Anagram & Information om | Engelska ordet SECAM
SECAM
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Exempel på hur du använder SECAM i en mening
- Vietnam, Cambodia and Laos used System M with SECAM color - Vietnam later started using PAL in the early 1990s.
- Like PAL, a SECAM picture is also made up of 625 interlaced lines and is displayed at a rate of 25 frames per second (except SECAM-M).
- Although the rest of the Eastern Bloc countries adopted the French, Soviet-backed SECAM system, TVR chose to implement the West German PAL system.
- After the construction of the OTE Tower in the Thessaloniki Fair area, OTE started a third state TV channel in the SECAM color format.
- However, both channels reportedly continued to be unofficially broadcast in analogue via UHF, presumably near the DMZ, albeit using the SECAM D/K standard.
- The term refers to devices capable of displaying 480-line or 576-line signals in progressive scan, commonly referred to as 480p (NTSC-HQ) and 576p (PAL/SECAM) respectively, as opposed to interlaced scanning, commonly referred to as 480i (NTSC) or 576i (PAL, SECAM).
- Various transmission standards are used, these include the broadcast transmission standards of NTSC in North America and Japan, and PAL or SECAM elsewhere, utilizing the full refresh rates of those standards.
- From 1975, Antenne 2 was available in Italy (regions of Tuscany, Lazio, Lower Veneto and parts of Lombardy and Liguria) using SECAM and since 1983 using PAL until 2003 when the frequencies were sold to various television networks such as Canale Italia and Gruppo Editoriale L'Espresso.
- This was an evolution from older color TV systems (such as PAL or SECAM) fixing the problems of interference between luminance and chrominance, and providing a stepping stone for a future HDTV system.
- In video applications, a vectorscope supplements a waveform monitor for the purpose of measuring and testing television signals, regardless of format (NTSC, PAL, SECAM or any number of digital television standards).
- All current widely deployed color television broadcast standards – NTSC, SECAM, PAL and today's digital standards, and importantly digital image data compression – implement some form of his idea of reducing a signal to a separate luminance with chrominance encoded separately.
- In both cases, the teletext data was transmitted during the vertical blanking interval, the portion of time allocated for the electron beam to return from the bottom of the screen back up to the top between each frame of the image (which corresponds to a transmission time of 25 lines in each field of PAL or SECAM), and each line used conveyed a fixed number of bytes each cycle: 40 bytes for European systems, 32 in the United States.
- When shooting with old cameras, 50 Hz interlaced video (usually used with most forms of PAL and SECAM) can be relatively easily processed to give 25 progressive frames per second, which is the framerate that the PAL/SECAM telecine process also uses.
- PAL and SECAM conversions do agitate, though, with the unpleasant choice between slowing down video (and audio pitch, noticeably) by four percent, from 25 to 24 frames per second, in order to maintain a 1:1 frame match, slightly changing the rhythm and feel of the program; or maintaining original speed by periodically dropping frames, thereby creating jerkiness and possible loss of vital detail in fast-moving action or precise edits.
- However, no comb filter can totally eliminate NTSC artifacts and the only complete solutions to dot crawl are not to use NTSC or PAL composite video, maintaining the signals separately by using S-Video or component video connections instead, or encoding the chrominance signal differently as in SECAM or any modern digital video standard as long as the source video has never been processed using any video system vulnerable to dot crawl.
- In some of these systems, the necessary sync signal was on a separate subcarrier though sometimes the sync polarity is simply inverted, in which case, if used in conjunction with PAL, a SECAM L TV with a cable tuner can be used to partially descramble the signal though only in black and white and with inverted luminance and thus a multi standard TV which supports PAL L is preferred to decode the color as well.
- In France, where the SECAM standard is used in television broadcasting, a teletext system was developed in the late 1970s under the name Antiope.
- The Philips circle pattern is geared towards the PAL colour-coding system, but SECAM versions do exist (for example, it was used by TVP in Poland, MTV in Hungary and TDF in France, without side bars, as well as ERT in Greece, VTV in Vietnam and Télé Sahel in Niger, with side bars).
- SECAM TV uses FM for the chrominance signal, hence ghosting only affects the luma portion of its signal.
- After UNMIK took over the administration of Kosovo in June 1999 and re-employed former RTP staffs, RTK began broadcasting in September 1999 via analog satellite in PAL and SECAM television broadcast standards with a daily two-hour transmission, expanding to four hours per day in November 2000, with programming mainly in Albanian and once-a-day news edition in Serbian and Turkish.
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