GB1321749A - Videophone system - Google Patents
Videophone systemInfo
- Publication number
- GB1321749A GB1321749A GB5224971A GB5224971A GB1321749A GB 1321749 A GB1321749 A GB 1321749A GB 5224971 A GB5224971 A GB 5224971A GB 5224971 A GB5224971 A GB 5224971A GB 1321749 A GB1321749 A GB 1321749A
- Authority
- GB
- United Kingdom
- Prior art keywords
- videophone system
- nov
- videophone
- heading
- concerned
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/147—Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/084—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only
- H04N7/085—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only the inserted signal being digital
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
- H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/24—Systems for the transmission of television signals using pulse code modulation
- H04N7/52—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal
- H04N7/54—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal the signals being synchronous
- H04N7/56—Synchronising systems therefor
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Systems (AREA)
- Synchronizing For Television (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
1321749 Television PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 10 Nov 1971 [13 Nov 1970] 52249/71 Heading H4F The subject-matter of this Specification is identical to that of Specification 1,321,750, but the claims are concerned with the arrangement at the videophone receiver for obtaining synchronization.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7016628A NL7016628A (en) | 1970-11-13 | 1970-11-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1321749A true GB1321749A (en) | 1973-06-27 |
Family
ID=19811548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5224971A Expired GB1321749A (en) | 1970-11-13 | 1971-11-10 | Videophone system |
Country Status (11)
Country | Link |
---|---|
JP (1) | JPS5227974B1 (en) |
AU (1) | AU3551771A (en) |
CA (1) | CA940244A (en) |
CH (1) | CH542560A (en) |
DE (1) | DE2152877C3 (en) |
ES (1) | ES396900A1 (en) |
FR (1) | FR2113933B1 (en) |
GB (1) | GB1321749A (en) |
IT (1) | IT942819B (en) |
NL (1) | NL7016628A (en) |
SE (1) | SE365691B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4675722A (en) * | 1982-12-02 | 1987-06-23 | Independent Broadcasting Authority | Apparatus for deriving synchronization signals for component television video signal reception |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2389290A1 (en) * | 1977-04-29 | 1978-11-24 | Briand Marcel | DEVICE FOR TRANSMISSION AND RECEPTION BY ANALOGUE LINES OF VIDEO-PHONE SIGNALS AND DIGITAL SIGNALS |
FR2438401A1 (en) * | 1978-10-05 | 1980-04-30 | Thomson Csf | METHOD FOR TRANSMITTING AN ANALOG AUDIO FREQUENCY SIGNAL DURING TELEVISION SIGNAL SYNCHRONIZATION INTERVALS AND DEVICE FOR CARRYING OUT SAID METHOD |
FR2440669A1 (en) * | 1978-10-31 | 1980-05-30 | Thomson Brandt | SYSTEM FOR BROADCASTING AUDIO-VISUAL TELEVISION SIGNALS SYNCHRONIZED BY A PILOT FREQUENCY AND METHOD FOR IMPLEMENTING SAME |
IL58735A (en) * | 1978-12-04 | 1982-01-31 | Oak Industries Inc | Subscription television coding system |
ATE15311T1 (en) * | 1980-01-22 | 1985-09-15 | Paul Pierre Delogne | METHOD AND SYSTEM FOR TRANSMISSION OF TELEVISION SIGNALS BY MEANS OF DIGITAL CODING OF THESE SIGNALS. |
FR2524242B1 (en) * | 1982-03-24 | 1986-02-07 | Radiotechnique | ENCRYPTION RECOGNITION CIRCUIT FOR TELEVISION BROADCASTING TRANSMISSION SYSTEM AND ENCRYPTED BROADCASTING TRANSMISSION SYSTEM INCLUDING SUCH A CIRCUIT |
FR2524241A1 (en) * | 1982-03-24 | 1983-09-30 | Radiotechnique | Receiver decoding control circuit for TV transmission system - uses phase locked loop and pseudo-random digital sequence generator to provide delay to line sync. signal |
FR2552282B1 (en) * | 1983-09-21 | 1990-07-13 | Veillard Jacques | METHOD AND DEVICE FOR CONSISTENT DEMODULATION OF DIGITALLY MODULATED CARRIER |
-
1970
- 1970-11-13 NL NL7016628A patent/NL7016628A/xx not_active Application Discontinuation
-
1971
- 1971-10-23 DE DE19712152877 patent/DE2152877C3/en not_active Expired
- 1971-11-10 SE SE14358/71A patent/SE365691B/xx unknown
- 1971-11-10 CH CH1633671A patent/CH542560A/en not_active IP Right Cessation
- 1971-11-10 IT IT7068271A patent/IT942819B/en active
- 1971-11-10 AU AU35517/71A patent/AU3551771A/en not_active Expired
- 1971-11-10 GB GB5224971A patent/GB1321749A/en not_active Expired
- 1971-11-11 JP JP8950971A patent/JPS5227974B1/ja active Pending
- 1971-11-11 ES ES396900A patent/ES396900A1/en not_active Expired
- 1971-11-12 FR FR7140504A patent/FR2113933B1/fr not_active Expired
- 1971-11-12 CA CA127,461A patent/CA940244A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4675722A (en) * | 1982-12-02 | 1987-06-23 | Independent Broadcasting Authority | Apparatus for deriving synchronization signals for component television video signal reception |
Also Published As
Publication number | Publication date |
---|---|
JPS5227974B1 (en) | 1977-07-23 |
IT942819B (en) | 1973-04-02 |
AU3551771A (en) | 1973-05-17 |
CA940244A (en) | 1974-01-15 |
DE2152877C3 (en) | 1978-09-14 |
FR2113933A1 (en) | 1972-06-30 |
DE2152877B2 (en) | 1978-01-19 |
FR2113933B1 (en) | 1977-03-18 |
CH542560A (en) | 1973-09-30 |
DE2152877A1 (en) | 1972-05-31 |
SE365691B (en) | 1974-03-25 |
NL7016628A (en) | 1972-05-16 |
ES396900A1 (en) | 1975-05-01 |
AU465455B2 (en) | 1975-09-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
429A | Application made for amendment of specification (sect. 29/1949) | ||
429H | Application (made) for amendment of specification now open to opposition (sect. 29/1949) | ||
429D | Case decided by the comptroller ** specification amended (sect. 29/1949) | ||
PCNP | Patent ceased through non-payment of renewal fee |