I. Reading Exercises:

Exercise 1. Read and memorize using a dictionary:

a sequence of binary numbers; a continuously varying signal; to interference; to alter the shape; the sampling frequency; the bit rate; at discrete points; to digitize; digital video recorder; digital compression technology; to transmit; random access; an all-digital environment; high-definition television.

Exercise 2. Answer the questions:

1.What is Digital television?

2.What is the difference between digital and analog signals?

3.What will the use of digital compression allow?

4.What do you need to watch Digital TV or HDTV?

Exercise 3. Match the left part with the right :

1. Digital television is the application	by which digital signals are simplified by removing redundancy.
2. The "sampling frequency" is a measure	of digital video recorders, which stored television signals as a sequence of binary numbers.
3. The next innovation was the creation	of how many samples are taken to represent the analog wave.
4. Digital compression is the process	of digital technology to television to the process of producing and transmitting television programming.

Exercise 4. Open brackets choosing the right words:

The bandwidth (to require/ to need) for high-definition television required (development/ progress)

of a means of (transmitting/broadcasting) up to five times the video information of a traditional television signal in the same bandwidth. The (determination/solution) was the application of digital compression technology. Digital compression is the process by which digital signals are (to reduce/to simplify)by removing(redundancy/superfluity).

The Speaking Module

II. Speaking exercises:

Exercise 1. Describe words:

redundancy; compression; receiver; digital broadcasting; bandwidth;transmission

using the suggested words and expressions as in example.

Example:

redundancy- the attribute of being superfluous and unneeded;

superfluous/ of/ the attribute/ unneeded/ and/ being/.

Compression

or/something/ that/ of/the process/ is/ squeezing/ so/ smaller/ pressing/ it/

Receiver

radio/ them/ the part/ that/ and/electronic/ receives/ into/ a television/ sounds/ of/ signals/ pictures/ and/ or/ changes/

digital broadcasting

analogue/ to/ assigned/ rather/ bands/ over/ channels/ digital/ is/ waveforms/ frequency/ than/ carry/ of/ bands/ radio/ broadcasts/ television/ data/ using/ the practice

Bandwidth

a band/ range/of/ a particular/ within/ can be/ distortion/ constituting/ which/ frequencies/ without/ signal/ the smallest/ transmitted

Transmission

location/ as/ from/ electromagnetic/ from/ a receiver/ the broadcasting/ to/ one/ waves/

a transmitter/ of/ another/ to

Exercise 2.Ask questions to the given answers:

1) Question:_________________________________ ?

Answer: The primary attributes of a digital signal are the sampling frequency and the bit rate.

2) Question:_________________________________ ?

Answer: A higher bit rate results in a greater number of values for the signal, and, hence, a higher resolution.

3) Question:_________________________________ ?

Answer: Digital technology was first applied to television to create special video effects that were not possible using analog technology.