Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies . It is typically measured in unit of hertz (symbol Hz).
69-461: The Noel Edmonds Saturday Roadshow is a BBC television light entertainment show which was broadcast on Saturday evenings from 3 September 1988 to 15 December 1990. It was presented by Noel Edmonds , his first major TV project since the demise of The Late, Late Breakfast Show in 1986. The pre-recorded programme contained several elements which had been found in its predecessor, such as phone-in quizzes, celebrity interviews and bands performing in
138-417: A communication channel , or a signal spectrum . Baseband bandwidth is equal to the upper cutoff frequency of a low-pass filter or baseband signal, which includes a zero frequency. Bandwidth in hertz is a central concept in many fields, including electronics , information theory , digital communications , radio communications , signal processing , and spectroscopy and is one of the determinants of
207-476: 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 BBC Content . The BBC operates several television networks, television stations (although there
276-548: A television licence fee which TV viewers are required to pay annually. This includes viewers who watch real-time streams or catch up services of the BBC's channels online or via their mobile phone. The BBC's international television channels are funded by advertisements and subscription. These channels are also available outside the UK in neighbouring countries e.g. Belgium, the Netherlands and
345-419: A transition band the gain is not specified. In this case, the filter bandwidth corresponds to the passband width, which in this example is the 1 dB-bandwidth. If the filter shows amplitude ripple within the passband, the x dB point refers to the point where the gain is x dB below the nominal passband gain rather than x dB below the maximum gain. In signal processing and control theory
414-551: A converted wing of Alexandra Palace in London. "Ally Pally" housed two studios, various scenery stores, make-up areas, dressing rooms, offices, and the transmitter itself, which then broadcast on the VHF band. BBC television initially used two systems on alternate weeks: the 240-line Baird intermediate film system and the Marconi-EMI 405-line television system . The use of both formats made
483-505: A lever at the side of the tank to empty the gunge over the contestant. Another item was "Clown Court", where a guest actor from a TV series would be on trial for all the bloopers made during the shooting of that show, such as Sylvester McCoy in the title role of Doctor Who , and Tony Robinson as his character of Baldrick in Blackadder the Third . BBC television BBC Television
552-466: A range of programmes intended to be eclectic and diverse (although if a programme has high audience ratings it is often eventually repositioned to BBC One). The different remit of BBC2 allowed its first controller, David Attenborough to commission the first heavyweight documentaries and documentary series such as Civilisation , The Ascent of Man and Horizon . Attenborough was later granted sabbatical leave from his job as Controller to work with
621-466: A result, the BBC Television division is now known internally as BBC Content and "BBC Television" as an entity has ceased to exist. On 8 December 2020, Moore announced a new leadership structure for BBC Content taking effect in April 2021, which will prioritise iPlayer in order to compete with commercial streaming services. The role of Controller for BBC One, Two, and Four will be scrapped, in favour of giving
690-435: A system of frequency response H ( f ) {\displaystyle H(f)} is the bandwidth of an ideal filter with rectangular frequency response centered on the system's central frequency that produces the same average power outgoing H ( f ) {\displaystyle H(f)} when both systems are excited with a white noise source. The value of the noise equivalent bandwidth depends on
759-515: A trial basis for six months; early television sets supported both resolutions. However, the Baird system, which used a mechanical camera for filmed programming and Farnsworth image dissector cameras for live programming, proved too cumbersome and visually inferior, and ended with closedown (at 22:00) on Saturday 30 January 1937. It was advertised in Radio Times for two weeks later but the decision to end
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#1733084876487828-631: Is a less meaningful measure in wideband applications. A percent bandwidth of 100% corresponds to a ratio bandwidth of 3:1. All higher ratios up to infinity are compressed into the range 100–200%. Ratio bandwidth is often expressed in octaves (i.e., as a frequency level ) for wideband applications. An octave is a frequency ratio of 2:1 leading to this expression for the number of octaves, log 2 ( B R ) . {\displaystyle \log _{2}\left(B_{\mathrm {R} }\right).} The noise equivalent bandwidth (or equivalent noise bandwidth (enbw) ) of
897-611: 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
966-440: Is also used in spectral width , and more generally for the extent of functions as full width at half maximum (FWHM). In electronic filter design, a filter specification may require that within the filter passband , the gain is nominally 0 dB with a small variation, for example within the ±1 dB interval. In the stopband (s), the required attenuation in decibels is above a certain level, for example >100 dB. In
1035-458: Is also used to denote system bandwidth , for example in filter or communication channel systems. To say that a system has a certain bandwidth means that the system can process signals with that range of frequencies, or that the system reduces the bandwidth of a white noise input to that bandwidth. The 3 dB bandwidth of an electronic filter or communication channel is the part of the system's frequency response that lies within 3 dB of
1104-449: Is defined as the ratio of the upper and lower limits of the band, B R = f H f L . {\displaystyle B_{\mathrm {R} }={\frac {f_{\mathrm {H} }}{f_{\mathrm {L} }}}\,.} Ratio bandwidth may be notated as B R : 1 {\displaystyle B_{\mathrm {R} }:1} . The relationship between ratio bandwidth and fractional bandwidth
1173-609: Is generally very little distinction between the two terms in the UK), and related programming services in the United Kingdom. As well as being a broadcaster, the corporation also produces a large number of its own outsourcing programmes and thereby ranks as one of the world's largest television production companies. John Logie Baird set up the Baird Television Development Company in 1926; on 30 September 1929, he made
1242-490: Is given by, B F = 2 B R − 1 B R + 1 {\displaystyle B_{\mathrm {F} }=2{\frac {B_{\mathrm {R} }-1}{B_{\mathrm {R} }+1}}} and B R = 2 + B F 2 − B F . {\displaystyle B_{\mathrm {R} }={\frac {2+B_{\mathrm {F} }}{2-B_{\mathrm {F} }}}\,.} Percent bandwidth
1311-408: Is half its maximum value (or the spectral amplitude, in V {\displaystyle \mathrm {V} } or V / H z {\displaystyle \mathrm {V/{\sqrt {Hz}}} } , is 70.7% of its maximum). This figure, with a lower threshold value, can be used in calculations of the lowest sampling rate that will satisfy the sampling theorem . The bandwidth
1380-592: Is inconsequentially larger. For wideband applications they diverge substantially with the arithmetic mean version approaching 2 in the limit and the geometric mean version approaching infinity. Fractional bandwidth is sometimes expressed as a percentage of the center frequency ( percent bandwidth , % B {\displaystyle \%B} ), % B F = 100 Δ f f C . {\displaystyle \%B_{\mathrm {F} }=100{\frac {\Delta f}{f_{\mathrm {C} }}}\,.} Ratio bandwidth
1449-459: Is often quoted relative to the frequency of operation which gives a better indication of the structure and sophistication needed for the circuit or device under consideration. There are two different measures of relative bandwidth in common use: fractional bandwidth ( B F {\displaystyle B_{\mathrm {F} }} ) and ratio bandwidth ( B R {\displaystyle B_{\mathrm {R} }} ). In
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#17330848764871518-550: Is split up into fifteen regions (such as South West and East), which exist mainly to produce local news programming, but also occasionally opt out of the network to show programmes of local importance (such as major local events). The other nations of the United Kingdom (Wales, Scotland and Northern Ireland) have been granted more autonomy from the English network; for example, programmes are mostly introduced by local announcers, rather than by those in London. BBC One and BBC Two schedules in
1587-480: Is the total bandwidth (i.e. the maximum passband bandwidth of the carrier-modulated RF signal and the minimum passband bandwidth of the physical passband channel), and W {\displaystyle W} is the positive bandwidth (the baseband bandwidth of the equivalent channel model). For instance, the baseband model of the signal would require a low-pass filter with cutoff frequency of at least W {\displaystyle W} to stay intact, and
1656-620: Is usually defined as the arithmetic mean of the upper and lower frequencies so that, f C = f H + f L 2 {\displaystyle f_{\mathrm {C} }={\frac {f_{\mathrm {H} }+f_{\mathrm {L} }}{2}}\ } and B F = 2 ( f H − f L ) f H + f L . {\displaystyle B_{\mathrm {F} }={\frac {2(f_{\mathrm {H} }-f_{\mathrm {L} })}{f_{\mathrm {H} }+f_{\mathrm {L} }}}\,.} However,
1725-557: The BBC Studios Natural History Unit which had existed since the 1950s. This unit is now famed throughout the world for producing high quality programmes with Attenborough such as Life on Earth , The Private Life of Plants , The Blue Planet , The Life of Mammals , Planet Earth and Frozen Planet . National and regional variations also occur within the BBC One and BBC Two schedules. England's BBC One output
