GB1508402A - Colour television systems - Google Patents
Colour television systemsInfo
- Publication number
- GB1508402A GB1508402A GB2362176A GB2362176A GB1508402A GB 1508402 A GB1508402 A GB 1508402A GB 2362176 A GB2362176 A GB 2362176A GB 2362176 A GB2362176 A GB 2362176A GB 1508402 A GB1508402 A GB 1508402A
- Authority
- GB
- United Kingdom
- Prior art keywords
- outputs
- pair
- demodulators
- colour
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
- H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
- H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
- H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
- H04N11/16—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system
- H04N11/165—Decoding means therefor
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
1508402 Television INDESIT INDUSTRIA ELETTRODOMESTICI ITALIANA SpA 8 June 1976 [12 June 1975] 23621/76 Heading H4F A PAL type decoder comprises a pair of demodulators 4 and 5 receiving the chrominance signal of a television transmission and one or the other of a pair of antiphased reference oscillations from a pair of controlled oscillators 7 and 8 each fed with alternate bursts of reference colour subcarrier in the transmitted signal via switches 3 and 6. The demodulator reference oscillations are switched in alternation at the line frequency switches 15 and 16 operating simultaneously with burst distributer switch 6. Each demodulator has a pair of outputs (+, -) from which signals dependent on the colour difference signals (M and V) continuously emanate (i.e. there is no line frequency switching between outputs) due to the alternating reference oscillations applied to the demodulators. These outputs are matrixed 17 to 29 with the luminance component Y to derive the colour signal outputs R, G and B. As a result of this arrangement the same outputs from demodulators 4 and 5 are obtained regardless of the relationship between the switching cycle of distributer switch 6 and the burst phase swing cycle of the received signal. The burst phase angle oscillates between values Œ30 degrees or Œ150 degrees disposed symmetrically about the stationary chrominance component U.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT6851275A IT1036280B (en) | 1975-06-12 | 1975-06-12 | IMPROVEMENTS TO COLOR TELEVISION SYSTEMS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1508402A true GB1508402A (en) | 1978-04-26 |
Family
ID=11309654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2362176A Expired GB1508402A (en) | 1975-06-12 | 1976-06-08 | Colour television systems |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2626231A1 (en) |
| GB (1) | GB1508402A (en) |
| IT (1) | IT1036280B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2965200D1 (en) * | 1978-09-23 | 1983-05-19 | Licentia Gmbh | Colour decoder for a pal- or secam- colour television receiver |
-
1975
- 1975-06-12 IT IT6851275A patent/IT1036280B/en active
-
1976
- 1976-06-08 GB GB2362176A patent/GB1508402A/en not_active Expired
- 1976-06-11 DE DE19762626231 patent/DE2626231A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| IT1036280B (en) | 1979-10-30 |
| DE2626231A1 (en) | 1977-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1508402A (en) | Colour television systems | |
| GB1390075A (en) | Colour television display apparatus | |
| GB1358551A (en) | Demodulation system | |
| GB1323434A (en) | Dropout compensator for pal colour television | |
| GB1337656A (en) | Decoding system for a colour television receiver | |
| ES372162A1 (en) | Identification circuit for pal color television receiver | |
| GB1336920A (en) | Decoding systems for colour television receivers | |
| JPS5730486A (en) | Chrominance demodulator | |
| GB1335838A (en) | Colour television receiver | |
| JPS55140384A (en) | Color demodulating circuit | |
| GB1514411A (en) | Colour television signal demodulator circuit | |
| GB1385795A (en) | Colour television receiver for use in pal system | |
| GB1391549A (en) | Colour tv receivers | |
| JPS56141682A (en) | Color demodulation equipment | |
| GB1360522A (en) | Circuit for demodulating a colour difference signal in the pal system colour television signal | |
| GB1401678A (en) | Decoding systems for colour television receivers | |
| JPS5748887A (en) | Chroma demodulator | |
| GB1390081A (en) | Colour television receiver | |
| GB1490205A (en) | Colour television decoder | |
| GB1342497A (en) | Demodulating systems for colour television receivers | |
| GB1521295A (en) | Circuit arrangement for demodulating chrominance television signals | |
| GB1077946A (en) | Improvements in and relating to special effects apparatus for television | |
| GB1109187A (en) | Improvements in subcarrier circuits for colour television apparatus | |
| GB1141752A (en) | Colour television transmitting apparatus | |
| GB1531248A (en) | Demodulator circuit for colour television signals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |