ES306483A1 - Improvements relating to colour television - Google Patents
Improvements relating to colour televisionInfo
- Publication number
- ES306483A1 ES306483A1 ES306483DA ES306483A1 ES 306483 A1 ES306483 A1 ES 306483A1 ES 306483D A ES306483D A ES 306483DA ES 306483 A1 ES306483 A1 ES 306483A1
- Authority
- ES
- Spain
- Prior art keywords
- bursts
- signal
- line
- stage
- separated
- 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
- H04N9/00—Details of colour television systems
- H04N9/44—Colour synchronisation
- H04N9/455—Generation of colour burst signals; Insertion of colour burst signals in colour picture signals or separation of colour burst signals from colour picture signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
In a PAL colour television receiver. Fig. 4, in which the subcarrier I and Q components are separated by means of an arrangement comprising a one-line duration delay line 3, a 180 degree phase shifter 15 and adding stages 4-16, the constant phase sub-carrier synchronizing " bursts " cancel at the output of stage 16 but add at the output of stage 4 to produce " bursts " 7 of double amplitude, each formed by the addition of two consecutive input pulses. The noise cancelling characteristics of the system are discussed with reference to Fig. 2 (not shown). The " bursts " are separated from the Q signal by gate 5 and applied to synchronize sub-carrier oscillator 9 from which suitably phased signals pass to the I and Q demodulators 24 and 20. The I and Q signals are also applied to full-wave rectifier circuits 28 and 27, with the rectifiers in one circuit reversed with respect to those in the other, to derive a signal of fixed phase at twice subcarrier frequency which is applied to synchronize oscillator 9 throughout the forward strokes of the scanning lines as described in Specification 1,070,193. The polarity reversal of the I signal may be removed by the inclusion of 180 degree phase shifter in line 23 or 25 which is switched in and out at line rate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET25202A DE1194447B (en) | 1963-12-06 | 1963-12-06 | Color television receiver |
| DE1964T0025813 DE1260520B (en) | 1963-12-06 | 1964-03-13 | Color television system with color sync signals for generating a reference carrier and line-frequency switching in the receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES306483A1 true ES306483A1 (en) | 1965-04-16 |
Family
ID=25999803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES306483D Expired ES306483A1 (en) | 1963-12-06 | 1964-11-27 | Improvements relating to colour television |
Country Status (9)
| Country | Link |
|---|---|
| AT (2) | AT247435B (en) |
| AU (2) | AU287601B2 (en) |
| BE (1) | BE656631A (en) |
| DD (1) | DD44179B1 (en) |
| DE (2) | DE1194447B (en) |
| ES (1) | ES306483A1 (en) |
| FR (1) | FR1415318A (en) |
| GB (2) | GB1092454A (en) |
| NZ (2) | NZ140058A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1290177B (en) * | 1965-09-15 | 1969-03-06 | Standard Elektrik Lorenz Ag | Color television receiver circuit for setting the color saturation of a PAL signal |
| GB1166632A (en) * | 1965-12-21 | 1969-10-08 | Communications Patents Ltd | Improved Wired Broadcasting Systems and Apparatus Therefor |
| NZ150889A (en) * | 1966-12-03 | |||
| GB1533148A (en) * | 1975-06-20 | 1978-11-22 | Indesit | Reception-transmission system for radio-electrical signal |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2735886A (en) * | 1956-02-21 | Color television system | ||
| US2416424A (en) * | 1939-03-16 | 1947-02-25 | Hazeltine Research Inc | Synchronizing-signal separator |
| LU31205A1 (en) * | 1951-01-22 | |||
| US2754356A (en) * | 1952-04-24 | 1956-07-10 | Hazeltine Research Inc | Control systems for color-television receivers |
-
0
- NZ NZ140979D patent/NZ140979A/xx unknown
- NZ NZ140058D patent/NZ140058A/xx unknown
-
1963
- 1963-12-06 DE DET25202A patent/DE1194447B/en active Pending
-
1964
- 1964-03-13 DE DE1964T0025813 patent/DE1260520B/en active Pending
- 1964-11-02 DD DD10737364A patent/DD44179B1/en unknown
- 1964-11-03 AT AT931564A patent/AT247435B/en active
- 1964-11-03 AT AT680365A patent/AT255508B/en active
- 1964-11-20 AU AU51930/64A patent/AU287601B2/en not_active Expired
- 1964-11-26 GB GB4803764A patent/GB1092454A/en not_active Expired
- 1964-11-26 GB GB3211467A patent/GB1092455A/en not_active Expired
- 1964-11-27 ES ES306483D patent/ES306483A1/en not_active Expired
- 1964-12-01 FR FR996912A patent/FR1415318A/en not_active Expired
- 1964-12-04 BE BE656631D patent/BE656631A/xx unknown
-
1965
- 1965-03-05 AU AU56005/65A patent/AU292616B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AU5600565A (en) | 1966-09-08 |
| GB1092455A (en) | 1967-11-22 |
| GB1092454A (en) | 1967-11-22 |
| NZ140058A (en) | |
| AT255508B (en) | 1967-07-10 |
| AU287601B2 (en) | 1968-12-10 |
| NZ140979A (en) | |
| AU5193064A (en) | 1966-05-26 |
| FR1415318A (en) | 1965-10-22 |
| DD44179B1 (en) | 1982-03-10 |
| AU292616B2 (en) | 1969-07-17 |
| AT247435B (en) | 1966-06-10 |
| DE1194447B (en) | 1965-06-10 |
| DE1260520B (en) | 1968-02-08 |
| BE656631A (en) | 1965-04-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD1A | Patent lapsed |
Effective date: 19850223 |