xx
Priority to DE19671512159 priority patent/DE1512159A1/en
Priority to CH430167A priority patent/CH472160A/en
Priority to AT298867A priority patent/AT278117B/en
Priority to SE425867A priority patent/SE355469B/xx
Priority to BE696220D priority patent/BE696220A/xx
Priority to ES338675A priority patent/ES338675A1/en
Priority to ES350563A priority patent/ES350563A1/en
Publication of GB1159002A publication Critical patent/GB1159002A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable

Landscapes

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

Abstract

1,159,002. Wired boadcasting; colour television. COMMUNICATIONS PATENTS Ltd. 30 March, 1967 [30 March, 1966], No. 13992/66. Headings H4F and H4R. In a colour television wired distribution system the signal fed to the system comprises a modulated carrier brightness information together with a suppressed carrier colour information signal in respect of two colour information signals and a pilot signal of a frequency equal to the frequency of the suppressed carrier and which is modulated by one colour information component. At the receiver one colour component is derived by envelope detection of the pilot signal and the other by synchronous detection of the colour signal using a reinserted carrier derived from the pilot signal. The transmitter 1 comprises a receiver 16 of broadcast signals of a "PAL" system from which the brightness signal and suppressed carrier colour signals are applied to a modulator 20 to modulate a carrier of about 10.5 Mc/s from oscillator 21. The lower sideband is selected by vestigial sideband filter 23 and applied via mixer 24 to the lines 2 and 3. Colour bursts from the receiver are applied to synchronism oscillator 25 at the frequency of the original suppressed carrier of the colour signal, 4.43 Mc/s, which is modulated by one colour component in modulator 27 before being applied to the lines 2 and 3 via mixer 24. At the receiver 6 the brightness component is selected by filter 31 amplified by amplifier 32 and detected in envelope detector 33, from which the brightness signal is fed out over line 34 while the colour signals modulated on the subcarrier are fed to demodulator 36 via filter 35. The pilot signal, modulated by one colour component, is selected by filter 38 amplified and demodulated at 40 to provide one colour component on line 41, the pilot is also passed through a narrow band filter 44, selecting only the carrier, to provide a carrier for demodulating the other colour component in modulator 36, the phase of the carrier being reversed on alternate lines in phase switch 47, controlled by the colour recognition device 37, to demodulate the appropriate colour component from the colour information sub-carrier wave.
GB1399266A 1966-03-30 1966-03-30 Improvements in Wired Broadcasting Systems and Apparatus therefor. Expired GB1159002A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
GB1399266A GB1159002A (en) 1966-03-30 1966-03-30 Improvements in Wired Broadcasting Systems and Apparatus therefor.
NL6704351A NL6704351A (en) 1966-03-30 1967-03-23
DE19671512159 DE1512159A1 (en) 1966-03-30 1967-03-23 Wire radio system for color television broadcasts
CH430167A CH472160A (en) 1966-03-30 1967-03-28 Wire radio system for color television
AT298867A AT278117B (en) 1966-03-30 1967-03-29 WIRE RADIO SYSTEM FOR COLOR TELEVISION SHOWS
SE425867A SE355469B (en) 1966-03-30 1967-03-29
BE696220D BE696220A (en) 1966-03-30 1967-03-29
ES338675A ES338675A1 (en) 1966-03-30 1967-03-30 Improvements in Wired Broadcasting Systems and Apparatus therefor.
ES350563A ES350563A1 (en) 1966-03-30 1968-02-16 Improvements in Wired Broadcasting Systems and Apparatus therefor.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1399266A GB1159002A (en) 1966-03-30 1966-03-30 Improvements in Wired Broadcasting Systems and Apparatus therefor.

Publications (1)

Publication Number Publication Date
GB1159002A true GB1159002A (en) 1969-07-23

Family

ID=10033059

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1399266A Expired GB1159002A (en) 1966-03-30 1966-03-30 Improvements in Wired Broadcasting Systems and Apparatus therefor.

Country Status (7)

Country Link
BE (1) BE696220A (en)
CH (1) CH472160A (en)
DE (1) DE1512159A1 (en)
ES (2) ES338675A1 (en)
GB (1) GB1159002A (en)
NL (1) NL6704351A (en)
SE (1) SE355469B (en)

Also Published As

Publication number Publication date
DE1512159A1 (en) 1969-05-14
NL6704351A (en) 1967-10-02
CH472160A (en) 1969-04-30
BE696220A (en) 1967-09-01
SE355469B (en) 1973-04-16
ES350563A1 (en) 1970-02-01
ES338675A1 (en) 1968-06-01

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee