GB493049A - Improvements in or relating to television and like systems - Google Patents
Improvements in or relating to television and like systemsInfo
- Publication number
- GB493049A GB493049A GB898337A GB898337A GB493049A GB 493049 A GB493049 A GB 493049A GB 898337 A GB898337 A GB 898337A GB 898337 A GB898337 A GB 898337A GB 493049 A GB493049 A GB 493049A
- Authority
- GB
- United Kingdom
- Prior art keywords
- framing
- impulses
- impulse
- time
- line
- 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
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/06—Generation of synchronising signals
- H04N5/067—Arrangements or circuits at the transmitter end
- H04N5/073—Arrangements or circuits at the transmitter end for mutually locking plural sources of synchronising signals, e.g. studios or relay stations
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Systems (AREA)
Abstract
493,049. Television. BAIRD TELEVISION, Ltd., WILLANS, P. W., and NUTTALL, T. C. March 30, 1937, No. 8983. [Class 40 (iii)] Consecutive framing impulses, which are in different phase relation to the linesynchronizing impulses for intercalated scanning, are so relatively mistimed that the framing at the receiver occurs correctly. Both sets of synchronizing impulses are of the same amplitude and the framing impulses are separated by a low-pass filter comprising a resistance and a condenser with a time constant of long duration. The residual charge BC on the condenser varies with the time after a line impulse, and thus the initial voltage EF of the framing impulse FG passed by the filter and the time taken to reach the tripping voltage of the framing oscillator also vary. To overcome this, the initiation of the transmission of a framing impulse, which normally would occur at a time #T before a line impulse is delayed by a time #t, where T is the periodicity of the line impulses and t the duration of a line impulse. Specification 455,375 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB898337A GB493049A (en) | 1937-03-30 | 1937-03-30 | Improvements in or relating to television and like systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB898337A GB493049A (en) | 1937-03-30 | 1937-03-30 | Improvements in or relating to television and like systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB493049A true GB493049A (en) | 1938-09-30 |
Family
ID=9863081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB898337A Expired GB493049A (en) | 1937-03-30 | 1937-03-30 | Improvements in or relating to television and like systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB493049A (en) |
-
1937
- 1937-03-30 GB GB898337A patent/GB493049A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2666136A (en) | Frequency synchronizing apparatus | |
| ES387326A1 (en) | Slicing synchronizing pulse separator circuit | |
| GB634372A (en) | Improvements in or relating to pulse modulation signalling systems | |
| GB455858A (en) | Improvements in and relating to the transmission of impulses of different kinds over a common channel, for example in television and like systems | |
| GB788114A (en) | Improvements relating to frequency and phase control systems | |
| US3231829A (en) | Sync lock phase control | |
| GB493049A (en) | Improvements in or relating to television and like systems | |
| GB504460A (en) | Production of synchronising impulses in a television transmitter | |
| GB515302A (en) | Improvements in and relating to television and like systems | |
| US2726282A (en) | Television synchronizing system | |
| GB529790A (en) | Improvements in or relating to synchronising systems for television and the like | |
| GB1243437A (en) | Video signal identification circuit | |
| GB495394A (en) | Improvements in or relating to television or like transmitting installations | |
| US2668872A (en) | Vertical synchronizing system | |
| GB521984A (en) | Improvements in apparatus for receiving television | |
| GB718123A (en) | Synchronizing apparatus, particularly for color television | |
| GB524671A (en) | Improvements in or relating to electric signalling systems | |
| US2892937A (en) | Pulse signal systems | |
| US2668248A (en) | Pulse widening apparatus | |
| GB472762A (en) | Improvements in or relating to television and like systems | |
| GB454539A (en) | Television system | |
| JPS5363807A (en) | Direct current component regenerator of television receiver | |
| AU144439A (en) | Improvements in or relating tothe separation of synchronizing impulses from video signals in television receivers | |
| GB720773A (en) | Improvements in or relating to circuits for synchronising a saw-tooth oscillator | |
| GB972098A (en) | Improvements in or relating to circuit arrangements for synchronizing a local oscillator by means of a phase-discriminator |