GB1147604A – Improvements in or relating to television transmission systems
– Google Patents
GB1147604A – Improvements in or relating to television transmission systems
– Google Patents
Improvements in or relating to television transmission systems
Info
Publication number
GB1147604A
GB1147604A
GB3007465A
GB3007465A
GB1147604A
GB 1147604 A
GB1147604 A
GB 1147604A
GB 3007465 A
GB3007465 A
GB 3007465A
GB 3007465 A
GB3007465 A
GB 3007465A
GB 1147604 A
GB1147604 A
GB 1147604A
Authority
GB
United Kingdom
Prior art keywords
programme
signal
identification
frames
identification signal
Prior art date
1965-07-15
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
GB3007465A
Inventor
Richard Norman Jackson
Keith Eric Johnson
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 Components Ltd
Original Assignee
Mullard 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.)
1965-07-15
Filing date
1965-07-15
Publication date
1969-04-02
1965-07-15
Application filed by Mullard Ltd
filed
Critical
Mullard Ltd
1965-07-15
Priority to GB3007465A
priority
Critical
patent/GB1147604A/en
1966-07-13
Priority to FR69351A
priority
patent/FR1486701A/en
1966-07-13
Priority to NL6609804A
priority
patent/NL6609804A/xx
1969-04-02
Publication of GB1147604A
publication
Critical
patent/GB1147604A/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
H04N7/002—Special television systems not provided for by H04N7/007 – H04N7/18
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
H04N1/00095—Systems or arrangements for the transmission of the picture signal
H04N1/00098—Systems or arrangements for the transmission of the picture signal via a television channel, e.g. for a series of still pictures with or without sound
Abstract
1,147,604. Television; multiplex radio signalling. MULLARD Ltd. 13 April, 1966 [15 July, 19651, No. 30074/65. Headings H4F and H4L. A method of television transmission employs at the transmitter time-sharing between a plurality of programme sources 1, 2, 3, 4 by transmitting cyclically frames appertaining to each programme in turn so that each cycle of frames contain frames from all the programmes together with added programme identification signals, and employs at each receiver recognition of said identification signals and selection and storage of the frames of a desired programme. The invention is described primarily as applied to the transmission of a large number e.g. 100, educational television programmes in which the programme content primarily comprises still pictures, but reference is also made to transmitting monitoring or warning information. Each programme may be associated with an identification signal which differs from the identification signals of all other programmes. The recognition and selection means at each receiver are adapted to recognize any one of said identification signals. Alternatively, the identification signals may be constituted by a reference signal occurring at one point in each cycle of programme frames. In this case the recognition and selection means at each receiver are adapted to detect each reference signal and thereby initiate a count of a number of frames such as to terminate at the frame appertaining to the desired programme. Combinations of the above two modes of operation can be adopted, namely, a plurality of reference signals may be transmitted in each cycle, each signal being spaced from the next one by a whole number or series of frames. Where a separate identification signal is utilized for each programme this may conveniently be inserted in the field blanking interval. The signal may comprise a group of pulses arranged to identify the programme according to a binary code. The signal is repeated in each of six successive lines in the field blanking interval to ensure positive operation of the identification circuits in a receiver. Where the identification signal is inserted at a point in the cycle and a frame is determined by initiating a count, the identification signal may occupy the whole of a frame period. As illustrated in the drawing, the identification signal generator controls the sequencing switch whereby the programme sources 1, 2, 3, 4 are selected and adds the identification signal to the final composite signal. In order to permit the identification signal to be distinguished from interference the pulses which comprise the signal may be comprised of bursts ” of tone, Fig. 4b (not shown). At the receiver, Fig. 3 (not shown), the identification signal is separated from the video signal by means of a gate stage (G) which is controlled during the appropriate portion of the field blanking interval by means of pulses from a field gate pulse generator. Where the pulses of the identification signal comprise ” bursts ” of tone a filter (F) and detector (#) are included in the path to gate G. The individual pulses of the identification signal are directed into the input channels of a register (R) by means of a sequence switch (X1) controlled by a sequence pulse generator (Q). The register is cleared before each identification signal so that it takes up in turn each of the identification signals as they are received. A desired programme is selected by means of a switch (X2) which sets up a binary code combination corresponding to that of the desired programme. A coincidence recognition gate (C) compares the code combination for the desired programme with the code combinations of the incoming programmes as setup in register (R) and when coincidence occurs produces the pulse which operates a mode pulse generator (M). This then opens a gate (V) to allow the corresponding frame of the video input to pass into a video store (S). The video store (S), which comprises for example a cathode-ray tube store or a magnetic tape apparatus, stores the programme frame and thereafter permits it to be reproduced repeatedly to provide signals to a cathode-ray tube display (D). Mode pulse and generator (M) produces the required signals to cause store (S) to be erased and primed at the appropriate time before the arrival of the next frame of the selected programme. Reference is made to systems for linear and branching educational programmes in which the required frames of information are selected by operating switch (X2) to change from programme to programme in the cycle of programmes which are received.