1794-502: The Roadshow would come from a new, different and exotic location each week. These 'locations' were in fact elaborate studio sets dressed to resemble each week's location, such as the North Pole , a space station , Hollywood , or Niagara Falls . The ironically cheap production values of these sets were frequently made light of by Edmonds. The show also introduced regular features such as
1863-459: The Sky Digital platform, such as Scottish Premier League and Scottish Cup football , while on other platforms such broadcasts were not disrupted. Later, when rights contracts were renewed, this problem was resolved. The BBC Television department headed by Jana Bennett was absorbed into a new, much larger group; BBC Vision, in late 2006. The new group was part of larger restructuring within
1932-540: The § Fractional bandwidth is smaller. Bandwidth is a key concept in many telecommunications applications. In radio communications, for example, bandwidth is the frequency range occupied by a modulated carrier signal . An FM radio receiver's tuner spans a limited range of frequencies. A government agency (such as the Federal Communications Commission in the United States) may apportion
2001-533: The 30-line images, carried by telephone line to the medium wave transmitter at Brookmans Park , until 11 September 1935, by which time advances in the all-electronic 405-line television system made electromechanical broadcasts and systems obsolete. Following a series of test transmissions and special broadcasts that began in August 1936, the BBC Television Service officially launched on 2 November 1936 from
2070-447: The BBC announced plans to merge BBC News (for UK audiences) and BBC World News (for international audiences) as one international news network, under the name BBC News, covering news from both the UK and around the world. The merger took effect in April 2023. In November 2024, six BBC FAST channels were added to Australia's 9Now platform. The BBC domestic television channels do not broadcast advertisements; they are instead funded by
2139-522: The BBC announced that from the end of May 2003 (subsequently deferred to 14 July) it intended to transmit all eight of its domestic television channels (including the 15 regional variations of BBC1) unencrypted from the Astra 2D satellite. This move was estimated to save the BBC £85 million over the next five years. While the "footprint" of the Astra 2D satellite was smaller than that of Astra 2A , from which it
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2208-456: The BBC with the onset of new media outlets and technology. In 2008, the BBC began experimenting with live streaming of certain channels in the UK, and in November 2008, all standard BBC television channels were made available to watch online via BBC iPlayer . When Tony Hall became Director General in April 2013, he reverted the division to its original name of BBC Television. As Television it
2277-421: The BBC's genre heads autonomy in commissioning programmes without the requirement for a channel controller to provide secondary approval. A team of "portfolio editors" will select from these commissions for carriage on BBC television channels and iPlayer, with iPlayer Controller Dan McGolpin will becoming Portfolio Director for iPlayer and channels. McGolpin and the genre heads will report to Moore. In July 2022,
2346-477: The BBC's service the world's first regular high-definition television service; it broadcast from Monday to Saturday between 15:00 and 16:00, and 21:00 and 22:00. The first programme broadcast – and thus the first ever, on a dedicated TV channel – was "Opening of the BBC Television Service" at 15:00. The first major outside broadcast was the coronation of George VI and Elizabeth in May 1937. The two systems were to run on
2415-695: The BBC. Programmes have also been imported mainly from English-speaking countries: notable—though no longer shown—examples include The Simpsons from the United States and Neighbours from Australia. Programming from countries outside the English-speaking world consisted of feature films, shown in the original language with subtitles instead of being dubbed , with dubbing only used for cartoons and children's programmes. These included programmes from Eastern Europe , including The Singing Ringing Tree from East Germany , although voice-over translation
2484-527: The Baird system was made too late for it be changed in the printed Radio Times . Initially, the station's range was officially a 40 kilometres radius of the Alexandra Palace transmitter—in practice, however, transmissions could be picked up a good deal further away, and on one occasion in 1938 were picked up by engineers at RCA in New York, who were experimenting with a British television set. The service
2553-635: The Fat , and BBC Northern Ireland's talk show Patrick Kielty Almost Live . During the 1980s, the BBC came under pressure to commission more programmes from independent British production companies, and following the Broadcasting Act 1990 it was legally required to source 25% of its output from such companies by the terms of the Act. This eventually led to the creation of the "WoCC" (Window of Creative Competition) for independent production companies to pitch programmes to
2622-518: The Gunge Tank, the "Gotcha Oscars" and "Wait 'Till I Get You Home", which would all be carried across and subsequently developed in Noel's House Party . The Gunge Tank was a booth with a large tank of slime at the top. A member of the public would sit inside and try to win prizes by answering a set number of questions before their time ran out. If they failed they would be 'gunged' by Noel Edmonds who would pull
2691-546: The Republic of Ireland. For BBC News, CBBC and Cbeebies see national & international channels On 3 April 2023, the BBC merged the BBC News and BBC World News channels into a single networked news channel, but there are opt-outs for both the domestic and international versions. The BBC's wholly owned commercial subsidiary, BBC Studios , also operates several international television channels under BBC branding: The BBC also owns
2760-573: The bandwidth is the frequency at which the closed-loop system gain drops 3 dB below peak. In communication systems, in calculations of the Shannon–Hartley channel capacity , bandwidth refers to the 3 dB-bandwidth. In calculations of the maximum symbol rate , the Nyquist sampling rate , and maximum bit rate according to the Hartley's law , the bandwidth refers to the frequency range within which
2829-496: The capacity of a given communication channel . A key characteristic of bandwidth is that any band of a given width can carry the same amount of information , regardless of where that band is located in the frequency spectrum . For example, a 3 kHz band can carry a telephone conversation whether that band is at baseband (as in a POTS telephone line) or modulated to some higher frequency. However, wide bandwidths are easier to obtain and process at higher frequencies because
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2898-585: The center frequency is sometimes defined as the geometric mean of the upper and lower frequencies, f C = f H f L {\displaystyle f_{\mathrm {C} }={\sqrt {f_{\mathrm {H} }f_{\mathrm {L} }}}} and B F = f H − f L f H f L . {\displaystyle B_{\mathrm {F} }={\frac {f_{\mathrm {H} }-f_{\mathrm {L} }}{\sqrt {f_{\mathrm {H} }f_{\mathrm {L} }}}}\,.} While
2967-402: The context of Nyquist symbol rate or Shannon-Hartley channel capacity for communication systems it refers to passband bandwidth. The Rayleigh bandwidth of a simple radar pulse is defined as the inverse of its duration. For example, a one-microsecond pulse has a Rayleigh bandwidth of one megahertz. The essential bandwidth is defined as the portion of a signal spectrum in
3036-566: The existing VHF 405-line television system. On 1 July 1967, BBC Two became the first television channel in Europe to broadcast regularly in colour, using the West German PAL system that was used for decades until it was gradually superseded by digital systems. ( BBC One and ITV began 625-line colour broadcasts simultaneously on 15 November 1969). Unlike other terrestrial channels, BBC Two does not have soap opera or standard news programming, but
3105-570: The first experimental television broadcast for the BBC from its studio in Long Acre in the Covent Garden area of London via the BBC's London radio transmitter propagating an analog signal . Baird used his electromechanical system with a vertically scanned image of 30 lines, which is just enough resolution for a close-up of one person, and a bandwidth low enough to use existing radio transmitters. The simultaneous transmission of sound and pictures
3174-404: The following, the absolute bandwidth is defined as follows, B = Δ f = f H − f L {\displaystyle B=\Delta f=f_{\mathrm {H} }-f_{\mathrm {L} }} where f H {\displaystyle f_{\mathrm {H} }} and f L {\displaystyle f_{\mathrm {L} }} are
3243-401: The following: BBC Japan was a general entertainment channel, which operated between December 2004 and April 2006. It ceased operations after its Japanese distributor folded. Bandwidth (signal processing) It may refer more specifically to two subcategories: Passband bandwidth is the difference between the upper and lower cutoff frequencies of, for example, a band-pass filter ,
