Broadcasting

Broadcasting is the distribution of audio and/or video content to a dispersed audience via any electronic mass communications medium, but typically one using the electromagnetic spectrum (radio waves), in a one-to-many model. Broadcasting began with AM radio broadcasting which came into popular use starting with the invention of the crystal detector in 1906. Before this, all forms of electronic communication, radio, telephone, and telegraph, were "one-to-one", with the message intended for a single recipient. The term "broadcasting", borrowed from the agricultural method of sowing seeds in a field by casting them broadly about, was coined by either KDKA manager Frank Conrad or RCA historian George Clark around 1920 to distinguish this new activity of "one-to-many" communication; a single radio station transmitting to multiple listeners.

Over the air Broadcasting is usually associated with radio and television, though in practice radio and television transmissions take place using both wires and radio waves. The receiving parties may include the general public or a relatively small subset; the point is that anyone with the appropriate receiving technology can receive the signal. The field of broadcasting includes a wide range of practices, from relatively private exchanges such as public radio, community radio and commercial radio, public television, and commercial television.

Blaster (Transformers)

Blaster is the name of several fictional characters in the Transformers television and comic series based on the popular toy line produced by Takara Tomy and Hasbro. Due to trademark reasons, he is sometimes called Autobot Blaster. He is an Autobot who specializes in communications.

Transformers: Generation 1

Blaster's initial transformation is an AM/FM Stereo Cassette Player, commonly referred to as a boombox or ghettoblaster, hence the name. Blaster was a popular character from the original series while not featuring as prominently in the modern Transformers universe.

As a member of the Autobot communications sub-group Blaster frequently worked with its other members - Eject, Grand Slam, Raindance, Ramhorn, Rewind and Steeljaw. He is the Autobots' answer to the evil Decepticon Soundwave.

Blaster (Tempo in France, Radiorobot in Italy, Broadcast in Japan), like the Autobot Jazz, has a great love of Earth culture, rock music and other forms of music as long as it is hard. He's normally at the forefront of any given situation. As an AM/FM stereo cassette player, he can perform as a deck, plus receive radio signals on a variety of frequencies. Acting as the Autobot communications center, he can transmit signals within a 4,000 mile radius. Blaster is sometimes depicted as carrying various tape warriors within his deck, including (Steeljaw, Ramhorn, Rewind and Eject).

Broadcast (magazine)

Broadcast is a weekly magazine for the United Kingdom television and radio industry. It covers a wide range of news and issues affecting the professional broadcast market in the UK. Broadcast has regular weekly sections covering news, commissioning, facilities, analysis, opinion, interview, platforms, production and ratings. Broadcast also often has a special feature covering an issue relevant to the industry. It is owned by British media giant Top Right Group, which counts Emap, 4C, Cannes Lions and i2i Events as subsidiaries. Broadcast previously fell within Emap, but at the start of 2013 it was separated off from the other Emap magazines to sit within the newly formed, Media Business Insight, another subsidiary of Top Right Group. Other titles within Media Business Insight include Screen International and Shots.

Broadcast was started in 1973 by Rod Allen, who went on to work at LWT, HTV and HarperCollinsInteractive. He was most recently head of the Department of Journalism at City University, London, until he retired in 2006. He still contributes occasionally to the magazine.

Distortion

Distortion is the alteration of the original shape (or other characteristic) of something, such as an object, image, sound or waveform. Distortion is usually unwanted, and so engineers strive to eliminate distortion, or minimize it. In some situations, however, distortion may be desirable. The important signal processing operation of heterodyning is based on nonlinear mixing of signals to cause intermodulation. Distortion is also used as a musical effect, particularly with electric guitars.

The addition of noise or other outside signals (hum, interference) is not deemed distortion, though the effects of quantization distortion are sometimes deemed noise. A quality measure that explicitly reflects both the noise and the distortion is the Signal-to-noise-and-distortion (SINAD) ratio.

Electronic signals

In telecommunication and signal processing, a noise-free system can be characterised by a transfer function, such that the output can be written as a function of the input as

When the transfer function comprises only a perfect gain constant A and perfect delay T

Distortion (Joseph Simmons album)

Distortion is the first solo album from Rev. Run formerly of Run–D.M.C. It was originally scheduled to be released in 2003, but was delayed until 2005. "Mind on the Road" peaked at 98 on the Pop 100. The album debuted at 78 on the Top R&B/Hip-Hop albums chart.

Track listing

References

Distortion (optics)

In geometric optics and cathode ray tube (CRT) displays, distortion is a deviation from rectilinear projection, a projection in which straight lines in a scene remain straight in an image. It is a form of optical aberration.

Radial distortion

Although distortion can be irregular or follow many patterns, the most commonly encountered distortions are radially symmetric, or approximately so, arising from the symmetry of a photographic lens. These radial distortions can usually be classified as either barrel distortions or pincushion distortions. See van Walree.

Mathematically, barrel and pincushion distortion are quadratic, meaning they increase as the square of distance from the center. In mustache distortion the quartic (degree 4) term is significant: in the center, the degree 2 barrel distortion is dominant, while at the edge the degree 4 distortion in the pincushion direction dominates. Other distortions are in principle possible – pincushion in center and barrel at the edge, or higher order distortions (degree 6, degree 8) – but do not generally occur in practical lenses, and higher order distortions are small relative to the main barrel and pincushion effects.