GB3007465A
1965-07-15
1965-07-15
Improvements in or relating to television transmission systems
Expired
GB1147604A
(en)
Priority Applications (3)
Application Number
Priority Date
Filing Date
Title
GB3007465A
GB1147604A
(en)
1965-07-15
1965-07-15
Improvements in or relating to television transmission systems
FR69351A
FR1486701A
(en)
1965-07-15
1966-07-13
TV transmission system
NL6609804A
NL6609804A
(en)
1965-07-15
1966-07-13
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB3007465A
GB1147604A
(en)
1965-07-15
1965-07-15
Improvements in or relating to television transmission systems
Publications (1)
Publication Number
Publication Date
GB1147604A
true
GB1147604A
(en)
1969-04-02
Family
ID=10301859
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3007465A
Expired
GB1147604A
(en)
1965-07-15
1965-07-15
Improvements in or relating to television transmission systems
Country Status (2)
Country
Link
GB
(1)
GB1147604A
(en)
NL
(1)
NL6609804A
(en)
Cited By (17)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS4869413A
(en)
*
1971-12-17
1973-09-20
Hughes Aircraft Co
JPS4895749A
(en)
*
1972-03-18
1973-12-07
JPS4916327A
(en)
*
1972-05-21
1974-02-13
JPS4929917A
(en)
*
1972-07-19
1974-03-16
JPS4979121A
(en)
*
1972-12-01
1974-07-31
JPS4980918A
(en)
*
1972-08-03
1974-08-05
DE2407414A1
(en)
*
1973-02-15
1974-08-29
British Broadcasting Corp
TELEVISION TRANSMISSION SYSTEM
JPS4991527A
(en)
*
1972-12-29
1974-09-02
JPS49119516A
(en)
*
1973-03-14
1974-11-15
JPS50114912A
(en)
*
1974-02-18
1975-09-09
JPS513712A
(en)
*
1974-06-28
1976-01-13
Kunihiro Suetake
JPS5544693U
(en)
*
1979-09-20
1980-03-24
GB2197416A
(en)
*
1986-09-12
1988-05-18
Horton Mfg Co Inc
Clutch/brake rotational control apparatus
US4750595A
(en)
*
1986-09-12
1988-06-14
Horton Manufacturing Co., Inc.
Rotational control apparatus
US4766986A
(en)
*
1987-02-06
1988-08-30
Horton Manufacturing Co., Inc.
Rotational control apparatus
GB2238926A
(en)
*
1989-12-07
1991-06-12
Secretary Of The State For Def
Video multiplexer for surveillance installation
US5497187A
(en)
*
1991-11-29
1996-03-05
Scientific-Atlanta, Inc.
In-band/out-of-band data transmission method and apparatus for a television system
1965
1965-07-15
GB
GB3007465A
patent/GB1147604A/en
not_active
Expired
1966
1966-07-13
NL
NL6609804A
patent/NL6609804A/xx
unknown
Cited By (23)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS4869413A
(en)
*
1971-12-17
1973-09-20
Hughes Aircraft Co
JPS4895749A
(en)
*
1972-03-18
1973-12-07
JPS5630749B2
(en)
*
1972-03-18
1981-07-16
JPS4916327A
(en)
*
1972-05-21
1974-02-13
JPS4929917A
(en)
*
1972-07-19
1974-03-16
JPS4980918A
(en)
*
1972-08-03
1974-08-05
JPS4979121A
(en)
*
1972-12-01
1974-07-31
JPS5348053B2
(en)
*
1972-12-01
1978-12-26
JPS4991527A
(en)
*
1972-12-29
1974-09-02
DE2407414A1
(en)
*
1973-02-15
1974-08-29
British Broadcasting Corp
TELEVISION TRANSMISSION SYSTEM
JPS49119516A
(en)
*
1973-03-14
1974-11-15
JPS5245609B2
(en)
*
1973-03-14
1977-11-17
JPS50114912A
(en)
*
1974-02-18
1975-09-09
JPS513712A
(en)
*
1974-06-28
1976-01-13
Kunihiro Suetake
JPS598111B2
(en)
*
1974-06-28
1984-02-22
スエタケ クニヒロ
Video signal switching method
JPS565414Y2
(en)
*
1979-09-20
1981-02-05
JPS5544693U
(en)
*
1979-09-20
1980-03-24
GB2197416A
(en)
*
1986-09-12
1988-05-18
Horton Mfg Co Inc
Clutch/brake rotational control apparatus
US4750595A
(en)
*
1986-09-12
1988-06-14
Horton Manufacturing Co., Inc.
Rotational control apparatus
GB2197416B
(en)
*
1986-09-12
1991-06-05
Horton Mfg Co Inc
Rotational control apparatus
US4766986A
(en)
*
1987-02-06
1988-08-30
Horton Manufacturing Co., Inc.
Rotational control apparatus
GB2238926A
(en)
*
1989-12-07
1991-06-12
Secretary Of The State For Def
Video multiplexer for surveillance installation
US5497187A
(en)
*
1991-11-29
1996-03-05
Scientific-Atlanta, Inc.
In-band/out-of-band data transmission method and apparatus for a television system
Also Published As
Publication number
Publication date
NL6609804A
(en)
1967-01-16
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