1. . . .
Vocabulary
to broadcast ;
relation ;
data flow
to represent ;
brightness
carrier frequency
transfer ;
broadcasting ;
channel
to depend
to provide ;
fixed difference of the bearing video signal and a sound in 6,5 MHz is accepted.
TRANSFER OF THE TELEVISION SIGNAL
The television signal is the set of electric signals containing information on the television image and a sound. In most cases the term is used in relation to analog television because the digital television operates with such concept as a data flow.
The full television signal of color analog television represents set of three signals: the video signal bearing information on brightness of the image, the color coded information on color of the image, and a sound signal.
Each of the listed signals uses the carrier frequency for transfer on distance which is defined by the concrete standard of television broadcasting and number of the used channel. The difference of the carrier frequencies of video signal and a sound is strictly standardized in each country and doesn't depend on the used number of broadcast channel. In Russia the analog broadcasting standard providing the fixed difference of the carrier video signal and a sound in 6,5 MHz is accepted.
Questions
1. What is a television signal?
2. How many television signals do you know?
3. What frequency do television signals use for transfer on distance?
4. Does the difference of the carrier frequencies of video signal and a sound depend on the used number of broadcast channel?
5. Is the analog broadcasting standard is accepted in Russia?
Task 2. Translate and write down the following words and word combinations in your workbooks. Make up a short plan of the text TRANSFER OF THE TELEVISION SIGNAL and write it down in your workbooks, summarize the text in short.
2. . , .
Short theoretical information and a sample of implementation
( )
(passive voice) , , , : The parcels were delivered. - .
, , , .
, , to be , (Participle II) : The parcels will have been delivered. - .
|
|
|
not , , : He has not been seen anywhere. - .
( ) : Was your parcel delivered? - ?
| Simple | Continuous | Perfect | |
| Present | space is explored | space is being explored | space has been explored |
| Past | space was explored | space was being explored | space had been explored |
| Future | space will be explored | --- | space will have been explored |
Perfect Continuous Future Continuous.
Choose the correct variant. .
1. I ______ by the news he had told me the day before.
am surprising
surprised
was surprised
am surprised
2. Its generally agreed that new industries ______ for the southern part of the country.
are need
are needed
need
3. The problem ______ to me.
was saying
was mentioned
was being mentioning
4. He ______ for nearly 12 hours.
operates with
is operated at
was operated on
5. His decision ______.
approves of
was approved of
6. Better results ______ soon.
will be expected
are expected
expect
Translate the following words and word combinations in written form.
.
Words
cable_________________
term_________________
color_________________
image________________
accept________________
Word combinations
set of electric signals____________________
television image________________________
analog television________________________
digital television________________________
full television signal_____________________
Task 3. Prepare a presentation of the topic TRANSFER OF THE TELEVISION SIGNAL: make up slides about the topic TRANSFER OF THE TELEVISION SIGNAL, write down the material of the slides in your workbooks, prepare your report (presentation) for the demonstration it in the lecture-room.
3. : , , () .
15. 15. Unit 3.4. TYPES OF TELEVISION SIGNALS
3.4.
