JPS6363152B2 - - Google Patents

Info

Publication number
JPS6363152B2
JPS6363152B2 JP56081624A JP8162481A JPS6363152B2 JP S6363152 B2 JPS6363152 B2 JP S6363152B2 JP 56081624 A JP56081624 A JP 56081624A JP 8162481 A JP8162481 A JP 8162481A JP S6363152 B2 JPS6363152 B2 JP S6363152B2
Authority
JP
Japan
Prior art keywords
signal
center
terminal device
channel
status search
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
JP56081624A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57196680A (en
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 filed Critical
Priority to JP56081624A priority Critical patent/JPS57196680A/ja
Publication of JPS57196680A publication Critical patent/JPS57196680A/ja
Publication of JPS6363152B2 publication Critical patent/JPS6363152B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
JP56081624A 1981-05-27 1981-05-27 Piracy preventing device in catv system Granted JPS57196680A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56081624A JPS57196680A (en) 1981-05-27 1981-05-27 Piracy preventing device in catv system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56081624A JPS57196680A (en) 1981-05-27 1981-05-27 Piracy preventing device in catv system

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP29347989A Division JPH02256335A (ja) 1989-11-10 1989-11-10 Ｃａｔｖシステムにおける盗視防止装置

Publications (2)

Publication Number Publication Date
JPS57196680A JPS57196680A (en) 1982-12-02
JPS6363152B2 true JPS6363152B2 (de) 1988-12-06

Family

ID=13751478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56081624A Granted JPS57196680A (en) 1981-05-27 1981-05-27 Piracy preventing device in catv system

Country Status (1)

Country Link
JP (1) JPS57196680A (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5344894U (de) * 1976-09-21 1978-04-17
JPS5552683A (en) * 1978-10-12 1980-04-17 Micron Kiki Kk Control system for specified video program

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5344894U (de) * 1976-09-21 1978-04-17
JPS5552683A (en) * 1978-10-12 1980-04-17 Micron Kiki Kk Control system for specified video program

Also Published As

Publication number Publication date
JPS57196680A (en) 1982-12-02

Similar Documents

Publication Publication Date Title
US4558358A (en) Cable network monitoring system for CATV system
US4616214A (en) Security system
US4450481A (en) Tamper-resistant, expandable communications system
JP2829159B2 (ja) Ｃａｔｖシステムにおける告知情報通信方法
US6996837B1 (en) Terminal equipment for cable television
US4553204A (en) Central processing unit restoring mechanism for a system having a plurality of central processing units
US4347604A (en) Bi-directional data communications system
US4361903A (en) Data transmission process in a CATV system
US4550341A (en) Unauthorized observation preventing device for CATV system
JPS5819087A (ja) Ｃａｔｖシステムにおけるデ−タ
GB2232031A (en) CATV display with superimposed character information
JPH09130773A (ja) 対話型通信サービスのためのカーブサイド回路
US3347982A (en) Subscription television distribution with controlled rejection filters for carrier and interference signals
US5296932A (en) Non-program signal acquisition system for a television signal receiver
JP3122500B2 (ja) Ｃａｔｖシステム
US4427995A (en) Fail-safe CATV system center facility
JPS6363152B2 (de)
US4398214A (en) Wired television broadcasting system
JPS622758B2 (de)
US20030079232A1 (en) Transmission device, reception device, repeating device, frequency list transmitting device, transmission system, and transmission/reception system
JPH02256335A (ja) Ｃａｔｖシステムにおける盗視防止装置
JPS6247395B2 (de)
JPS5841016B2 (ja) Ｆｍ放送システム
KR0135478B1 (ko) 유선방송망의 쌍방향 데이타 통신 시스템
JPS625394B2 (de)