GB1252332A – – Google Patents
GB1252332A – – Google Patents
Info
Publication number
GB1252332A
GB1252332A
GB1252332DA
GB1252332A
GB 1252332 A
GB1252332 A
GB 1252332A
GB 1252332D A
GB1252332D A
GB 1252332DA
GB 1252332 A
GB1252332 A
GB 1252332A
Authority
GB
United Kingdom
Prior art keywords
horizontal line
television
blanking interval
signals
vertical blanking
Prior art date
1968-06-26
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
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.)
1968-06-26
Filing date
1969-06-20
Publication date
1971-11-03
1969-06-20
Application filed
filed
Critical
1971-11-03
Publication of GB1252332A
publication
Critical
patent/GB1252332A/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
H04N7/00—Television systems
H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
Abstract
1,252,332. Television; multiplex radio signalling. RCA CORPORATION. 20 June 1969 [26 June, 1968], No. 31336/69. Headings H4F and H4L. In the television system for transmitting and receiving message images in addition to television images as described in Specification 1,132,303, supervisory test signals which may be present in the last three horizontal line spaces of each vertical blanking interval are deleted from the composite signal and replaced by the message line signals which would otherwise have been transmitted in the first three horizontal line spaces after the equalizing pulses in each vertical blanking interval. The supervisory test signals may be deleted from the transmitted signal since they are for network and studio use only, and whereas signals occupying the first three horizontal line spaces after the equalizing pulses in each vertical blanking interval cause undesirable brightness modulation on the vertical retrace lines of receivers incorporating inadequate retrace blanking, signal occupying the last three horizontal line spaces of each vertical blanking interval may be transmitted without undesirably interfering with the reception and reproduction of the television pictures. In the embodiment described above the necessary delay imported to the message line signals is equivalent to eight horizontal line spaces. By varying this delay the message line signals may be relocated anywhere in the vertical blanking interval or in the television raster itself, the shifting being in a coherent or random manner e.g. for secret or subscription-type transmission.
GB1252332D
1968-06-26
1969-06-20
Expired
GB1252332A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US74038368A
1968-06-26
1968-06-26
Publications (1)
Publication Number
Publication Date
GB1252332A
true
GB1252332A
(en)
1971-11-03
Family
ID=24976282
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1252332D
Expired
GB1252332A
(en)
1968-06-26
1969-06-20
Country Status (5)
Country
Link
US
(1)
US3576391A
(en)
DE
(1)
DE1929083B2
(en)
FR
(1)
FR2014236B1
(en)
GB
(1)
GB1252332A
(en)
NL
(1)
NL6909720A
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4642688A
(en)
*
1983-06-24
1987-02-10
Scientific Atlanta, Inc.
Method and apparatus for creating encrypted and decrypted television signals
US5553141A
(en)
*
1982-07-12
1996-09-03
Scientific-Atlanta, Inc.
Encryption and decryption (scrambling and unscrambling) of video signals
Families Citing this family (17)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB1425637A
(en)
*
1973-02-15
1976-02-18
British Broadcasting Corp
Television systems
GB1486771A
(en)
*
1973-07-30
1977-09-21
Indep Broadcasting Authority
Television systems
US3891792A
(en)
*
1974-06-25
1975-06-24
Asahi Broadcasting
Television character crawl display method and apparatus
GB1577133A
(en)
*
1976-03-19
1980-10-22
Rca Corp
Video information record and playback apparatus
JPS5949754B2
(en)
*
1976-07-31
1984-12-04
ソニー株式会社
tape editing machine
US4202012A
(en)
*
1977-03-15
1980-05-06
Matsushita Electric Industrial Co., Ltd.
Sampling clock reproducing device
US4195729A
(en)
*
1979-01-12
1980-04-01
Macken John A
Combined photograph holder and storage device
US4965825A
(en)
1981-11-03
1990-10-23
The Personalized Mass Media Corporation
Signal processing apparatus and methods
US7831204B1
(en)
1981-11-03
2010-11-09
Personalized Media Communications, Llc
Signal processing apparatus and methods
USRE47642E1
(en)
1981-11-03
2019-10-08
Personalized Media Communications LLC
Signal processing apparatus and methods
RU2030840C1
(en)
*
1990-10-10
1995-03-10
Владимир Ефимович Теслер
Method of and device for correction of signal distortions from moving object
GB9114245D0
(en)
*
1991-07-02
1991-08-21
Thomson Consumer Electronics
Horizontal line counter insensitive to large phase shifts of video
US5453795A
(en)
*
1991-07-02
1995-09-26
Thomson Consumer Electronics, Inc.
Horizontal line counter insensitive to large phase shifts of video
WO1994013103A1
(en)
*
1992-11-30
1994-06-09
Aktsionernoe Obschestvo ‘informkosmos’
Device for receiving digital signals carrying auxiliary data
DE19522590C2
(en)
*
1995-06-16
2001-05-17
Deutsche Telekom Ag
Method and device for additional data transmission in TV channels
US20060069615A1
(en)
*
2004-09-29
2006-03-30
Ajay Gupta
Systems and methods for subsidizing the printing costs of advertiser-sponsored documents delivered through broadcast networks
WO2006035450A1
(en)
2004-09-29
2006-04-06
Hewlett-Packard Development Company L.P.
Systems and methods for soliciting feedback using print-augmented broadcast signal
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2874213A
(en)
*
1954-06-29
1959-02-17
Rca Corp
Multiplex transmission
US3493674A
(en)
*
1965-05-28
1970-02-03
Rca Corp
Television message system for transmitting auxiliary information during the vertical blanking interval of each television field
NL6512583A
(en)
*
1965-09-29
1967-03-30
US3491199A
(en)
*
1967-05-12
1970-01-20
Xerox Corp
Facsimile multiplex system
1968
1968-06-26
US
US740383A
patent/US3576391A/en
not_active
Expired – Lifetime
1969
1969-06-09
DE
DE19691929083
patent/DE1929083B2/en
active
Pending
1969-06-20
GB
GB1252332D
patent/GB1252332A/en
not_active
Expired
1969-06-25
NL
NL6909720A
patent/NL6909720A/xx
unknown
1969-06-25
FR
FR6921311A
patent/FR2014236B1/fr
not_active
Expired
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US5553141A
(en)
*
1982-07-12
1996-09-03
Scientific-Atlanta, Inc.
Encryption and decryption (scrambling and unscrambling) of video signals
US4642688A
(en)
*
1983-06-24
1987-02-10
Scientific Atlanta, Inc.
Method and apparatus for creating encrypted and decrypted television signals
Also Published As
Publication number
Publication date
US3576391A
(en)
1971-04-27
FR2014236A1
(en)
1970-04-17
DE1929083A1
(en)
1970-07-30
FR2014236B1
(en)
1973-11-16
NL6909720A
(en)
1969-12-30
DE1929083B2
(en)
1971-09-02
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Legal Events
Date
Code
Title
Description
1972-03-15
PS
Patent sealed [section 19, patents act 1949]
1976-01-21
PLNP
Patent lapsed through nonpayment of renewal fees
