GB1331456A – Circu-t arrangement for suppressing the chrominance sub-carrier in a pal signal
– Google Patents
GB1331456A – Circu-t arrangement for suppressing the chrominance sub-carrier in a pal signal
– Google Patents
Circu-t arrangement for suppressing the chrominance sub-carrier in a pal signal
Info
Publication number
GB1331456A
GB1331456A
GB5970470A
GB5970470A
GB1331456A
GB 1331456 A
GB1331456 A
GB 1331456A
GB 5970470 A
GB5970470 A
GB 5970470A
GB 5970470 A
GB5970470 A
GB 5970470A
GB 1331456 A
GB1331456 A
GB 1331456A
Authority
GB
United Kingdom
Prior art keywords
signal
line
components
colour
input
Prior art date
1969-12-19
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
GB5970470A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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.)
1969-12-19
Filing date
1970-12-16
Publication date
1973-09-26
1969-12-19
Priority claimed from DE19691963819
external-priority
patent/DE1963819C/en
1970-12-16
Application filed by Philips Electronic and Associated Industries Ltd
filed
Critical
Philips Electronic and Associated Industries Ltd
1973-09-26
Publication of GB1331456A
publication
Critical
patent/GB1331456A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
H04N9/00—Details of colour television systems
H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
H04N9/78—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter
Abstract
1331456 Colour television PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 16 Dec 1970 [19 Dec 1969] 59704/70 Heading H4F The colour information signal (F) of a PAL colour television signal (FBAS) with quarter line offset is suppressed by supplying the signal via an equalizing delay 5 to one input of a subtractor 3, and via a bandpass filter 4 which passes only signals in the F signal frequency range and and two comb filters 1 and 2 to the other input of the subtractor 3. Comb filter 1 adds 11 the direct and approximately one line period (see later) delayed 14 signal, the resulting sum signal being fed back via a feedback network 12 to the input of the delay line. Comb filter 2 is similar to filter 1 but the direct and delayed signals are subtracted due to phase shifter 25. The delay period T of the delay lines 14 and 24 differs from one line period by one quarter of the period of the colour subcarrier of the PAL signal, and specifically is such that 1/T = f z (1-e/n) where e = 0À25, n = 284 and f z is the line frequency. The signals at the outputs of the comb filters comprise the colour difference signals V and U, which are amplified 6 and 7 so that their amplitudes are the same as the V and U components in the FBAS signal from which they are subtracted. The feedback factors of networks 12 and 22 are preferably the same i.e. k, in which case the amplification factor v of amplifiers 6 and 7 comprises v = (1-k
GB5970470A
1969-12-19
1970-12-16
Circu-t arrangement for suppressing the chrominance sub-carrier in a pal signal
Expired
GB1331456A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DE19691963819
DE1963819C
(en)
1969-12-19
Circuit arrangement for suppressing the color subcarrier contained in a PAL signal
Publications (1)
Publication Number
Publication Date
GB1331456A
true
GB1331456A
(en)
1973-09-26
Family
ID=5754422
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5970470A
Expired
GB1331456A
(en)
1969-12-19
1970-12-16
Circu-t arrangement for suppressing the chrominance sub-carrier in a pal signal
Country Status (6)
Country
Link
US
(1)
US3707596A
(en)
JP
(1)
JPS5017814B1
(en)
ES
(1)
ES386542A0
(en)
FR
(1)
FR2071933B1
(en)
GB
(1)
GB1331456A
(en)
NL
(1)
NL7018230A
(en)
Families Citing this family (16)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3858240A
(en)
*
1971-01-11
1974-12-31
Communications Satellite Corp
Reduced rate sampling process in pulse code modulation of analog signals
CH556625A
(en)
*
1972-09-06
1974-11-29
Siemens Ag
SINGLE TUBE COLOR TELEVISION CAMERA WITH COLOR STRIPED FILTERS.
US3895393A
(en)
*
1974-05-14
1975-07-15
Electrohome Ltd
Double comb filter
US4074321A
(en)
*
1976-10-12
1978-02-14
The Magnavox Company
Circuit for separating chroma and luminance information in a composite video signal
JPS53117329A
(en)
*
1977-03-24
1978-10-13
Hitachi Ltd
Processing circuit for color signal
FI69381C
(en)
*
1979-05-11
1986-01-10
Rca Corp
SIGNALBEHANDLINGSANORDNING
GB2069287B
(en)
*
1980-01-30
1983-09-01
Sony Corp
Decoding pal television signals
US4333104A
(en)
*
1980-03-17
1982-06-01
Gte Laboratories Incorporated
Color demodulating apparatus with cross-color cancellation
DE3035647A1
(en)
*
1980-09-20
1982-05-06
Philips Patentverwaltung Gmbh, 2000 Hamburg
CIRCUIT ARRANGEMENT FOR SEPARATING THE COMPONENTS OF A PAL COLOR TELEVISION SIGNAL
JPS6057273B2
(en)
*
1980-12-25
1985-12-13
株式会社東芝
Color signal processing circuit
JPS593088U
(en)
*
1982-06-29
1984-01-10
富士金属工作株式会社
pipe fittings
JPS59128985U
(en)
*
1983-02-18
1984-08-30
エヌオーケー株式会社
Packing for pipe fittings
JPS60114017A
(en)
*
1983-11-26
1985-06-20
Victor Co Of Japan Ltd
Feedback type comb line filter
US4641186A
(en)
*
1984-05-03
1987-02-03
Rca Corporation
Motion detector that extracts motion information from sidebands of a baseband television signal
US4730281A
(en)
*
1985-03-15
1988-03-08
Nl Industries, Inc.
Data processing filtering method and apparatus
JPH0669573U
(en)
*
1993-03-09
1994-09-30
サッポロ産機株式会社
Hard resin pipe joint structure
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
NZ137452A
(en)
*
1963-03-01
DE1266348B
(en)
*
1965-02-12
1968-04-18
Deutsche Bundespost
Method for the selective separation of equidistant frequency groups in a signal spectrum with two pieces of information that are independent of one another, in particular in a color television signal with a carried chrominance component
FR1474859A
(en)
*
1966-01-21
1967-03-31
Cft Comp Fse Television
Improvement in demodulation circuits of a color television subcarrier and transmitters transmitting said subcarrier
1970
1970-12-14
US
US97657A
patent/US3707596A/en
not_active
Expired – Lifetime
1970-12-15
NL
NL7018230A
patent/NL7018230A/xx
not_active
Application Discontinuation
1970-12-16
FR
FR7045391A
patent/FR2071933B1/fr
not_active
Expired
1970-12-16
GB
GB5970470A
patent/GB1331456A/en
not_active
Expired
1970-12-16
JP
JP45111962A
patent/JPS5017814B1/ja
active
Pending
1970-12-17
ES
ES386542A
patent/ES386542A0/en
active
Granted
Also Published As
Publication number
Publication date
FR2071933B1
(en)
1976-05-28
NL7018230A
(en)
1971-06-22
ES386542A1
(en)
1973-03-16
DE1963819A1
(en)
1971-08-12
ES386542A0
(en)
1973-03-16
US3707596A
(en)
1972-12-26
DE1963819B2
(en)
1972-03-16
FR2071933A1
(en)
1971-09-24
JPS5017814B1
(en)
1975-06-24
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Legal Events
Date
Code
Title
Description
1974-02-06
PS
Patent sealed [section 19, patents act 1949]
1986-07-30
PCNP
Patent ceased through non-payment of renewal fee