3312-470: The frequencies beyond which performance is degraded. In the case of frequency response , degradation could, for example, mean more than 3 dB below the maximum value or it could mean below a certain absolute value. As with any definition of the width of a function, many definitions are suitable for different purposes. In the context of, for example, the sampling theorem and Nyquist sampling rate , bandwidth typically refers to baseband bandwidth. In
3381-1274: The frequency domain using H ( f ) {\displaystyle H(f)} or in the time domain by exploiting the Parseval's theorem with the system impulse response h ( t ) {\displaystyle h(t)} . If H ( f ) {\displaystyle H(f)} is a lowpass system with zero central frequency and the filter reference gain is referred to this frequency, then: B n = ∫ − ∞ ∞ | H ( f ) | 2 d f 2 | H ( 0 ) | 2 = ∫ − ∞ ∞ | h ( t ) | 2 d t 2 | ∫ − ∞ ∞ h ( t ) d t | 2 . {\displaystyle B_{n}={\frac {\int _{-\infty }^{\infty }|H(f)|^{2}df}{2|H(0)|^{2}}}={\frac {\int _{-\infty }^{\infty }|h(t)|^{2}dt}{2\left|\int _{-\infty }^{\infty }h(t)dt\right|^{2}}}\,.} The same expression can be applied to bandpass systems by substituting
3450-459: The frequency domain which contains most of the energy of the signal. In some contexts, the signal bandwidth in hertz refers to the frequency range in which the signal's spectral density (in W/Hz or V /Hz) is nonzero or above a small threshold value. The threshold value is often defined relative to the maximum value, and is most commonly the 3 dB point , that is the point where the spectral density
3519-428: The gain is non-zero. The fact that in equivalent baseband models of communication systems, the signal spectrum consists of both negative and positive frequencies, can lead to confusion about bandwidth since they are sometimes referred to only by the positive half, and one will occasionally see expressions such as B = 2 W {\displaystyle B=2W} , where B {\displaystyle B}
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#17330848764873588-406: The geometric mean is more rarely used than the arithmetic mean (and the latter can be assumed if not stated explicitly) the former is considered more mathematically rigorous. It more properly reflects the logarithmic relationship of fractional bandwidth with increasing frequency. For narrowband applications, there is only marginal difference between the two definitions. The geometric mean version
3657-418: The ideal filter reference gain used. Typically, this gain equals | H ( f ) | {\displaystyle |H(f)|} at its center frequency, but it can also equal the peak value of | H ( f ) | {\displaystyle |H(f)|} . The noise equivalent bandwidth B n {\displaystyle B_{n}} can be calculated in
3726-464: The newly acquired Lime Grove Studios . Postwar broadcast coverage was extended to Birmingham in 1949, with the opening of the Sutton Coldfield transmitting station , and by the mid-1950s most of the country was covered, transmitting a 405-line interlaced video image on VHF. BBC TV was split into BBC1 and BBC2 in 1964, with BBC2 having a remit to provide more niche programming. The channel
3795-524: The other UK nations can vary immensely from BBC One and BBC Two in England. Programmes, such as the politically fuelled Give My Head Peace (produced by BBC Northern Ireland) and the soap opera River City (produced by BBC Scotland), have been created specifically to cater for some viewers in their respective nations. BBC Scotland produces daily programmes for its Gaelic -speaking viewers, including current affairs, political and children's programming such as
3864-437: The physical passband channel would require a passband filter of at least B {\displaystyle B} to stay intact. The absolute bandwidth is not always the most appropriate or useful measure of bandwidth. For instance, in the field of antennas the difficulty of constructing an antenna to meet a specified absolute bandwidth is easier at a higher frequency than at a lower frequency. For this reason, bandwidth
3933-478: The popular Eòrpa and Dè a-nis? . BBC Wales also produces a large amount of Welsh language programming for S4C , particularly news, sport and other programmes, especially the soap opera Pobol y Cwm ('People of the Valley') briefly shown on BBC2 across the UK with subtitles in the 1990s. The UK nations also produce a number of programmes that are shown across the UK, such as BBC Scotland's comedy series Chewin'
4002-444: The regionally available bandwidth to broadcast license holders so that their signals do not mutually interfere. In this context, bandwidth is also known as channel spacing . For other applications, there are other definitions. One definition of bandwidth, for a system, could be the range of frequencies over which the system produces a specified level of performance. A less strict and more practically useful definition will refer to
