GB1510117A - Wired broadcasting systems - Google Patents

Wired broadcasting systems

Info

Publication number
GB1510117A
GB1510117A GB2959474A GB2959474A GB1510117A GB 1510117 A GB1510117 A GB 1510117A GB 2959474 A GB2959474 A GB 2959474A GB 2959474 A GB2959474 A GB 2959474A GB 1510117 A GB1510117 A GB 1510117A
Authority
GB
United Kingdom
Prior art keywords
exchange
programme
button
wires
tone
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
GB2959474A
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.)
Communications Patents Ltd
Original Assignee
Communications Patents 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.)
Filing date
Publication date
Application filed by Communications Patents Ltd filed Critical Communications Patents Ltd
Priority to GB2959474A priority Critical patent/GB1510117A/en
Publication of GB1510117A publication Critical patent/GB1510117A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/14—Arrangements for conditional access to broadcast information or to broadcast-related services
    • H04H60/21—Billing for the use of broadcast information or broadcast-related information
    • H04H60/22—Billing for the use of broadcast information or broadcast-related information per use
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/76—Wired systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/38—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space
    • H04H60/41—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas
    • H04H60/44—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas for identifying broadcast stations

Abstract

1510117 Wired broadcasting systems COMMUNICATIONS PATENTS Ltd 4 July 1975 [4 July 1974] 29594/74 Heading H4R A programme selection button in a subscriber unit of a wired broadcast system is held in a latched position after depression and is only released in response to the receipt from a programme exchange of a digitally coded multibit interrogation signal unique to the subscriber unit, the unit responding to the interrogation signal to emit a signal to the exchange only if the selection button was in the latched position. The arrangement is used for billing purposes in a TV distribution system. To select a programme a latching button 9 is depressed to close contacts 3, 4 and 10. At the end of the programme the exchange applies a low D.C. or A.C. voltage to the programme wires 1, 2 to charge capacitors 12, 13, at each subscriber unit and then transmits in sequence address signals corresponding to each subscriber unit. The address is detected by a unit 19 which supplies an enable pulse to a thyristor 22 and an oscillator 20, the oscillator receiving a second enable input from capacitor 13 if switch 10 is closed to send a response tone to the exchange wires 1, 2. The enabled thyristor causes capacitor 12 to discharge through solenoid 11 to release the latched button 9. In a second embodiment (Fig. 2, not shown) a pair of signalling wires separate from the exchange programme wires is provided, and the oscillator 20 is replaced by an amplifier, the exchange sending after each interrogation signal a reply tone which is only amplified and returned to the exchange as the response tone if the button 9 has been depressed. The response tone may be supplied to the exchange wires throughout the release period of the button so that a faulty release mechanism can be detected at the exchange. The response tone may be a harmonic of the tone received by the amplifier. This may be achieved using a frequency multiplier.
GB2959474A 1975-07-04 1975-07-04 Wired broadcasting systems Expired GB1510117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2959474A GB1510117A (en) 1975-07-04 1975-07-04 Wired broadcasting systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2959474A GB1510117A (en) 1975-07-04 1975-07-04 Wired broadcasting systems

Publications (1)

Publication Number Publication Date
GB1510117A true GB1510117A (en) 1978-05-10

Family

ID=10294009

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2959474A Expired GB1510117A (en) 1975-07-04 1975-07-04 Wired broadcasting systems

Country Status (1)

Country Link
GB (1) GB1510117A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2121656A (en) * 1982-05-14 1983-12-21 Communications Patents Ltd Communications system
GB2164229A (en) * 1982-05-14 1986-03-12 Communications Patents Ltd Communications system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2121656A (en) * 1982-05-14 1983-12-21 Communications Patents Ltd Communications system
GB2164229A (en) * 1982-05-14 1986-03-12 Communications Patents Ltd Communications system

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee