JPS59216389A - 映像信号伝送方式 - Google Patents

映像信号伝送方式

Info

Publication number
JPS59216389A
JPS59216389A JP58090940A JP9094083A JPS59216389A JP S59216389 A JPS59216389 A JP S59216389A JP 58090940 A JP58090940 A JP 58090940A JP 9094083 A JP9094083 A JP 9094083A JP S59216389 A JPS59216389 A JP S59216389A
Authority
JP
Japan
Prior art keywords
signal
video signal
circuit
video
polarity
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
JP58090940A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0115232B2 (enrdf_load_html_response
Inventor
Akira Fujii
章 藤井
Chuji Tokunaga
忠次 徳永
Hiroaki Adachi
安達　弘晃
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP58090940A priority Critical patent/JPS59216389A/ja
Priority to US06/612,835 priority patent/US4599648A/en
Priority to EP84105891A priority patent/EP0127125B1/en
Priority to DE8484105891T priority patent/DE3484115D1/de
Priority to CA000454893A priority patent/CA1224264A/en
Publication of JPS59216389A publication Critical patent/JPS59216389A/ja
Publication of JPH0115232B2 publication Critical patent/JPH0115232B2/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
    • H04N7/171—Systems operating in the amplitude domain of the television signal
    • 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
    • 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
    • H04N7/171—Systems operating in the amplitude domain of the television signal
    • H04N7/1713—Systems operating in the amplitude domain of the television signal by modifying synchronisation signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Television Systems (AREA)
JP58090940A 1983-05-24 1983-05-24 映像信号伝送方式 Granted JPS59216389A (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP58090940A JPS59216389A (ja) 1983-05-24 1983-05-24 映像信号伝送方式
US06/612,835 US4599648A (en) 1983-05-24 1984-05-22 Video signal transmission systems
EP84105891A EP0127125B1 (en) 1983-05-24 1984-05-23 Video signal transmission system
DE8484105891T DE3484115D1 (de) 1983-05-24 1984-05-23 Videosignaluebertragungssystem.
CA000454893A CA1224264A (en) 1983-05-24 1984-05-23 Video signal transmission systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58090940A JPS59216389A (ja) 1983-05-24 1983-05-24 映像信号伝送方式

Publications (2)

Publication Number Publication Date
JPS59216389A true JPS59216389A (ja) 1984-12-06
JPH0115232B2 JPH0115232B2 (enrdf_load_html_response) 1989-03-16

Family

ID=14012445

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58090940A Granted JPS59216389A (ja) 1983-05-24 1983-05-24 映像信号伝送方式

Country Status (1)

Country Link
JP (1) JPS59216389A (enrdf_load_html_response)

Also Published As

Publication number Publication date
JPH0115232B2 (enrdf_load_html_response) 1989-03-16

Similar Documents

Publication Publication Date Title
KR880001922B1 (ko) 비데오 테이프의 복제불능 녹화방법 및 그 장치
JPH027555B2 (enrdf_load_html_response)
JPS60137190A (ja) Ｃａｔｖシステムにおけるスクランブル・デスクランブル方式
US3067280A (en) Secret signaling
EP0127125B1 (en) Video signal transmission system
JPH03272293A (ja) テレビジョン信号のスクランブル方法および装置
JPS59216389A (ja) 映像信号伝送方式
GB2042846A (en) Secret television
CA1204162A (en) Audio scrambler utilizing an auxiliary channel for synchronizing the descrambler
KR20000077240A (ko) 영상 신호 출력 장치 및 영상 신호 입력 장치
JP2703758B2 (ja) Ｔｖ信号送受信システム
JPS60220686A (ja) テレビジョン秘匿装置
JP2940314B2 (ja) クランプ回路
JPS6112186A (ja) 暗号方式
JPS60111584A (ja) テレビジヨン信号のスクランブル方式
JPS5947886A (ja) スクランブル・システム
KR960014687B1 (ko) 종합유선방송시스템의 스크램블링 및 디스크램블링 방법 및 장치
JPH0120586B2 (enrdf_load_html_response)
JPS5824285A (ja) 有料テレビジヨン方式
JPS5950682A (ja) 映像信号識別装置
JPH0525438B2 (enrdf_load_html_response)
JPS6190586A (ja) 映像信号生成回路
JPS60109390A (ja) テレビジヨン信号のスクランブル方式
JPS60184A (ja) 画像伝送方式
JPS5947888A (ja) スクランブルテレビシステム