IE55744B1 - Audio scrambler utilizing an auxiliary channel for synchronizing the descrambler - Google Patents

Audio scrambler utilizing an auxiliary channel for synchronizing the descrambler

Info

Publication number: IE55744B1
Authority: IE; Ireland
Prior art keywords: audio signal; digital; signal; scrambled; audio
Prior art date: 1982-04-08

Application number

IE56583A

Other languages

English (en)

Other versions

IE830565L (en

Original Assignee

Westinghouse Electric 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.)

1982-04-08

Filing date

1983-03-16

Publication date

1991-01-02

1983-03-16 Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp

1983-10-08 Publication of IE830565L publication Critical patent/IE830565L/en

1991-01-02 Publication of IE55744B1 publication Critical patent/IE55744B1/en

Links

230000005540 biological transmission Effects 0.000 claims abstract description 16
230000005236 sound signal Effects 0.000 claims description 58
238000000034 method Methods 0.000 claims description 19
238000005070 sampling Methods 0.000 claims description 10
230000008878 coupling Effects 0.000 claims description 5
238000010168 coupling process Methods 0.000 claims description 5
238000005859 coupling reaction Methods 0.000 claims description 5
230000001934 delay Effects 0.000 claims description 3
238000010586 diagram Methods 0.000 description 6
230000001360 synchronised effect Effects 0.000 description 6
239000002131 composite material Substances 0.000 description 5
238000000926 separation method Methods 0.000 description 3
101100168115 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) con-6 gene Proteins 0.000 description 1
238000010420 art technique Methods 0.000 description 1
238000004891 communication Methods 0.000 description 1
238000007796 conventional method Methods 0.000 description 1
230000008707 rearrangement Effects 0.000 description 1

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
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible
- 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
- H04N7/169—Systems operating in the time domain of the television signal
- H04N7/1696—Systems operating in the time domain of the television signal by changing or reversing the order of active picture signal portions

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Multimedia (AREA)
Computer Networks & Wireless Communication (AREA)
Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Synchronisation In Digital Transmission Systems (AREA)

IE56583A 1982-04-08 1983-03-16 Audio scrambler utilizing an auxiliary channel for synchronizing the descrambler IE55744B1 (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US36662482A	1982-04-08	1982-04-08

Publications (2)

Publication Number	Publication Date
IE830565L IE830565L (en)	1983-10-08
IE55744B1 true IE55744B1 (en)	1991-01-02

Family

ID=23443804

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IE56583A IE55744B1 (en)	1982-04-08	1983-03-16	Audio scrambler utilizing an auxiliary channel for synchronizing the descrambler

Country Status (4)

Country	Link
EP (1)	EP0105906A1 (de)
CA (1)	CA1204162A (de)
IE (1)	IE55744B1 (de)
WO (1)	WO1983003731A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2140656A (en) *	1983-05-13	1984-11-28	Philips Electronic Associated	Television transmission system
DE3343307A1 (de) *	1983-11-30	1985-06-05	Blaupunkt-Werke Gmbh, 3200 Hildesheim	Verfahren zum verschluesseln und entschluesseln von analogen signalen, sowie schaltungsanordnung zur durchfuehrung des verfahrens
US4599646A (en) *	1984-05-18	1986-07-08	D-Tec Industries, Inc.	Method and apparatus for identifying unauthorized or defective converter/decoder boxes in CATV system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3746799A (en) *	1971-09-27	1973-07-17	Us Navy	Method and apparatus for encoding and decoding analog signals
US4086435A (en) *	1976-09-17	1978-04-25	Biosystems Research Group Ii	Method of and means for scrambling and descrambling speech at audio frequencies
US4221931A (en) *	1977-10-17	1980-09-09	Harris Corporation	Time division multiplied speech scrambler
US4215366A (en) *	1977-10-19	1980-07-29	Feature Film Services	Subscriber-limited reception television broadcast security encoder-decoder system
US4318125A (en) *	1979-04-25	1982-03-02	Westinghouse Electric Corp.	Solid state digital audio scrambler system for teletransmission of audio intelligence through a television system
US4295223A (en) *	1979-04-25	1981-10-13	Westinghouse Electric Corp.	Digital signal/noise ratio amplifier apparatus for a communication system

1983
- 1983-03-16 IE IE56583A patent/IE55744B1/en unknown
- 1983-03-23 WO PCT/US1983/000408 patent/WO1983003731A1/en not_active Ceased
- 1983-03-23 EP EP19830901503 patent/EP0105906A1/de not_active Withdrawn
- 1983-03-30 CA CA000424946A patent/CA1204162A/en not_active Expired

Also Published As

Publication number	Publication date
EP0105906A1 (de)	1984-04-25
CA1204162A (en)	1986-05-06
IE830565L (en)	1983-10-08
WO1983003731A1 (en)	1983-10-27

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