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GLITS
Graham's Line Identification Tone System (GLITS) is a test signal for stereo systems devised by BBC TV Sound Supervisor and Fellow of thIPSGraham Haines in the mid 1980s. It comprises a 1 kHz tone at 0 dBu (- 18 dBFS) on both channels, with interruptions which identify the channels. The left channel is interrupted once for 250 ms every 4 seconds. 250 ms later the right channel has two interruptions of 250 ms spaced by 250 ms. This arrangement has an advantage over the EBU stereo ident tone in that each channel is explicitly identified as belonging to a stereo pair. The EBU Technical DocumenMultichannel Audio Line-up Tone(Tech 3304) defines stereo lineup tone as having an interruption in the left channel only, lasting 250 ms every 3 s. Multichannel GLITS There is now an official EBU standard for a multichannel BLITS 5.1 channel ident tone which is also described in the Tech 3304 paper, along with an alternative film-style m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black & Lane's Ident Tones For Surround
Black & Lane's Ident Tones for Surround (BLITS) is a way of keeping track of channels in a mixed surround-sound, stereo, and mono world.Martin BlackIPS BLITS Surround Sound Ident.pdf "BLITS Surround Sound Ident" ''Lineup'', February/March 2007, page 16 It was developed by Martin Black and Keith Lane of Sky TV London in 2004. BLITS is used by Sky, the BBC and other European and US broadcasters to identify and lineup 5.1 broadcast circuits. It is also an EBU standardEBU Tech 3304 It is designed to function as a 5.1 identification and phase-checking signal and to be meaningful in stereo when an automated downmix to stereo is employed. BLITS is a set of tones designed for television 5.1 sound line-up. It consists of three distinct sections. The first section is made up from short tones at -18 dBfs to identify each channel individually: Ø L/R: Front LEFT and Front RIGHT - 880 Hz Ø C: CENTRE - 1320 Hz Ø Lfe: (Low Frequency Effects) - 82.5 Hz Ø Ls/Rs: Surro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BBC TV
BBC Television is a service of the BBC. The corporation has operated a public broadcast television service in the United Kingdom, under the terms of a royal charter, since 1927. It produced television programmes from its own studios from 1932, although the start of its regular service of television broadcasts is dated to 2 November 1936. The BBC's domestic television channels have no commercial advertising and collectively they accounted for more than 30% of all UK viewing in 2013. The services are funded by a television licence. As a result of the 2016 Licence Fee settlement, the BBC Television division was split, with in-house television production being separated into a new division called BBC Studios and the remaining parts of television (channels and genre commissioning, BBC Sport and BBC iPlayer) being renamed as BBC Content. History of BBC Television The BBC operates several television networks, television stations (although there is generally very little distin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DBFS
Decibels relative to full scale (dBFS or dB FS) is a unit of measurement for amplitude levels in digital systems, such as pulse-code modulation (PCM), which have a defined maximum peak level. The unit is similar to the units dBov and decibels relative to overload (dBO). The level of 0dBFS is assigned to the maximum possible digital level. For example, a signal that reaches 50% of the maximum level has a level of −6dBFS, which is 6dB below full scale. Conventions differ for root mean square (RMS) measurements, but all peak measurements smaller than the maximum are negative levels. A digital signal that does not contain any samples at 0dBFS can still clip when converted to analog form due to the signal reconstruction process interpolating between samples. This can be prevented by careful digital-to-analog converter circuit design. Measurements of the true inter-sample peak levels are notated as dBTP or dB TP ("decibels true peak"). RMS levels Since a peak measurement is n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broadcast Engineering
Broadcast engineering is the field of electrical engineering, and now to some extent computer engineering and information technology, which deals with radio and television broadcasting. Audio engineering and RF engineering are also essential parts of broadcast engineering, being their own subsets of electrical engineering. Broadcast engineering involves both the studio and transmitter aspects (the entire airchain), as well as remote broadcasts. Every station has a broadcast engineer, though one may now serve an entire station group in a city. In small media markets the engineer may work on a contract basis for one or more stations as needed. Duties Modern duties of a broadcast engineer include maintaining broadcast automation systems for the studio and automatic transmission systems for the transmitter plant. There are also important duties regarding radio towers, which must be maintained with proper lighting and painting. Occasionally a station's engineer must deal with c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Test Items
Test(s), testing, or TEST may refer to: * Test (assessment), an educational assessment intended to measure the respondents' knowledge or other abilities Arts and entertainment * ''Test'' (2013 film), an American film * ''Test'' (2014 film), a Russian film * ''Test'' (group), a jazz collective * ''Tests'' (album), a 1998 album by The Microphones Computing * .test, a reserved top-level domain * test (Unix), a Unix command for evaluating conditional expressions * TEST (x86 instruction), an x86 assembly language instruction People * Test (wrestler), ring name for Andrew Martin (1975–2009), Canadian professional wrestler * John Test (1771–1849), American politician * Zack Test (born 1989), American rugby union player Science and technology * Proof test * Stress testing * Test (biology), the shell of sea urchins and certain microorganisms * Test equipment Sports * Test cricket, a series of matches played by two national representative teams * Test match (rugby league), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
