SU123200A1 - A method of separating color signals from a single black and white television tube for transmitting color television - Google Patents
A method of separating color signals from a single black and white television tube for transmitting color televisionInfo
- Publication number
- SU123200A1 SU123200A1 SU572642A SU572642A SU123200A1 SU 123200 A1 SU123200 A1 SU 123200A1 SU 572642 A SU572642 A SU 572642A SU 572642 A SU572642 A SU 572642A SU 123200 A1 SU123200 A1 SU 123200A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- television
- color
- tube
- transmitting
- single black
- Prior art date
Links
- 238000000034 method Methods 0.000 title description 5
- 238000005286 illumination Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- KPHWPUGNDIVLNH-UHFFFAOYSA-M diclofenac sodium Chemical compound [Na+].[O-]C(=O)CC1=CC=CC=C1NC1=C(Cl)C=CC=C1Cl KPHWPUGNDIVLNH-UHFFFAOYSA-M 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Color Television Image Signal Generators (AREA)
Description
Известен способ разделени цветовых сигналов от одной черно-белой телевизионной трубки при передаче цветного телевизионного изобрал-сени , состо щий в том, что дл получени сигналов цветной информации используетс одна передающа трубка, перед фотокатодом которой расположен растровый светофильтр, состо щий из чередующихс полосок красного, синего, зеленого и прозрачного светофильтров.A known method for separating color signals from a single black and white television tube when transmitting a color television image is that a single transmitting tube is used to receive color information signals, in front of the photocathode of which there is a raster filter consisting of alternating red stripes blue, green and transparent light filters.
Недостатки подобного способа заключаютс в сложности конструкции передающей трубки, котора должна иметь высокую чувствительность при малом уровне шума, и в необходимости применени громоздких коммутаторов, служащих дл разделени сигналов, направл емых в красный и синий каналы.The disadvantages of this method are the complexity of the design of the transmitting tube, which must have a high sensitivity with a low noise level, and the need to use bulky switches used to separate the signals sent to the red and blue channels.
В описываемом способе эти недостатки устранены тем, что дл разделени сигналов, направл емых в красный и синий каналы, сигналы изображени различных цветовых компонент складывают с сигналами, полученными при дополнительной подсветке фотокатода трубки.In the described method, these disadvantages are eliminated by the fact that, in order to separate the signals sent to the red and blue channels, the image signals of different color components are added to the signals obtained with additional illumination of the photocathode of the tube.
В двух раздельных каналах сигнал от красного пол ограничиваетс по максимуму, а от синего - по минимуму.In two separate channels, the signal from the red field is limited to the maximum, and from the blue to the minimum.
Дл формировани каждого из сигналов примен ют задержку сигнала на половину периода с последующим сложением с незадержанным сигналом данной цветовой составл ющей.For the formation of each of the signals, a signal delay of half a period is applied, followed by addition with a non-delayed signal of a given color component.
Блок-схема устройства, по сн юща описываемый способ, приведена на чертеже.The block diagram of the device, explaining the described method, is shown in the drawing.
Перед фотокатодом передающей трубки, не показанной на чертеже, полагают растровый светофильтр, состо щий из чередующихс полос красного и синего светофильтров.Before the photocathode of the transmitting tube, not shown in the drawing, a raster filter consisting of alternating bands of red and blue light filters is assumed.
Фотокатод трубки освещаетс равномерным потоком синего цвета дл создани посто нной подсветки, вследствие чего в выходной сигнал составл ющей синего цвета вводитс посто нна составл юща в форме пр моугольных импульсов, число которых за врем передачи одной строки равно числу полос синего цвета на растровом светофильтре.The photocathode of the tube is illuminated with a uniform stream of blue color to create a constant illumination, as a result of which a constant component in the form of rectangular pulses, the number of which during the transmission of one line is equal to the number of blue stripes on the raster filter, is introduced into the output signal of the blue component.
На фотокатод передающей трубки проектируетс изображение сцены , состо щее из красной и синей компонент цветов (зелена компонента отражаетс дихроническим зеркалом на трубку, выдающую ркостный сигнал).On the photocathode of the transmitting tube, an image of the scene is projected consisting of the red and blue components of the colors (the green component is reflected by a dichronic mirror onto the tube producing a luminous signal).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU572642A SU123200A1 (en) | 1957-05-09 | 1957-05-09 | A method of separating color signals from a single black and white television tube for transmitting color television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU572642A SU123200A1 (en) | 1957-05-09 | 1957-05-09 | A method of separating color signals from a single black and white television tube for transmitting color television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU123200A1 true SU123200A1 (en) | 1958-11-30 |
Family
ID=48394782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU572642A SU123200A1 (en) | 1957-05-09 | 1957-05-09 | A method of separating color signals from a single black and white television tube for transmitting color television |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU123200A1 (en) |
-
1957
- 1957-05-09 SU SU572642A patent/SU123200A1/en active
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