JPS57196680A - Piracy preventing device in catv system - Google Patents

Piracy preventing device in catv system

Info

Publication number
JPS57196680A
JPS57196680A JP56081624A JP8162481A JPS57196680A JP S57196680 A JPS57196680 A JP S57196680A JP 56081624 A JP56081624 A JP 56081624A JP 8162481 A JP8162481 A JP 8162481A JP S57196680 A JPS57196680 A JP S57196680A
Authority
JP
Japan
Prior art keywords
signal
piracy
timer
section
clock
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.)
Granted
Application number
JP56081624A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6363152B2 (enrdf_load_stackoverflow
Inventor
Akihiko Naito
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 Corp
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 Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
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 true JPS57196680A (en) 1982-12-02
JPS6363152B2 JPS6363152B2 (enrdf_load_stackoverflow) 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 (enrdf_load_stackoverflow)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5344894U (enrdf_load_stackoverflow) * 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 (enrdf_load_stackoverflow) * 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
JPS6363152B2 (enrdf_load_stackoverflow) 1988-12-06

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