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Unit 4 Digital tv

1. Match the English words and phrases with their Ukrainian equivalents.

1) depend on a) трансляція по антені

2) digital TV b) телеканал

3) analog TV c) цифрове телебачення

4) an antenna broadcast d) потік цифрової інформації

5) TV receiver e) залежати від

6) stream of digital data f) аналогове телебачення

7) the ability to use g) спектр радіомовлення

8) the radio spectrum h) можливість використовувати

9) TV channel i) телеприймач

2. Find in the text the English equivalents for the following Ukrainian words and word combinations :

цифрове телебачення, відношення, диктор, символізувати, передавати радіо сигнали, формати стандартного визначення, телебачення високої чіткості.

3. Arrange synonyms in pairs and memorize them:

receive, antenna, cause, to do, value, new, compound, sphere, work, to permit, up-to-date, data, reason, get, aerial, amount, composite, information, function, to perform, to allow, branch.

4. Write down 15 words related to the topic and make up your own sentences.

5. Read the text and translate it into Ukrainian.Use a dictionary if necessary.

Digital tv

Digital television (DTV) is the transmission of audio and video by digitally processed and multiplexed signal, in contrast to the totally analog and channel separated signals used by analog TV. It is an innovative service that represents a significant evolution in television technology since color television in the 1950s. Many countries are replacing broadcast analog television with digital television to allow other uses of the television radio spectrum. Several regions of the world are in different stages of adaptation and are implementing different broadcasting standards. There are four different digital television terrestrial broadcasting standards and they are: Advanced Television System Committee uses eight-level vestigial sideband for terrestrial broadcasting. This standard has been adopted in the United States and in other countries. Digital Video Broadcasting-Terrestrial (DVB-T) uses coded orthogonal frequency-division multiplexing (C-OFDM) modulation and supports hierarchical transmission. This standard has been adapted in Europe, Australia and New Zealand. Terrestrial Integrated Services Digital Broadcasting is a system designed to provide good reception to fix receivers and also portable or mobile receivers. It utilizes OFDM and two-dimensional interleaving. It supports hierarchical transmission of up to three layers and uses MPEG-2 video and advanced audio coding. This standard has been adopted in Japan and most of South America. Digital Terrestrial Multimedia Broadcasting adopts time-domain synchronous (TDS)- OFDM technology utilizing a pseudo random signal frame to serve as the guard interval (GI) of the OFDM block and the training symbol. The DTMB standard has been adopted in the People's Republic of China (PRC), including Hong Kong and Macau.

With digital terrestrial television (DTV) broadcasting, the range of formats can be broadly divided into two categories: high definition television (HDTV) for the transmission of high-definition video and standard-definition television (SDTV). Digital television signals must not interfere with each other, and they must also coexist with analog television until it is phased out.

The digital television transition, also called the digital switchover or analogue switch-off, is the process in which analog television broadcasting is converted to and replaced by digital television. This primarily involves the conversion of analogue terrestrial television to digital terrestrial. However, it also involves analogue cable conversion to digital cable, as well as analogue to digital satellite.

Digital terrestrial television is the technological evolution of broadcast television and an advancement of analog television. DTTV broadcasts land-based (terrestrial) signals. The purposes of digital terrestrial television, similar to digital versus analog in other platforms such as cable, satellite, and telecommunications, reduced use of spectrum and to provide more capacity than analog, provide better quality picture, and to lower operating costs for broadcast and transmission. A terrestrial implementation of DTV technology uses an aerial to broadcast to a conventional television antenna instead of a satellite dish or cable television connections.