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amplitude modulation

Overview page. Subjects: Computing — Media Studies.

The process whereby a digital signal is sent over a transmission line by changing the amplitude of a sine wave known as a carrier.

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asynchronous communication

Overview page. Subjects: Computing — Media Studies.

The transmission of data over a communication medium where the time at which a character of the data is sent is not determined by the timing of the sending or receiving of a previous...

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avatar

Overview page. Subjects: Computing — Media Studies.

1 The icon representing the user of a virtual reality system. It is normally displayed in the window of a user's computer.

2 The representation of a user...

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broadcast quality

Overview page. Subjects: Media Studies — Computing.

A standard set of criteria by which television engineers judge whether a programme is technically fit or unfit to be broadcast. These include, on tape-based formats, the picture and audio...

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channel hopping

Overview page. Subjects: Media Studies — Computing.

The process of moving from one Internet Relay Chat channel to another very quickly. Often carried out by participants looking for sexual contacts.

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colour depth

Overview page. Subjects: Computing — Media Studies.

The number of colours that can be displayed in a pixel. The deeper the colour the larger the number of colours that can be used in a graphic but the slower it becomes to download it to,...

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communication theory

Overview page. Subjects: Media Studies — Computing.

The study of communication systems through mathematical models of their operation. It is broadly divided into information theory (the entropy formulation of sources and channels) and coding...

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content provider

Overview page. Subjects: Computing — Media Studies.

Either a Web site or a company which owns a site that provides up-to-date information about a particular topic or set of topics. Content provider sites contain a wide range of information...

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cropping

Overview page. Subjects: Media Studies — Computing.

1 The process of cutting off the edges of a picture, so as to select a part of the picture.

2 The process of adding marks (crop marks) to a page to...

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Davis, Ian Gordon McNaught- (1929–2014), mountaineer, businessman, and broadcaster

Paul Gilchrist.

in Oxford Dictionary of National Biography

P ublished online February 2018 .

Reference Entry. Subjects: Television; Sports and Outdoor Recreation; Mathematics. 1367 words.

Davis, Ian Gordon McNaught- (1929–2014), mountaineer, businessman, and broadcaster, was born on 30 August 1929 at Noordschote, Third Avenue, Newton Hill, Wakefield, Yorkshire, the son...

dropout

Overview page. Subjects: Media Studies — Computing.

In magnetic recording technology (disk and tape), the loss of one or a sequence of bits due to a fault condition, most frequently a flaw in the recording medium. Magnetic tape and disk...

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email list

Overview page. Subjects: Computing — Media Studies.

A collection of email addresses which are stored in a file. Such lists can be used by email programs for the bulk delivery of email to the members of the list.

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emoticon

Overview page. Subjects: Computing — Media Studies.

(contraction of emotion + icon) A combination of punctuation marks, and sometimes other characters, first used in electronic mail and intended to convey the mood of the writer; emoticons...

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frame rate

Overview page. Subjects: Media Studies — Computing.

The rate at which the individual images which make up a video signal are displayed; the faster the frame rate the smoother the image seems to be.

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freeze-frame

Overview page. Subjects: Computing — Media Studies.

In moving images, a still image that is created by multiple repetitions of the same picture.

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frequency modulation

Overview page. Subjects: Media Studies — Computing.

A method of encoding information into the wave of a carrier signal by increasing and decreasing its length but not altering its height. Wavelengths can be astronomically large so frequency ...

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high-definition television

Overview page. Subjects: Media Studies — Computing.

Television with more TV lines and therefore a higher resolution than standard definition systems. The system took off in the late 1990s with the rise of digital transmission, LCD and plasma...

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information superhighway

Overview page. Subjects: Computing — Media Studies.

Informal Any form of high-speed computer network. The term was sometimes used to refer to the Internet in the 1990s. See also National Information Infrastructure.

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landscape

Overview page. Subjects: Media Studies — Computing.

An orientation of a page in which the longer side is at the top. Compare portrait.

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leader

Overview page. Subjects: Media Studies — Computing.

A blank section of a tape, preceding recorded information, that is needed for threading the tape into a reading device.

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