GB1160862A

GB1160862A – Improvements in or relating to Wired Broadcasting Systems
– Google Patents

GB1160862A – Improvements in or relating to Wired Broadcasting Systems
– Google Patents
Improvements in or relating to Wired Broadcasting Systems

Info

Publication number
GB1160862A

GB1160862A
GB2387966A
GB2387966A
GB1160862A
GB 1160862 A
GB1160862 A
GB 1160862A
GB 2387966 A
GB2387966 A
GB 2387966A
GB 2387966 A
GB2387966 A
GB 2387966A
GB 1160862 A
GB1160862 A
GB 1160862A
Authority
GB
United Kingdom
Prior art keywords
carrier wave
colour
information
line
brightness
Prior art date
1966-05-27
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
GB2387966A
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.)
1966-05-27
Filing date
1966-05-27
Publication date
1969-08-06

1966-05-27
Application filed by Communications Patents Ltd
filed
Critical
Communications Patents Ltd

1966-05-27
Priority to GB2387966A
priority
Critical
patent/GB1160862A/en

1967-05-22
Priority to NL6707067A
priority
patent/NL6707067A/xx

1967-05-23
Priority to CH721467A
priority
patent/CH482374A/en

1967-05-23
Priority to DE19671512170
priority
patent/DE1512170A1/en

1967-05-24
Priority to ES340959A
priority
patent/ES340959A1/en

1967-05-26
Priority to BE699046D
priority
patent/BE699046A/xx

1967-05-26
Priority to SE747167A
priority
patent/SE325303B/xx

1967-05-26
Priority to AT494167A
priority
patent/AT277338B/en

1968-05-16
Priority to ES353939A
priority
patent/ES353939A1/en

1969-08-06
Publication of GB1160862A
publication
Critical
patent/GB1160862A/en

Status
Expired
legal-status
Critical
Current

Links

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Global Dossier

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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

H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only

H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system

H04N11/16—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system

Abstract

1,160,862. Colour television; wired broadcasting. COMMUNICATIONS PATENTS Ltd. 19 May, 1967 [27 May, 1966], No. 23879/66. Headings H4F and H4R. A wired broadcasting system comprises a transmitting apparatus 1 which receives PAL type colour television signals radiated from a broadcasting transmitter and modifies them for transmission on conductive network 2, 3 to receivers 6 and 7. In the transmitter 1 the received signals are fed to device 16 which provides on line 17 brightness information and suppressed carrier wave colour carrier information in respect of first and second colour carrier information signals, the phase of the second colour carrier information signal being periodically reversed, on line 18 line scanning pulses, and on line 19 colour bursts. The bursts are fed to a comparator 20 and frequency control arrangement 24 to synchronize an oscillator 21 which generates a pilot carrier wave at the burst frequency. The frequency of the pilot carrier wave is doubled, 26, and phase inverted, 30, every line and the resulting oscillations are modulated, 32, by the brightness and colour carrier information on line 17. After passing through a vestigial sideband filter 341 and being added, 25, to the pilot carrier wave, the signal transmitted over conductors 2, 3 comprises a brightness information carrier component having a carrier wave 8, a suppressed carrier wave colour sub-carrier information component in respect of the first and second colour carrier information signals, having a suppressed sub-carrier wave 10, and a pilot carrier wave 12, the phase of the brightness and first colour information components being reversed at line frequency. The frequencies of the pilot carrier wave 12, the carrier wave 8 and the suppressed sub-carrier wave 10 are related in the ratio 1:2:3. In the receiver 6 the signals from conductors 2, 3 are fed to a bandpass filter 37 which selects the brightness and colour information components. These signals are amplified, 38, and demodulated by an envlope detector 39 to produce on line 40 a brightness information signal of video frequency. The suppressed carrier wave colour sub-carrier information signals are derived from the output of detector 39 by means of a band pass filter 41 and two synchronous detectors 42 and 43. The second colour information signal is obtained from detector 42 by means of a re-insertion carrier wave of constant phase derived from the pilot carrier wave by means of a narrow band pass filter 44 and amplifier 45. The first colour information signal is obtained from detector 43 by means of a reinsertion carrier wave the phase of which is reversed at line frequency derived from a balanced mixer 48 fed with the amplified pilot carrier wave and the brightness carrier wave, the phase of which is reversed at line frequency. The brightness carrier wave is derived from the output of amplifier 38 through a narrow band pass filter 49.