4071-399: The response at its peak, which, in the passband filter case, is typically at or near its center frequency , and in the low-pass filter is at or near its cutoff frequency . If the maximum gain is 0 dB, the 3 dB bandwidth is the frequency range where attenuation is less than 3 dB. 3 dB attenuation is also where power is half its maximum. This same half-power gain convention
4140-404: The studio. The programme was a slow-burning success, and following the third series in 1990, Edmonds' popularity and reputation were sufficiently re-established with the public for Edmonds to pitch Noel's House Party to the BBC, which began in November 1991. The premise for the new show was that unlike The Late, Late Breakfast Show , which had been broadcast from the BBC's studios each week,
4209-451: The upper and lower frequency limits respectively of the band in question. Fractional bandwidth is defined as the absolute bandwidth divided by the center frequency ( f C {\displaystyle f_{\mathrm {C} }} ), B F = Δ f f C . {\displaystyle B_{\mathrm {F} }={\frac {\Delta f}{f_{\mathrm {C} }}}\,.} The center frequency
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#17330848764874278-471: The war effort, in particular on the radar programme. The last programme transmitted was a Mickey Mouse cartoon, Mickey's Gala Premier (1933), which was followed by test transmissions; this account refuted the popular memory according to which broadcasting was suspended before the end of the cartoon. According to figures from Britain's Radio Manufacturers Association, 18,999 television sets had been manufactured from 1936 to September 1939, when production
4347-616: Was achieved on 30 March 1930, by using the BBC's new twin transmitter at Brookmans Park . By late 1930, thirty minutes of morning programmes were broadcast from Monday to Friday, and thirty minutes at midnight on Tuesdays and Fridays after BBC radio went off the air. Baird's broadcasts via the BBC continued until June 1932. The BBC began its own regular television programming from the basement of Broadcasting House , London, on 22 August 1932. The studio moved to larger quarters in 16 Portland Place , London, in February 1934, and continued broadcasting
4416-479: Was due to launch on 20 April 1964, but this was postponed after a fire at Battersea Power Station resulted in most of west London, including Television Centre , losing power. A videotape made on the opening night was rediscovered in 2003 by a BBC technician. The launch went ahead the following night, beginning with host Denis Tuohy sarcastically blowing out a candle. BBC2 was the first British channel to use UHF and 625-line pictures, giving higher definition than
4485-421: Was halted by the war. BBC Television returned on 7 June 1946 at 15:00. Jasmine Bligh , one of the original announcers, made the first announcement, saying, 'Good afternoon everybody. How are you? Do you remember me, Jasmine Bligh?'. The Mickey Mouse cartoon of 1939 was repeated twenty minutes later. Alexandra Palace was the home base of the channel until the early 1950s, when the majority of production moved into
4554-429: Was previously broadcast encrypted, it meant that viewers with appropriate equipment were able to receive BBC channels "free-to-air" over much of Western Europe. Consequently, some rights concerns have needed to be resolved with programme providers such as Hollywood studios and sporting organisations, which have expressed concern about the unencrypted signal leaking out. This led to some broadcasts being made unavailable on
4623-442: Was reaching an estimated 25,000–40,000 homes before the outbreak of World War II which caused the BBC Television service to be suspended on 1 September 1939 with little warning. On 1 September 1939, the station went off the air; the government was concerned that the VHF transmissions would act as a beacon to enemy aircraft homing in on London. Also, many of the television service's technical staff and engineers would be needed for
4692-552: Was responsible for the commissioning, scheduling and broadcasting of all programming on the BBC's television channels and online, as well as producing content for broadcast. Following the 2016 Licence Fee settlement, BBC Television was split into two divisions, with in-house television production being separated into a new division called BBC Studios controlled by Mark Linsey and the remaining parts of television (channels and genre commissioning, BBC Sport and BBC iPlayer) being renamed as BBC Content, controlled by Charlotte Moore . As
4761-448: Was used instead of dubbing for budgetary reasons. Ceefax , the first teletext service, launched on 23 September 1974. This service allowed BBC viewers to view textual information such as the latest news on their television. CEEFAX did not make a full transition to digital television, instead being gradually replaced, from late onwards, by the new interactive BBCi service before being fully closed down on 22 October 2012. In March 2003
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