Задание для 103 группы на 21.04.2020

TEST VI.

Прочитайте текст, переведите его на русский язык, выполните задания после текста, выскажете своё мнение.

Digital television.

The so-called analogue systems of television are digital systems. Using this new system, Russian experts have managed to encode and compress flows of visual information to the extent that the requirement in the carrying capacity of communication channels has been cut by nearly 86 per cent.

The advantages of digital techniques over analogue electronic systems have demanded that they be used in television. These advantages improve the quality of the picture. While in the analogue system of recording signals noises and errors invariably accumulate at every stage of their transmission or copying, digital recording is almost free of signal errors.

How does digital television work? Basically it performs by splitting the continuous analogue signal into a series of separate pulses. A continuously varying electric signal generated by a usual broadcasting camera is fed into an electronic device which converts it into pulses. These pulses represent binary recordings of the signal`s values at any given moment. At the receiving end of the circuit, the digital signal of binary pulses can be unscrambled back into the analogue signal which is then fed into ordinary TV sets. But the advantages of digital techniques can themselves be used in TV sets in order to improve their reception qualities considerably.

Digital TV, however, has its disadvantages. The main one lies in the tremendous scope of information to be transmitted. And it must be done at the rate of 216 million pulses per second. This great flow of information is rather difficult and extremely expensive to transmit over great distances by technical means available today.

Russian researchers studying this problem have found help in the principles they observed in living nature. And the efforts of Russian researchers in this field are internationally recognized.

1.Прочтите следующие словосочетания и переведите их:

Digital television, analogue system of television, digital system, flows of visual information, communicational channels, video and audio signals, electric signal.

2. Выпишите преимущества и недостатки цифрового телевидения.

3. Найдите и выпишите из текста сказуемые в пассивном залоге, определите время.