GB1151807A - Improvements relating to Colour Television Transmitters. - Google Patents
Improvements relating to Colour Television Transmitters.Info
- Publication number
- GB1151807A GB1151807A GB1929067A GB1929067A GB1151807A GB 1151807 A GB1151807 A GB 1151807A GB 1929067 A GB1929067 A GB 1929067A GB 1929067 A GB1929067 A GB 1929067A GB 1151807 A GB1151807 A GB 1151807A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- channel
- coder
- monochrome
- colour
- 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
- H04N9/43—Conversion of monochrome picture signals to colour picture signals for colour picture display
Abstract
1,151,807. Colour television. BRITISH BROADCASTING CORP. 29 Feb., 1968 [26 April, 1967], No. 19290/67. Heading H4F. To generate a colour television signal from a monochrome television signal, the received monochrome signal is split between at least two channels (e.g. I - V, Fig. 1) of which one (channel I) passes the whole signal as a luminance signal to a colour coder 10, and of which the or each other channel includes an amplitude selective system (e.g. clippers 14, 22, 30, inverters 16, 24, 32, AND gates 26, 34 and blanking stage 18) arranged to pass only those portions of the signal lying within a predetermined amplitude range to means arranged to respond thereto to provide a pre-set chrominance input to the coder, e.g. sets of faders 20, 28, 36 and 38, each set pre-set to give any desired relative values to the signals R, G and B. It is arranged that within each predetermined amplitude range, amplitude variations do not affect the pre-set chrominance input to the coder. The luminance channel (channel I) includes a delay 12 to compensate for the delays introduced by the components in the other channels. An incoming monochrome signal is shown in Fig. 2 (a) with blanking periods 6, the thresholds of clippers 14, 22 and 30 being indicated at 14a, 22a and 30a. The waveforms in Fig. 2 (b) are each labelled with the reference of the block of Fig. 1 which provided the waveform at its output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1929067A GB1151807A (en) | 1967-04-26 | 1967-04-26 | Improvements relating to Colour Television Transmitters. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1929067A GB1151807A (en) | 1967-04-26 | 1967-04-26 | Improvements relating to Colour Television Transmitters. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1151807A true GB1151807A (en) | 1969-05-14 |
Family
ID=10126936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1929067A Expired GB1151807A (en) | 1967-04-26 | 1967-04-26 | Improvements relating to Colour Television Transmitters. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1151807A (en) |
-
1967
- 1967-04-26 GB GB1929067A patent/GB1151807A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |