SU149806A1 - A device for producing combined television images by electronic keying - Google Patents

A device for producing combined television images by electronic keying

Info

Publication number
SU149806A1
SU149806A1 SU751735A SU751735A SU149806A1 SU 149806 A1 SU149806 A1 SU 149806A1 SU 751735 A SU751735 A SU 751735A SU 751735 A SU751735 A SU 751735A SU 149806 A1 SU149806 A1 SU 149806A1
Authority
SU
USSR - Soviet Union
Prior art keywords
television images
pulses
combined television
electronic keying
producing combined
Prior art date
Application number
SU751735A
Other languages
Russian (ru)
Inventor
А.Н. Дроханов
С.И. Катаев
Original Assignee
А.Н. Дроханов
С.И. Катаев
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by А.Н. Дроханов, С.И. Катаев filed Critical А.Н. Дроханов
Priority to SU751735A priority Critical patent/SU149806A1/en
Application granted granted Critical
Publication of SU149806A1 publication Critical patent/SU149806A1/en

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Description

Известные устройства дл  получени  комбинированных телевизи онных изображений методом электронной рирпроекции с поочередной коммутацией каналов актёра и фона коммутатором, управл емым силуэтным сигналом, сложны в эксплуатации, так как требуют применени  рирэкрана сравнительно большого размера.The known devices for obtaining combined television images by electronic keying with alternate switching of the actor and background channels by a switch controlled by a silhouette signal are difficult to operate, as they require the use of a relatively large screen screen.

В предлагаемом устройстве дл  уменьшени  размеров экрана, перед которым находитс  актер, к блоку формировани  силуэтного сигнала подключен сумматор гас ших синхроимпульсов и вспомогательных им.пульсов строчной частоты и частоты полей, выход которого через ограничитель соединен с электронным комМутатором.In the proposed device for reducing the size of the screen, in front of which the actor is located, an adder for the dead sync pulses and auxiliary names of horizontal frequency and field frequencies is connected to the silhouette signal shaping unit, the output of which is connected to an electronic switch through a limiter.

На чертеже приведена блок-схема описываемого устройства.The drawing shows the block diagram of the described device.

Формирование силуэтного сигнала осуш,ествл ют с помош,ью генератора /, создаюшего строчные импульсы, и генератора 2, вырабатывающего импульсы С частотой полей. Оба генератора синхронизированы с основным синхрогенератором развертки телевизионного изображени . Строчные импульсы и импульсы частоты полей, полученные от вспомогательных генераторов 1, 2, смешиваютс  в блоке 3 и вместе с гас щими импульса-ми, вырабатываемыми блоком 4, подаютс  в канал формировани  силуэтного сигнала. Вспомогательные имлульсы, полученные от генераторов 1, 2, регулируемые по фазе и скважности , исправл ют силуэтный сигнал, искаженный вследствие того, что поле зрени  передающей камеры превышает размеры белого экрана в канале 5 актера. Блоки 3, 4 периодически запирают канал, подвод щий импульсы от генераторов 1, 2 к сумматору 6. Дл  уменьшени  размеров экрана, -перед которым находитс  актер, к блоку 7 силуэтного сигнала подключен сумматор 6 гас щи.х синхроимпульсов и вспомогательных импульсов. Полученный сигнал с выхода сумматора 6The formation of the silhouette signal is dried out with the help of a generator /, which generates line pulses, and a generator 2, which generates pulses With a frequency of fields. Both generators are synchronized with the main sync generator of the television image sweep. Horizontal pulses and frequency field pulses received from auxiliary generators 1, 2 are mixed in block 3 and, together with damping pulses produced by block 4, are fed into the silhouette signal shaping channel. Auxiliary impulses received from generators 1, 2, adjustable in phase and duty cycle, correct the silhouette signal, distorted due to the fact that the field of view of the transmitting chamber exceeds the dimensions of the white screen in channel 5 of the actor. Blocks 3, 4 periodically block the channel that supplies pulses from generators 1, 2 to adder 6. To reduce the size of the screen, in front of which the actor is located, adder 6 of the sync pulses and auxiliary pulses is connected to block 7 of the silhouette signal. The received signal from the output of the adder 6

через ограничитель подводитс  к коммутатору 9 канала 10 фона и канала 5 актера.through the limiter is supplied to the switch 9 of the background channel 10 and the actor channel 5.

Описанное устройство дл  получени  комбинированных телевизионных изображений методом электронной рирнроекции дает возможность использовать рирэкран меньших размеров, чем все поле изображени ; формируемое передающей камерой.The described device for obtaining combined television images by the method of electronic directionalization makes it possible to use a rear screen smaller than the entire image field; formed by the transmitting camera.

.(.предмет изобретени . (. subject of invention

Устройство дл  получени  комбинированных телевизионных- изображений методом электронной рирпроекции с поочередной коммутацией каналов актера и фона коммутатором, управл емым силуэтным сигналом, отличающеес  тем, что, с целью уменьшепи  размеров экрана, перед которым находитс  актёр, к блоку формировани  силуэтного сигнала подключен сумматор гас щих синхроимпульсов и вспомогательных импульсов строчной частоты и частоты полей (исправл ющих силуэтный сигнал), выход которого через ограничитель соединен с электронным коммутатором, производ щим переключение каналов актера и фона.A device for receiving combined television images by electronic keying with alternate switching of the actor and background channels by a switch controlled by a silhouette signal, characterized in that, in order to reduce the screen size, in front of which the actor is located, an adder of damping clock pulses and auxiliary pulses of the horizontal frequency and the frequency of the fields (correcting the silhouette signal), the output of which is connected to the electronic switch through the limiter, oizvod conductive actor switching channels and background.

,0J К линейно ну усилителю, 0J K linear well by amplifier

ра5очегоwhat does

каналаchannel

SU751735A 1961-11-14 1961-11-14 A device for producing combined television images by electronic keying SU149806A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU751735A SU149806A1 (en) 1961-11-14 1961-11-14 A device for producing combined television images by electronic keying

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU751735A SU149806A1 (en) 1961-11-14 1961-11-14 A device for producing combined television images by electronic keying

Publications (1)

Publication Number Publication Date
SU149806A1 true SU149806A1 (en) 1961-11-30

Family

ID=48304866

Family Applications (1)

Application Number Title Priority Date Filing Date
SU751735A SU149806A1 (en) 1961-11-14 1961-11-14 A device for producing combined television images by electronic keying

Country Status (1)

Country Link
SU (1) SU149806A1 (en)

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