JPS622756B2 - - Google Patents

Info

Publication number
JPS622756B2
JPS622756B2 JP54114242A JP11424279A JPS622756B2 JP S622756 B2 JPS622756 B2 JP S622756B2 JP 54114242 A JP54114242 A JP 54114242A JP 11424279 A JP11424279 A JP 11424279A JP S622756 B2 JPS622756 B2 JP S622756B2
Authority
JP
Japan
Prior art keywords
code
enable
key
decoder
input
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
JP54114242A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5639685A (en
Inventor
Tsutomu Kanai
Masataka Okada
Toshimi Shiun
Yoichi Iwasaki
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.)
Faurecia Clarion Electronics Co Ltd
Original Assignee
Clarion Co 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 Clarion Co Ltd filed Critical Clarion Co Ltd
Priority to JP11424279A priority Critical patent/JPS5639685A/ja
Publication of JPS5639685A publication Critical patent/JPS5639685A/ja
Publication of JPS622756B2 publication Critical patent/JPS622756B2/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
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
JP11424279A 1979-09-07 1979-09-07 Decoding system Granted JPS5639685A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11424279A JPS5639685A (en) 1979-09-07 1979-09-07 Decoding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11424279A JPS5639685A (en) 1979-09-07 1979-09-07 Decoding system

Publications (2)

Publication Number Publication Date
JPS5639685A JPS5639685A (en) 1981-04-15
JPS622756B2 true JPS622756B2 (Direct) 1987-01-21

Family

ID=14632828

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11424279A Granted JPS5639685A (en) 1979-09-07 1979-09-07 Decoding system

Country Status (1)

Country Link
JP (1) JPS5639685A (Direct)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484027A (en) * 1981-11-19 1984-11-20 Communications Satellite Corporation Security system for SSTV encryption
US4494143A (en) * 1982-03-29 1985-01-15 Rca Corporation Television descrambler with security plug having folded flexible printed circuit board providing tier tag memory
US4802214A (en) * 1982-04-23 1989-01-31 Eagle Comtronics, Inc. Method and apparatus for identifying and rendering operative particular descramblers in a television signal scrambling system
US4696034A (en) * 1984-10-12 1987-09-22 Signal Security Technologies High security pay television system

Also Published As

Publication number Publication date
JPS5639685A (en) 1981-04-15

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