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Rear-projection Television
Rear-projection television
Rear-projection television
(RPTV) is a type of large-screen television display technology. Until approximately 2006, most of the relatively affordable consumer large screen TVs up to 100 in (250 cm) used rear-projection technology. A variation is a video projector, using similar technology, which projects onto a screen. Three types of projection systems are used in projection TVs. CRT rear-projection TVs were the earliest, and while they were the first to exceed 40", they were also bulky and the picture was unclear at close range. Newer technologies include: DLP (reflective micromirror chip), LCD projectors, Laser TV and LCoS
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Sound Bar
A soundbar, sound bar or media bar is a type of loudspeaker that projects audio from a wide enclosure. They are much wider than they are tall, partly for acoustical reasons, but also so that they can be mounted above or below a display device, e.g., above a computer monitor or under a television or home theater screen. Basically in a soundbar cabinet multiple speakers are placed which helps to create surround sound and/or stereo effect.A specimen soundbarContents1 History 2 Advantages and disadvantages 3 Soundbar hybrid 4 Use of Soundbar 5 Soundbases 6 See also 7 ReferencesHistory[edit] Early passive versions simply integrated left, centre and right speakers into one enclosure, sometimes called an "LCR soundbar". Altec Lansing introduced a multichannel soundbar in 1998 called the Voice Of The Digital Theatre or the ADA106. It was a powered speaker system that offered Stereo, Dolby Pro-Logic and AC3 surround sound from the soundbar and a separate subwoofer
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Center Channel
Center channel
Center channel
refers to an audio channel common to many surround sound formats. It is the channel that is mostly, or fully, dedicated to the reproduction of the dialogue of an audiovisual program. The speaker(s) connected to the center channel are placed in the center of and behind the perforated projection screen, to give the effect that sounds from the center channel are coming from the screen. In many home surround sound units, the center channel is positioned above or below the video screen.[1] In the post-production process of filmmaking and video production sound editing, dialogue can be mapped to other speakers when story action and direction require it, such as when the person talking is off-screen, but it is rare that there is vocal content that is completely absent from the center channel.[citation needed] In material without accompanying visuals (e.g
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RCA
The RCA
RCA
Corporation was a major American electronics company, which was founded as the Radio
Radio
Corporation of America in 1919. It was initially a wholly owned subsidiary of General Electric
General Electric
(GE); however, in 1932, GE was required to divest its control as part of the settlement of an antitrust suit. At its height as an independent company, RCA
RCA
was the dominant communications firm in the United States. Beginning in the early 1920s, RCA
RCA
was a major manufacturer of radio receivers, and also developed the first national radio network, the National Broadcasting Company (NBC). It had a leading role in the introduction of black-and-white television in the 1940s and 1950s, and color television in the 1950s and 1960s
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ProScan
Proscan is one brand of the French company Technicolor SA
Technicolor SA
(previously named Thomson SA) with products competing with higher-end electronics. The ProScan name is owned by Technicolor USA, Inc (previously named Thomson Consumer Electronics). The company created television and video products to compete with Sony's Trinitron XBR, Pioneer's Elite, and other electronics brand lines. Competition is focused mainly on price to size ratio. The tagline for ProScan is "So advanced, yet so simple." The Proscan brand superseded the RCA Dimensia
RCA Dimensia
line in the early 1990s after the purchase of RCA by General Electric
General Electric
and lasted into the early 2000s until it was dropped for the RCA Scenium brand. Thomson SA has never manufactured or distributed televisions in the United States labeled Thomson
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Mitsubishi
The Mitsubishi
Mitsubishi
Group (三菱グループ, Mitsubishi
Mitsubishi
Gurūpu, also known as the Mitsubishi
Mitsubishi
Group of Companies or Mitsubishi
Mitsubishi
Companies, and informally as the Mitsubishi
Mitsubishi
Keiretsu) is a group of autonomous Japanese multinational companies in a variety of industries. It is historically descended from the Mitsubishi
Mitsubishi
zaibatsu, a unified company which existed from 1870, founded by Iwasaki Yatarō, to 1947 and was disbanded during the occupation of Japan
Japan
following World War II. The former constituents of the company continue to share the Mitsubishi
Mitsubishi
brand, trademark, and legacy
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Samsung
Samsung
Samsung
(Hangul: 삼성; Hanja: 三星; Korean pronunciation: [samsʌŋ]) is a South Korean multinational conglomerate headquartered in Samsung
Samsung
Town, Seoul.[1] It comprises numerous affiliated businesses,[1] most of them united under the Samsung
Samsung
brand, and is the largest South Korean chaebol (business conglomerate). Samsung
Samsung
was founded by Lee Byung-chul
Lee Byung-chul
in 1938 as a trading company. Over the next three decades, the group diversified into areas including food processing, textiles, insurance, securities and retail. Samsung
Samsung
entered the electronics industry in the late 1960s and the construction and shipbuilding industries in the mid-1970s; these areas would drive its subsequent growth
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Hitachi, Ltd.
