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Skip-field
In video, skip field recording is a process in which only one field (video), field (one half of a video frame, frame) of video is recorded in order to conserve recording media space. For some kinds of recording, the quality loss of not using both fields of video is fairly negligible, it results in the loss of half of possible vertical video resolution and temporal resolution. It was a common method used in early telerecording systems, as well as early and current non-professional/industrial videotape formats such as CV-2000, Cartrivision and V-Cord. See also * Low-definition television Film and video technology {{Filming-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cartrivision
Cartrivision is an analog video tape cartridge format introduced in 1972, and the first format to offer feature films for consumer rental.1972: Cartrivision — The First VCR with Prerecorded Tapes CED Magic, cedmagic.com. Article retrieved 2006-12-22. Cartrivision was produced by Frank Stanton (entrepreneur), Frank Stanton's Cartridge Television, Inc. (CTI), a subsidiary of Avco,"Cartrivision — The First ALL American Home VCR!" LabGuy's World (labguysworld.com). Article last updated 2005-01-09, retrieved 2006-12-22. which also owned Embassy Pictures at the time. Cartrivision was available in the form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Video
Video is an Electronics, electronic medium for the recording, copying, playback, broadcasting, and display of moving picture, moving image, visual Media (communication), media. Video was first developed for mechanical television systems, which were quickly replaced by cathode-ray tube (CRT) systems, which, in turn, were replaced by flat-panel displays of several types. Video systems vary in display resolution, Display aspect ratio, aspect ratio, refresh rate, color capabilities, and other qualities. Analog and digital variants exist and can be carried on a variety of media, including radio broadcasts, magnetic tape, optical discs, Video file format, computer files, and Streaming media, network streaming. Etymology The word ''video'' comes from the Latin verb ''video,'' meaning to see or ''videre''. And as a noun, "that which is displayed on a (television) screen," History Analog video Video developed from facsimile systems developed in the mid-19th century. Early mecha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Field (video)
In video, a field is one of the many still images displayed sequentially to create the impression of motion on the screen. Normally, two fields comprise one video frame in what is known as 2:1 interlacing. 3:1, 4:1 and 5:1 interlacing also exist. When the fields are displayed on a video monitor, they are "interlaced" so the content of one field will be used on all of the odd-numbered lines on the screen, and the other field will be displayed on the even lines. Converting fields to a still frame image requires a process called deinterlacing, in which the missing lines are duplicated or interpolated to recreate the information that would have been contained in the discarded field. Since each field contains only half of the information of a full frame, however, deinterlaced images do not have the resolution of a full frame. Sometimes in interlaced video, a field is called a frame, which can lead to confusion. To increase the resolution of video images, new schemes have been creat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Video Frame
In filmmaking, video production, animation, and related fields, a frame is one of the many '' still images'' which compose the complete ''moving picture''. The term is derived from the historical development of film stock, in which the sequentially recorded single images look like a framed picture when examined individually. The term may also be used more generally as a noun or verb to refer to the edges of the image as seen in a camera viewfinder or projected on a screen. Thus, the camera operator can be said to keep a car in frame by panning with it as it speeds past. Overview When the moving picture is displayed, each frame is flashed on a screen for a short time (nowadays typically , , or of a second) and then immediately replaced by the next one. Persistence of vision blends the frames together, producing the illusion of a moving image. The frame is also sometimes used as a unit of time, so that a momentary event might be said to last six frames, the actual duration of w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telerecording
Kinescope , shortened to kine , also known as telerecording in Britain, is a recording of a television program on motion picture film directly through a lens focused on the screen of a video monitor. The process was pioneered during the 1940s for the preservation, re-broadcasting, and sale of television programs before the introduction of quadruplex videotape, which from 1956 eventually superseded the use of kinescopes for all of these purposes. Kinescopes were the only practical way to preserve live television broadcasts prior to videotape. Typically, the term can refer to the process itself, the equipment used for the procedure (a movie camera mounted in front of a video monitor, and synchronized to the monitor's scanning rate), or a film made using the process. Film recorders are similar, but record source material from a computer system instead of a television broadcast. A telecine is the inverse device, used to show film directly on television. The term originally refe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CV-2000
CV-2000 was one of the world's first home video tape recorders (VTR), introduced by Sony in August 1965. The 'CV' in the model name stood for . This was Sony's domestic format throughout the 1960s. It was the first fully transistorized VCR. The CV-2000 was developed by Sony engineer Nobutoshi Kihara. On its release, the CV-2000D machine was listed for US$695——while a portable version in a more durable case, the CV-2000, was listed for $730—. It used video tape in a reel-to-reel format, meaning the tape had to be manually threaded around the helical scan video head drum. The CV-2000 was one-tenth the weight and price of other analog video recording products of its era. It recorded television programs in black and white using the skip field process, which produced a maximum 200-lines resolution. The tape moved at a speed of 7.5 inches per second. Two different reels were marketed: A reel of video tape listed for about US$22——had 30-minute playtime, and video-tape ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
V-Cord
V-Cord is an analog recording videocassette format developed and released by Sanyo. V-Cord (later referred to as V-Cord I) was released in 1974, and could record 60 minutes on a cassette. V-Cord II, released in 1976, could record 120 minutes on a V-Cord II cassette. The V-Cord II machines were the first consumer VCRs to offer two recording speeds. Appearance The original V-Cord cassette had a large hub and was wound with standard-thickness magnetic tape; V-Cord II used a small hub wound with thin tape, the same thickness later used for VHS-120 and Beta L-750. The cassettes were not rectangular, being tapered at one narrow end. Unlike subsequent formats VHS and Betamax, which loaded with the tape facing front on the long side of the cassette, the V-Cord cartridge was loaded sideways with the narrow side serving as the "front" and the tape coming out the "side". The tape was held in place in the machine by a notch halfway down the right side of the tape, similar to the means b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Low-definition Television
Low-definition television (LDTV) refers to TV systems that have a lower screen resolution than standard-definition television systems. The term is usually used in reference to digital television, in particular when broadcasting at the same (or similar) resolution as low-definition analog television systems. Mobile DTV systems usually transmit in low definition, as do all slow-scan television systems. Sources The Video CD format uses a progressive scan LDTV signal (352×240 or 352×288), which is half the vertical and horizontal resolution of full-bandwidth SDTV. However, most players will internally upscale VCD material to 480/576 lines for playback, as this is both more widely compatible and gives a better overall appearance. No motion information is lost due to this process, as VCD video is not high-motion and only plays back at 25 or 30 frames per second, and the resultant display is comparable to consumer-grade VHS video playback. For the first few years of its existen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
