GB1208948A - Television system for two classes of information - Google Patents

Television system for two classes of information

Info

Publication number
GB1208948A
GB1208948A GB2614868A GB2614868A GB1208948A GB 1208948 A GB1208948 A GB 1208948A GB 2614868 A GB2614868 A GB 2614868A GB 2614868 A GB2614868 A GB 2614868A GB 1208948 A GB1208948 A GB 1208948A
Authority
GB
United Kingdom
Prior art keywords
special
receiver
signal
store
signals
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
GB2614868A
Inventor
Charles Anthony Morchand
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1208948A publication Critical patent/GB1208948A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/4448—Receiver circuitry for the reception of television signals according to analogue transmission standards for frame-grabbing
    • 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
    • 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
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00281—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal
    • H04N1/00283—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal with a television apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Television Systems (AREA)

Abstract

1,208,948. Multiplex radio signalling. C. A. MORCHAND. 31 May, 1968 [6 July, 1967; 13 Nov., 1967; 15 March, 1968], No. 26148/68. Heading H4L. Means are provided for transmitting special viewer information signals by substituting them for at least a part of selected frames of general viewer television signals. As shown, a television transmitter 10 transmits to a plurality of receivers 12, 14, 16, 19 and 25. Receiver 12 is for a special viewer who can call via line 36 for desired information from a store 24. Receiver 14 is for a special viewer receiving information from the store 24, receiver 16 is for a viewer watching the broadcast TV programme, receiver 19 provides a special viewer with a permanent copy of information from the store 24 and receiver 25 includes a persistent display device for a special viewer. The normal broadcast programme is transmitted from system 18 via combiner 20 and amplifier 22, and " start of field pulses " in the form of vertical sync. pulses or vertical blanking pulses are fed to a control circuit 28 which via line 38 selects periodically, or in response to a signal on line 36, a field of special programme material from the store 24. This selected information is fed to a buffer store 26 and when the transfer is completed, the next start-of-field pulse causes control 28 to cause combiner 20 to stop accepting signals from 18 and to accept signals from the buffer store 26. Control 28 also supplies a characteristic tone signal, different for each special programme, which is combined at 20 with the audio signal of the TV channel, but is outside the normal audio passband, and supplies a signal to buffer store 26 to start the read-out. The next startof-field pulse restores control 28 to its initial state. Receiver 14 is shown switched to receive the special signals and includes a decoder 414 which may be provided with several differently tuned circuits which may be switched so that one of several possible special programme sequences may be selected. When a characteristic tone is received the decoder sends a signal to control circuit 314 which erases any signals in a store 214 and opens the store for a fixed period to accept the forthcoming field of the special TV signal, after which the signals are supplied to the display device 114. Receiver 12 is similar to receiver 14 but has the additional facility of transmitting a call signal from device 120 via line or other link 36, the device 120 also controlling decoder 412. The control 28 may be arranged to signal back via line 36 the number of start-of-field signals which will occur before transmission of the desired signal.
GB2614868A 1967-07-06 1968-05-31 Television system for two classes of information Expired GB1208948A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US65140967A 1967-07-06 1967-07-06
US68197267A 1967-11-13 1967-11-13
US71829868A 1968-03-15 1968-03-15

Publications (1)

Publication Number Publication Date
GB1208948A true GB1208948A (en) 1970-10-14

Family

ID=27417863

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2614868A Expired GB1208948A (en) 1967-07-06 1968-05-31 Television system for two classes of information

Country Status (3)

Country Link
DE (1) DE1762550A1 (en)
GB (1) GB1208948A (en)
NL (1) NL6809581A (en)

Also Published As

Publication number Publication date
NL6809581A (en) 1969-01-08
DE1762550A1 (en) 1970-08-20

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees