5211 Kazan National Research Technical University gr. - презентация

1 5211 Kazan National Research Technical University gr.

2

3

4 ln its early stages of development, television included only those devices employing a combination of optical, mechanical and electronic technologies to capture, transmit and display a visual image.

5 In 1884 Paul G. Nipkow, a 20-year old university student in Germany invented the first electromechanical television system which employed a scanning disk, a spinning disk with a series of holes spiraling toward the center, for rasterization.

6 The holes were spaced at equal angular intervals such that in a single rotation the disk would allow light to pass through each hole and onto a light-sensitive selenium sensor which produced the electrical pulses. As an image was focused on the rotating disk, each hole captured a horizontal "slice" of the whole image.

7

8 20 century 19 century 21 century Invented the first electromechanical television system in 1884 of Paul G. Nipkow Karl Braun in 1927 invented televisions depended also upon the cathode-ray tube. Liquidly - the Crystal(LC) TV

9

10 15 Words to TELEVISION AND TELECOMMUNICATION: Widely – широко; Medium – среда; Sending - послать; Broadcasting – телерадиовещание, транслировать; Either - любой, один из двух; Modem - интерфейс конечного пользователя компьютера, позволяющий выполнять передачу цифровых данных с помощью аналоговых систем, например, телефонных линий; Gained – полученное; Employed - использованный; Spinning – вращение; Holes – дыры; Toward - послушный; благонравный; предстоящий; по направлению к; Rasterization – растеризация; Spaced - расположенными; Rotation – чередование; Focused - сосредоточеный.