GB2387966A
1966-05-27
1966-05-27
Improvements in or relating to Wired Broadcasting Systems

Expired

GB1160862A
(en)

Priority Applications (9)

Application Number
Priority Date
Filing Date
Title

GB2387966A

GB1160862A
(en)

1966-05-27
1966-05-27
Improvements in or relating to Wired Broadcasting Systems

NL6707067A

NL6707067A
(en)

1966-05-27
1967-05-22

CH721467A

CH482374A
(en)

1966-05-27
1967-05-23

Wire radio system for color television

DE19671512170

DE1512170A1
(en)

1966-05-27
1967-05-23

Wire radio system for color television broadcasts

ES340959A

ES340959A1
(en)

1966-05-27
1967-05-24
Improvements in or relating to Wired Broadcasting Systems

BE699046D

BE699046A
(en)

1966-05-27
1967-05-26

SE747167A

SE325303B
(en)

1966-05-27
1967-05-26

AT494167A

AT277338B
(en)

1966-05-27
1967-05-26

Wire radio system for color television broadcasts

ES353939A

ES353939A1
(en)

1966-05-27
1968-05-16
Improvements in or relating to Wired Broadcasting Systems

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

GB2387966A

GB1160862A
(en)

1966-05-27
1966-05-27
Improvements in or relating to Wired Broadcasting Systems

Publications (1)

Publication Number
Publication Date

GB1160862A
true

GB1160862A
(en)

1969-08-06

Family
ID=10202805
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB2387966A
Expired

GB1160862A
(en)

1966-05-27
1966-05-27
Improvements in or relating to Wired Broadcasting Systems

Country Status (8)

Country
Link

AT
(1)

AT277338B
(en)

BE
(1)

BE699046A
(en)

CH
(1)

CH482374A
(en)

DE
(1)

DE1512170A1
(en)

ES
(2)

ES340959A1
(en)

GB
(1)

GB1160862A
(en)

NL
(1)

NL6707067A
(en)

SE
(1)

SE325303B
(en)

1966

1966-05-27
GB
GB2387966A
patent/GB1160862A/en
not_active
Expired

1967

1967-05-22
NL
NL6707067A
patent/NL6707067A/xx
unknown

1967-05-23
DE
DE19671512170
patent/DE1512170A1/en
active
Pending

1967-05-23
CH
CH721467A
patent/CH482374A/en
not_active
IP Right Cessation

1967-05-24
ES
ES340959A
patent/ES340959A1/en
not_active
Expired

1967-05-26
BE
BE699046D
patent/BE699046A/xx
unknown

1967-05-26
AT
AT494167A
patent/AT277338B/en
not_active
IP Right Cessation

1967-05-26
SE
SE747167A
patent/SE325303B/xx
unknown

1968

1968-05-16
ES
ES353939A
patent/ES353939A1/en
not_active
Expired

Also Published As

Publication number
Publication date

SE325303B
(en)

1970-06-29

ES340959A1
(en)

1968-09-16

DE1512170A1
(en)

1969-04-03

NL6707067A
(en)

1967-11-28

CH482374A
(en)

1969-11-30

AT277338B
(en)

1969-12-29

BE699046A
(en)

1967-11-03

ES353939A1
(en)

1969-10-16

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Legal Events

Date
Code
Title
Description

1969-12-17
PS
Patent sealed

1974-12-11
PLNP
Patent lapsed through nonpayment of renewal fees

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