Hitachi, Ltd. (株式会社日立製作所, Kabushiki-gaisha Hitachi Seisakusho) (Japanese pronunciation: [çiꜜtatɕi]) is a Japanese multinational conglomerate company headquartered in Chiyoda, Tokyo, Japan. It is the parent company of the Hitachi
Hitachi
Group (Hitachi Gurūpu) and forms part of the DKB Group of companies
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Toshiba
Toshiba
Toshiba
Corporation (株式会社東芝, Kabushiki-gaisha Tōshiba, English: /təˈʃiːbə, tɒ-, toʊ-/[2]), commonly known as Toshiba and stylized as TOSHIBA, is a Japanese multinational conglomerate headquartered in Tokyo, Japan. Its diversified products and services include information technology and communications equipment and systems, electronic components and materials, power systems, industrial and social infrastructure systems, consumer electronics, household appliances, medical equipment, office equipment, as well as lighting and logistics. Toshiba
Toshiba
was founded in 1939 as Tokyo
Tokyo
Shibaura
Shibaura
Denki K.K. through the merger of Shibaura
Shibaura
Seisaku-sho (founded in 1875) and Tokyo
Tokyo
Denki (founded in 1890). The company name was officially changed to Toshiba Corporation in 1978
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Philips
Koninklijke Philips
Philips
N.V. (Philips, stylized as PHILIPS) is a Dutch technology company headquartered in Amsterdam
Amsterdam
currently focused in the area of healthcare. It was founded in Eindhoven
Eindhoven
in 1891, by Gerard Philips
Philips
and his father Frederik
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Plasma Display
A plasma display panel (PDP) is a type of flat panel display common to large TV displays 30 inches (76 cm) or larger
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CRT Projector
A CRT projector
CRT projector
is a video projector that uses a small, high-brightness cathode ray tube as the image generating element. The image is then focused and enlarged onto a screen using a lens kept in front of the CRT face. The first color CRT projectors came out in the early 1950s. Most modern CRT projectors are color and have three separate CRTs (instead of a single, color CRT), and their own lenses to achieve color images. The red, green and blue portions of the incoming video signal are processed and sent to the respective CRTs whose images are focused by their lenses to achieve the overall picture on the screen. Various designs have made it to production, including the "direct" CRT-lens design, and the Schmidt-CRT, which employed a phosphor screen that illuminates a perforated spherical mirror, all within an evacuated "tube." The image in the Sinclair Microvision "flat" CRT is viewed from the same side of the phosphor struck by the electron beam
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Digital Micromirror Device
The digital micromirror device, or DMD, is a micro-opto-electromechanical system (MOEMS) that is the core of the trademarked DLP projection technology from Texas Instruments
Texas Instruments
(TI). The DMD was invented by solid state physicist and TI Fellow Emeritus Dr. Larry Hornbeck in 1987.[1] The DMD project began as the Deformable Mirror
Mirror
Device in 1977 using micromechanical analog light modulators. The first analog DMD product was the TI DMD2000 airline ticket printer that used a DMD instead of a laser scanner. A DMD chip has on its surface several hundred thousand microscopic mirrors arranged in a rectangular array which correspond to the pixels in the image to be displayed. The mirrors can be individually rotated ±10-12°, to an on or off state. In the on state, light from the projector bulb is reflected into the lens making the pixel appear bright on the screen
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SRS Labs
SRS Labs, Inc. was a Santa Ana, California-based audio technology engineering company that specialized in audio enhancement solutions for wide variety of consumer electronic devices. Originally a part of Hughes Aircraft Company,[when?] the audio division developed the Sound Retrieval System technology, and in 1993 was separated off to form SRS Labs, Inc
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Sound Retrieval System
The Sound Retrieval System (SRS) is a patented psychoacoustic 3D audio processing technology originally invented by Arnold Klayman in the early 1980s. (The original SRS patents are US 4866774 , US 4748669  and US 4841572 , which expired between 2006 and 2008. Patents may apply in other countries). The SRS technology applies head-related transfer functions (HRTFs) to create an immersive 3D soundfield using only two speakers, widening the "sweet spot," creating a more spacious sense of ambience, and producing strong localization cues for discrete instruments within an audio mix.[1] SRS is not a Dolby matrix surround decoder but works with normal stereo recordings. Initially Hughes Aircraft, for whom Klayman was doing acoustic consulting at the time, offered a standalone SRS audio processor,[1] as well as licensing the technology to Sony
Sony
and Thomson (RCA) for inclusion in their products
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Surround Sound
Surround sound
Surround sound
is a technique for enriching the sound reproduction quality of an audio source with additional audio channels from speakers that surround the listener (surround channels). Its first application was in movie theaters. Prior to surround sound, standard theater sound systems had three "screen channels" of sound, emitted by loudspeakers located only in front of the audience: at the left, center, and right. Surround sound
Surround sound
adds one or more channels from loudspeakers behind the listener, thus is able to create the sensation of sound coming from any horizontal direction 360° about the listener. There are various surround sound–based formats and techniques, varying in reproduction and recording methods along with the number and positioning of additional channels
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