DE3378247D1 - Apparatus for scrambling a television signal - Google Patents

Apparatus for scrambling a television signal

Info

Publication number
DE3378247D1
DE3378247D1 DE8383304084T DE3378247T DE3378247D1 DE 3378247 D1 DE3378247 D1 DE 3378247D1 DE 8383304084 T DE8383304084 T DE 8383304084T DE 3378247 T DE3378247 T DE 3378247T DE 3378247 D1 DE3378247 D1 DE 3378247D1
Authority
DE
Germany
Prior art keywords
pattern
signal
period
scrambling
television signal
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
DE8383304084T
Other languages
English (en)
Inventor
Takashi Okada
Takao Nogi
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of DE3378247D1 publication Critical patent/DE3378247D1/de
Expired 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
    • H04N7/1716—Systems operating in the amplitude domain of the television signal by inverting the polarity of active picture signal portions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/142—Detection of scene cut or scene change
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/179—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a scene or a shot
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
    • H04N19/87—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving scene cut or scene change detection in combination with video compression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/147—Scene change detection
    • 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
DE8383304084T 1983-07-13 1983-07-13 Apparatus for scrambling a television signal Expired DE3378247D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83304084A EP0131663B1 (de) 1983-07-13 1983-07-13 Fernsehsignalverschleierungsgerät

Publications (1)

Publication Number Publication Date
DE3378247D1 true DE3378247D1 (en) 1988-11-17

Family

ID=8191217

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383304084T Expired DE3378247D1 (en) 1983-07-13 1983-07-13 Apparatus for scrambling a television signal

Country Status (5)

Country Link
US (1) US4700388A (de)
EP (1) EP0131663B1 (de)
AU (1) AU567879B2 (de)
CA (1) CA1213972A (de)
DE (1) DE3378247D1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6016083A (ja) * 1983-07-07 1985-01-26 Sony Corp テレビジヨン信号伝送システム
JPS6016082A (ja) * 1983-07-07 1985-01-26 Sony Corp スクランブルテレビジヨン信号の伝送方式
GB2180127B (en) * 1985-09-04 1989-08-23 Philips Electronic Associated Method of data communication
WO1987004034A1 (en) * 1985-12-24 1987-07-02 British Broadcasting Corporation Bandwidth compression for television signals
GB2185664B (en) * 1986-01-17 1989-10-25 Philips Electronic Associated Teletext transmission systems
FR2621204B1 (fr) * 1987-09-24 1994-07-01 Aeta Procede et dispositif de cryptage/decryptage analogique d'un signal video analogique
US5003590A (en) * 1989-12-18 1991-03-26 Eidak Corporation Encoding an optical video disc to inhibit video tape recording
US5091938B1 (en) * 1990-08-06 1997-02-04 Nippon Denki Home Electronics Digital data cryptographic system
US5546461A (en) * 1993-04-09 1996-08-13 Matsushita Electric Industrial Co., Ltd. Scramble system for use in digital video signal recording and reproducing system or transmission and receiving system, comprising scramble apparatus and descramble apparatus
US5617149A (en) * 1994-11-22 1997-04-01 Electronics And Telecommunications Research Institute Apparatus and method for detecting scene changes using the difference of mad between image frames
JP3692838B2 (ja) * 1999-06-22 2005-09-07 日本ビクター株式会社 記録方法、再生方法、再生装置及び記録媒体
US20070180130A1 (en) * 2006-02-01 2007-08-02 Arnold William C Method and apparatus for multi-protocol digital communications

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB841627A (en) * 1956-12-20 1960-07-20 Rank Organisation Ltd Improvements in or relating to television systems
CH540613A (de) * 1970-12-08 1973-08-15 Gretag Ag Verfahren und Vorrichtung zur chiffrierten Nachrichtenübermittlung
US4075660A (en) * 1972-02-18 1978-02-21 Teleglobe Pay-Tv System, Inc. Pay television system with synchronization suppression
US3919462A (en) * 1973-08-15 1975-11-11 System Dev Corp Method and apparatus for scrambling and unscrambling communication signals
US4340906A (en) * 1980-05-14 1982-07-20 Oak Industries Inc. Video signal coding by video signal polarity reversal on the basis of brightness level comparison
AU562395B2 (en) * 1981-09-10 1987-06-11 Sony Corporation Subscription television system
US4454543A (en) * 1981-11-06 1984-06-12 Oak Industries Inc. Dynamic video scrambling
US4484027A (en) * 1981-11-19 1984-11-20 Communications Satellite Corporation Security system for SSTV encryption
US4514761A (en) * 1982-08-23 1985-04-30 Zenith Electronics Corporation Data encryption technique for subscription television system

Also Published As

Publication number Publication date
CA1213972A (en) 1986-11-12
US4700388A (en) 1987-10-13
AU1687483A (en) 1985-01-17
EP0131663B1 (de) 1988-10-12
AU567879B2 (en) 1987-12-10
EP0131663A1 (de) 1985-01-23

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee