GB1199801A – Improvements in or relating to Colour Television Transmission
– Google Patents
GB1199801A – Improvements in or relating to Colour Television Transmission
– Google Patents
Improvements in or relating to Colour Television Transmission
Info
Publication number
GB1199801A
GB1199801A
GB11607/67A
GB1160767A
GB1199801A
GB 1199801 A
GB1199801 A
GB 1199801A
GB 11607/67 A
GB11607/67 A
GB 11607/67A
GB 1160767 A
GB1160767 A
GB 1160767A
GB 1199801 A
GB1199801 A
GB 1199801A
Authority
GB
United Kingdom
Prior art keywords
colour
luminance signal
signal
input
adder
Prior art date
1967-03-13
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
GB11607/67A
Inventor
Anthony Norman Heightman
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co 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.)
1967-03-13
Filing date
1967-03-13
Publication date
1970-07-22
1967-03-13
Application filed by Marconi Co Ltd
filed
Critical
Marconi Co Ltd
1967-03-13
Priority to GB11607/67A
priority
Critical
patent/GB1199801A/en
1970-07-22
Publication of GB1199801A
publication
Critical
patent/GB1199801A/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
H04N5/00—Details of television systems
H04N5/14—Picture signal circuitry for video frequency region
H04N5/20—Circuitry for controlling amplitude response
H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
H04N5/208—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
H04N23/13—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths with multiple sensors
Abstract
1,199,801. Colour television. MARCONI CO. Ltd. 5 Jan., 1968 [13 March, 1967], No. 11607/67. Heading H4F. In colour television transmitting apparatus comprising three colour signal camera tubes producing signals E R , EG and E B and a high definition luminance camera tube producing signal E Y , the invention relates to correction for the vertical component of aperture distortion in the luminance signal which does not require a delay line in the direct channel between the input and output terminals (L1 and L0, Fig. 3) of the luminance signal. In a first embodiment, Fig. 3, scanning rasters in the colour tubes are advanced relative to the scanning raster in the luminance tube by one scanning line and the resulting colour signals are delayed by one scanning line interval (delay lines RD, GD and BD) between their input and output terminals. The undelayed colour signals are combined in matrix M to produce a component correction or synthetic luminance signal Ey s comprising 0À3 E R +0À59 E G +0À11 E B , which is added A1 to the luminance signal E y at input terminal L1 after it has been delayed LD for one scanning line interval. The output of adder A1 is reversed in polarity by inverter P and added A2 to the luminance signal E y . The amplitude of the output from adder A2 is adjusted by an adjusting control represented by resistance AR and added A3 to the luminance signal E Y , the resulting luminance signal at output L0 being corrected for the vertical component of aperture distortion. In a second embodiment, Fig. 4 (not shown), both inputs to adder A1 are taken from matrix M, one input being taken thereto directly as in Fig. 3, and the second input being taken via a delay line (2LD) providing a delay of twice the scanning line period. This. second input replaces the input from L1 in Fig. 3. The adder A2 may be dispensed with so long as the control (represented by AR) for adjusting the amplitude of the correcting signal is ganged with a control for adjusting the amplitude of the undelayed luminance signal applied to adder A3. In a third embodiment, Fig. 5 (not shown), the low definition green signal is used instead of the low definition luminance signal (E YS ) and the green signal alone is delayed before transmission since only the scanning raster in the green colour tube is advanced by one line. In a fourth embodiment, Fig. 6 (not shown), the colour signals may be processed in accordance with a television system, e.g. NTSC, PAL or SECAM (Trade Mark) to produce a modulated colour sub-carrier which is delayed by a single delay device before transmission, the arrangement being otherwise as shown in Fig. 3.
GB11607/67A
1967-03-13
1967-03-13
Improvements in or relating to Colour Television Transmission
Expired
GB1199801A
(en)
Priority Applications (1)
Application Number
Priority Date
Filing Date
Title
GB11607/67A
GB1199801A
(en)
1967-03-13
1967-03-13
Improvements in or relating to Colour Television Transmission
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB11607/67A
GB1199801A
(en)
1967-03-13
1967-03-13
Improvements in or relating to Colour Television Transmission
Publications (1)
Publication Number
Publication Date
GB1199801A
true
GB1199801A
(en)
1970-07-22
Family
ID=9989355
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB11607/67A
Expired
GB1199801A
(en)
1967-03-13
1967-03-13
Improvements in or relating to Colour Television Transmission
Country Status (1)
Country
Link
GB
(1)
GB1199801A
(en)
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0011674A1
(en)
*
1978-12-02
1980-06-11
GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig
Method of producing a vertical aperture correction signal for a colour television camera
FR2517912A1
(en)
*
1981-12-03
1983-06-10
Sony Corp
DUAL-SCANNED INTERLACING TELEVISION RECEIVER HAVING A VERTICAL OPENING CORRECTION CIRCUIT
GB2122547A
(en)
*
1982-05-19
1984-01-18
Komori Printing Mach
Method and system of processing image signals
1967
1967-03-13
GB
GB11607/67A
patent/GB1199801A/en
not_active
Expired
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0011674A1
(en)
*
1978-12-02
1980-06-11
GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig
Method of producing a vertical aperture correction signal for a colour television camera
FR2517912A1
(en)
*
1981-12-03
1983-06-10
Sony Corp
DUAL-SCANNED INTERLACING TELEVISION RECEIVER HAVING A VERTICAL OPENING CORRECTION CIRCUIT
GB2122547A
(en)
*
1982-05-19
1984-01-18
Komori Printing Mach
Method and system of processing image signals
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Legal Events
Date
Code
Title
Description
1970-12-02
PS
Patent sealed [section 19, patents act 1949]
1980-08-20
PCNP
Patent ceased through non-payment of renewal fee
