CA1131762A - Systeme de codage-decodage d'emissions telediffusees destinees a des abonnes - Google Patents

Systeme de codage-decodage d'emissions telediffusees destinees a des abonnes

Info

Publication number: CA1131762A
Authority: CA; Canada
Prior art keywords: signals; unscrambling; video; bit; scrambling
Prior art date: 1977-10-19
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

CA313,330A

Other languages

English (en)

Inventor

Richard A. Davidson

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.)

FEATURE FILM SERVICES

Original Assignee

FEATURE FILM SERVICES

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.)

1977-10-19

Filing date

1978-10-13

Publication date

1982-09-14

1978-10-13 Application filed by FEATURE FILM SERVICES filed Critical FEATURE FILM SERVICES

1982-09-14 Application granted granted Critical

1982-09-14 Publication of CA1131762A publication Critical patent/CA1131762A/fr

Status Expired legal-status Critical Current

Links

230000005236 sound signal Effects 0.000 claims abstract description 78
238000000034 method Methods 0.000 claims abstract description 55
230000015556 catabolic process Effects 0.000 claims abstract description 9
238000006731 degradation reaction Methods 0.000 claims abstract description 9
238000006243 chemical reaction Methods 0.000 claims abstract description 6
230000006854 communication Effects 0.000 claims description 25
238000004891 communication Methods 0.000 claims description 24
230000005540 biological transmission Effects 0.000 claims description 7
238000001514 detection method Methods 0.000 claims description 5
238000010586 diagram Methods 0.000 description 19
238000012546 transfer Methods 0.000 description 8
230000000007 visual effect Effects 0.000 description 6
230000001276 controlling effect Effects 0.000 description 5
230000001934 delay Effects 0.000 description 3
230000001419 dependent effect Effects 0.000 description 3
230000000881 depressing effect Effects 0.000 description 3
230000000994 depressogenic effect Effects 0.000 description 3
238000012986 modification Methods 0.000 description 3
230000004048 modification Effects 0.000 description 3
230000001360 synchronised effect Effects 0.000 description 3
230000003321 amplification Effects 0.000 description 2
230000000295 complement effect Effects 0.000 description 2
239000002131 composite material Substances 0.000 description 2
238000003199 nucleic acid amplification method Methods 0.000 description 2
238000009877 rendering Methods 0.000 description 2
230000003595 spectral effect Effects 0.000 description 2
230000003213 activating effect Effects 0.000 description 1
239000003990 capacitor Substances 0.000 description 1
238000010894 electron beam technology Methods 0.000 description 1
239000000284 extract Substances 0.000 description 1
238000005286 illumination Methods 0.000 description 1
238000009434 installation Methods 0.000 description 1
239000000463 material Substances 0.000 description 1
230000000737 periodic effect Effects 0.000 description 1
238000012545 processing Methods 0.000 description 1
238000012958 reprocessing Methods 0.000 description 1

Landscapes

Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

CA313,330A 1977-10-19 1978-10-13 Systeme de codage-decodage d'emissions telediffusees destinees a des abonnes Expired CA1131762A (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US84374077A	1977-10-19	1977-10-19
US843,740		1977-10-19

Publications (1)

Publication Number	Publication Date
CA1131762A true CA1131762A (fr)	1982-09-14

Family

ID=25290886

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA313,330A Expired CA1131762A (fr)	1977-10-19	1978-10-13	Systeme de codage-decodage d'emissions telediffusees destinees a des abonnes

Country Status (3)

Country	Link
JP (1)	JPS5477514A (fr)
AU (1)	AU523710B2 (fr)
CA (1)	CA1131762A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4734764A (en) *	1985-04-29	1988-03-29	Cableshare, Inc.	Cable television system selectively distributing pre-recorded video and audio messages

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0049280B1 (fr) *	1980-03-31	1990-10-31	General Instrument Corporation	Arrangement de communication par television pour transmettre des signaux de donnees
JPS56160224A (en) *	1980-04-14	1981-12-09	Jsj Corp	Bull type lockout actuator for transmission shifter
JPS57131184A (en) *	1981-02-05	1982-08-13	Alps Electric Co Ltd	Pay telecasting system
JPS57168586A (en) *	1981-03-10	1982-10-16	Alps Electric Co Ltd	Data processing circuit of charged television broadcast
JPS57164682A (en) *	1981-04-02	1982-10-09	Alps Electric Co Ltd	Data processing circuit
US5508815A (en) *	1981-12-14	1996-04-16	Smart Vcr Limited Partnership	Schedule display system for video recorder programming
JPS58131874A (ja) *	1982-01-30	1983-08-05	Sony Corp	テレビジヨン信号伝送システム
JPS58151788A (ja) *	1982-03-05	1983-09-09	Alps Electric Co Ltd	スクランブル／デイスクランブル・システム
JPS58151787A (ja) *	1982-03-05	1983-09-09	Alps Electric Co Ltd	スクランブル／デイスクランブル方式
AU568314B2 (en) *	1982-10-08	1987-12-24	Camview Pty. Ltd.	Frequency conversion subscription television system
GB8605014D0 (en) *	1986-02-28	1986-10-01	Int Computers Ltd	Video display unit

1978
- 1978-10-13 CA CA313,330A patent/CA1131762A/fr not_active Expired
- 1978-10-19 JP JP12903378A patent/JPS5477514A/ja active Pending
- 1978-10-26 AU AU41087/78A patent/AU523710B2/en not_active Expired

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4734764A (en) *	1985-04-29	1988-03-29	Cableshare, Inc.	Cable television system selectively distributing pre-recorded video and audio messages

Also Published As

Publication number	Publication date
AU523710B2 (en)	1982-08-12
JPS5477514A (en)	1979-06-21
AU4108778A (en)	1980-05-01

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Legal Events

Date	Code	Title	Description
1999-09-14	MKEX	Expiry
2022-09-10	MKEX	Expiry	Effective date: 19990914