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Peak Programme Meter
A peak programme meter (PPM) is an instrument used in professional audio that indicates the level of an audio signal. Different kinds of PPM fall into broad categories: *True peak programme meter. This shows the peak level of the waveform no matter how brief its duration. *Quasi peak programme meter (QPPM). This only shows the true level of the peak if it exceeds a certain duration, typically a few milliseconds. On peaks of shorter duration, it indicates less than the true peak level. The extent of the shortfall is determined by the 'integration time'. *Sample peak programme meter (SPPM). This is a PPM for digital audio. It shows only peak sample values, not true waveform peaks (which may fall between samples and be up to 3 dB higher in amplitude). It may have either a 'true' or a 'quasi' integration characteristic. *Over-sampling peak programme meter. This is a sample PPM that first oversamples the signal, typically by a factor of four, to alleviate the problems of a bas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Second
The second (symbol: s) is the unit of time in the International System of Units (SI), historically defined as of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each (24 × 60 × 60 = 86400). The current and formal definition in the International System of Units ( SI) is more precise:The second ..is defined by taking the fixed numerical value of the caesium frequency, Δ''ν''Cs, the unperturbed ground-state hyperfine transition frequency of the caesium 133 atom, to be when expressed in the unit Hz, which is equal to s−1. This current definition was adopted in 1967 when it became feasible to define the second based on fundamental properties of nature with caesium clocks. Because the speed of Earth's rotation varies and is slowing ever so slightly, a leap second is added at irregular intervals to civil time to keep clocks in sync with Earth's rotation. Uses Analog clocks and watches often ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broadcasting House
Broadcasting House is the headquarters of the BBC, in Portland Place and Langham Place, London. The first radio broadcast from the building was made on 15 March 1932, and the building was officially opened two months later, on 15 May. The main building is in Art Deco style, with a facing of Portland stone over a steel frame. It is a Grade II* listed building and includes the BBC Radio Theatre, where music and speech programmes are recorded in front of a studio audience. As part of a major consolidation of the BBC's property portfolio in London, Broadcasting House has been extensively renovated and extended. This involved the demolition of post-war extensions on the eastern side of the building, replaced by a new wing completed in 2005. The wing was named the "John Peel Wing" in 2012, after the disc jockey. BBC London, BBC Arabic Television and BBC Persian Television are housed in the new wing, which also contains the reception area for BBC Radio 1 and BBC Radio 1Xtra (th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spliced
Spliced may refer to: *Spliced, the result of rope splicing Rope splicing in ropework is the forming of a semi-permanent joint between two ropes or two parts of the same rope by partly untwisting and then interweaving their strands. Splices can be used to form a stopper at the end of a line, to form a l ... * ''Spliced'' (film), a 2002 horror film * ''Spliced'' (TV series), a cartoon series that started in 2009 {{Dab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sveriges Television
Sveriges Television AB ("Sweden's Television Stock Company"), shortened to SVT (), is the Sweden, Swedish national public broadcasting, public television broadcaster, funded by a public service tax on personal income set by the Riksdag (national parliament). Prior to 2019, SVT was funded by a television licence fee payable by all owners of television sets. The Swedish public broadcasting system is largely modelled after the system used in the United Kingdom, and Sveriges Television shares many traits with its British counterpart, the BBC. SVT is a public limited company that can be described as a quasi-autonomous non-government organisation. Together with the other two public broadcasters, Sveriges Radio and Sveriges Utbildningsradio, it is owned by an independent foundation, ''Foundation Management for SR, SVT, and UR, Förvaltningsstiftelsen för Sveriges Radio AB, Sveriges Television AB och Sveriges Utbildningsradio AB''. The foundation's board consists of 13 politicians, repr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Institut Für Rundfunktechnik
The Institut für Rundfunktechnik GmbH (IRT) (''Institute for Broadcasting Technology Ltd.'') was a research centre of German broadcasters ( ARD / ZDF / DLR), Austria's broadcaster ( ORF) and the Swiss public broadcaster ( SRG / SSR). It was responsible for research on broadcasting technology. It was founded in 1956 and was located in Munich, Germany. They invented or were influential in the research, development and field-testing of important standards such as ARI, RDS, VPS, DSR, DAB and DVB-T. Institut für Rundfunktechnik was a founding member of the Hybrid Broadcast Broadband TV (HbbTV) consortium of broadcasting and Internet industry companies that established an open European standard (called HbbTV) for hybrid set-top boxes for the reception of broadcast TV and broadband multimedia applications with a single user interface. In 2020, ZDF and then other supporters indicated that they planned to withdraw from the organization, so the IRT was closed by the end of 2020. For ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ARD (broadcaster)
ARD is a joint organisation of Germany's regional public-service broadcasters. It was founded in 1950 in West Germany to represent the common interests of the new, decentralised, post-war broadcasting services – in particular the introduction of a joint television network. The ARD has a budget of €6.9 billion, 22,612 employees and is the largest public broadcaster network in the world. The budget comes primarily from a licence fee which every household, company and public institution are required by law to pay. For an ordinary household the fee is currently €18.36 per month. Households living on welfare are exempt from the fee. The fees are not collected directly by the ARD, but by the Beitragsservice (formerly known as Gebühreneinzugszentrale GEZ), a common organisation of the ARD member broadcasters, the second public TV broadcaster ZDF, and Deutschlandradio. ARD maintains and operates a national television network, called ''Das Erste'' ("The First") to differentiat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quasi-peak
A quasi-peak detector is a type of electronic detector or rectifier. Quasi-peak detectors for specific purposes have usually been standardized with mathematically precisely defined dynamic characteristics of attack time, integration time, and decay time or fall-back time. Quasi-peak detectors play an important role in electromagnetic compatibility (EMC) testing of electronic equipment, where allowed levels of electromagnetic interference (EMI), also called radio frequency interference (RFI), are given with reference to measurement by a specified quasi-peak detector. This was originally done because the quasi-peak detector was believed to better indicate the subjective annoyance level experienced by a listener hearing impulsive interference to an AM radio station. Over time standards incorporating quasi-peak detectors as the measurement device were extended to frequencies up to 1 GHz, although there may not be any justification beyond previous practice for using the quasi-peak det ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neper
The neper (symbol: Np) is a logarithmic unit for ratios of measurements of physical field and power quantities, such as gain and loss of electronic signals. The unit's name is derived from the name of John Napier, the inventor of logarithms. As is the case for the decibel and bel, the neper is a unit defined in the international standard ISO 80000. It is not part of the International System of Units (SI), but is accepted for use alongside the SI. Definition Like the decibel, the neper is a unit in a logarithmic scale. While the bel uses the decadic (base-10) logarithm to compute ratios, the neper uses the natural logarithm, based on Euler's number (). The level a ratio of two signal amplitudes or root-power quantities, with the unit neper, is given by : L = \ln\frac\mathrm, where x_1 and x_2 are the signal amplitudes, and is the natural logarithm. The level of a ratio of two power quantities, with the unit neper, is given by : L = \frac \ln\frac\mathrm, where p_1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
