GB1512149A - Colour television - Google Patents

Colour television

Info

Publication number
GB1512149A
GB1512149A GB39257/76A GB3925776A GB1512149A GB 1512149 A GB1512149 A GB 1512149A GB 39257/76 A GB39257/76 A GB 39257/76A GB 3925776 A GB3925776 A GB 3925776A GB 1512149 A GB1512149 A GB 1512149A
Authority
GB
United Kingdom
Prior art keywords
colour
signals
sept
correction circuit
detector
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
GB39257/76A
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1512149A publication Critical patent/GB1512149A/en
Expired 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
    • H04N9/64—Circuits for processing colour signals
    • H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control

Abstract

1512149 Colour television ROBERT BOSCH GmbH 22 Sept 1976 [27 Sept 1975] 39257/76 Heading H4F An automatic colour balance correction circuit operates on the three colour values by adding at 4'. 4<SP>11</SP>, 4<SP>111</SP>, a correction signal derived at 3<SP>1</SP>, 3<SP>11</SP>, 3<SP>111</SP> under control of signals from a correction circuit 7 wherein colour difference signals are generated at 6 and are used to determine picture areas having saturation below a predetermined threshold and luminance in a predetermined range (Fig. 2, not shown). The colour difference signals from such picture areas are integrated over several frames and dematrixed to give R, G and B control signals. Particular detail of the saturation threshold detector (Figs. 3 or 5) and of a high luminance value (near white) detector (Fig. 4) are given.
GB39257/76A 1975-09-27 1976-09-22 Colour television Expired GB1512149A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752543218 DE2543218A1 (en) 1975-09-27 1975-09-27 SYSTEM FOR THE INDEPENDENT CORRECTION OF THE COLOR BALANCE BETWEEN THE COLOR VALUE SIGNALS OF A COLOR SIGNAL SOURCE

Publications (1)

Publication Number Publication Date
GB1512149A true GB1512149A (en) 1978-05-24

Family

ID=5957643

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39257/76A Expired GB1512149A (en) 1975-09-27 1976-09-22 Colour television

Country Status (4)

Country Link
CA (1) CA1098614A (en)
DE (1) DE2543218A1 (en)
FR (1) FR2326098A1 (en)
GB (1) GB1512149A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236639A (en) * 1989-07-22 1991-04-10 Broadcast Television Syst Television automatic colour balance correction circuit

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54111720A (en) * 1978-02-22 1979-09-01 Nissan Motor Method of indicating color
US4218699A (en) * 1978-04-03 1980-08-19 Rca Corporation Black level control system for a color television camera
DE3235789C2 (en) * 1982-09-28 1989-05-18 Saurer-Allma Gmbh, 8960 Kempten Swiveling bobbin holder
GB8414450D0 (en) * 1984-06-06 1984-07-11 Motorola Inc Saturation control circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735026A (en) * 1971-09-03 1973-05-22 Columbia Broadcasting Syst Inc Automatic color corrector for a color video signal
DE2448505C3 (en) * 1974-10-11 1978-03-09 Robert Bosch Gmbh, 7000 Stuttgart System for the automatic correction of the color balance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236639A (en) * 1989-07-22 1991-04-10 Broadcast Television Syst Television automatic colour balance correction circuit
GB2236639B (en) * 1989-07-22 1993-12-22 Broadcast Television Syst Circuit arrangement for the automatic correction of colour balance

Also Published As

Publication number Publication date
CA1098614A (en) 1981-03-31
DE2543218A1 (en) 1977-04-07
FR2326098A1 (en) 1977-04-22
FR2326098B1 (en) 1983-01-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920922