JPS55140380A - Glance-stealing prevention unit in catv system - Google Patents

Glance-stealing prevention unit in catv system

Info

Publication number
JPS55140380A
JPS55140380A JP4930879A JP4930879A JPS55140380A JP S55140380 A JPS55140380 A JP S55140380A JP 4930879 A JP4930879 A JP 4930879A JP 4930879 A JP4930879 A JP 4930879A JP S55140380 A JPS55140380 A JP S55140380A
Authority
JP
Japan
Prior art keywords
glance
tap
prevention unit
center
catv system
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.)
Pending
Application number
JP4930879A
Other languages
Japanese (ja)
Inventor
Toshinori Matsuwaka
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP4930879A priority Critical patent/JPS55140380A/en
Publication of JPS55140380A publication Critical patent/JPS55140380A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing

Abstract

PURPOSE:To prevent glance-stealing by controlling the switching circuit of the tap- off provided between coaxial cables connecting the center and homes. CONSTITUTION:When terminal 10 of terminal equipment 28 is operated, a control signal is generated, and the switching circuit is opened by the switching control circuit of tap-off 8. Consequently, the transmission signal from center 1 passes through the switching circuit and is transferred to television receiver 11. In case that terminal 10 is not used, the control signal is not transferred to tap-off 8, and consequently, the transmission signal from center 1 is not transmitted to television receiver 11.
JP4930879A 1979-04-20 1979-04-20 Glance-stealing prevention unit in catv system Pending JPS55140380A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4930879A JPS55140380A (en) 1979-04-20 1979-04-20 Glance-stealing prevention unit in catv system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4930879A JPS55140380A (en) 1979-04-20 1979-04-20 Glance-stealing prevention unit in catv system

Publications (1)

Publication Number Publication Date
JPS55140380A true JPS55140380A (en) 1980-11-01

Family

ID=12827310

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4930879A Pending JPS55140380A (en) 1979-04-20 1979-04-20 Glance-stealing prevention unit in catv system

Country Status (1)

Country Link
JP (1) JPS55140380A (en)

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