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The DVD (digital versatile disc) format was introduced in 1996 and has since overtaken VHS in sales and rentals. Major U.S. retailers Circuit City and Best Buy stopped selling VHS tapes in 2002 and 2003, respectively. Many films released to theaters from 2004 onwards have later been released only on DVD and not on VHS, and many other new feature films are being released solely on DVD. Moreover, most television programs released as box sets are for sale in DVD format only. Commentators predict that 2006 will be the final year of new releases o ...

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VHS, VHS - Technical details, VHS - Variations, VHS - Signal Standards, VHS - Tape Lengths, VHS - VHS vs. Betamax, VHS - DVD and the decline of VHS, VHS - List of notable VHS companies

Read more here: » VHS: Encyclopedia II - VHS - DVD and the decline of VHS

As mentioned, VHS was the winner of a protracted and somewhat bitter format war during the early 1980s against Sony's Betamax format. Since Betamax was widely perceived at the time as the better format, it is often stated that VHS' eventual victory was a victory of marketing over technical excellence. In fact, however, the root causes of VHS' victory are somewhat more complex. Betamax held an early lead in the format war, offering some technical advantages, but by 1980 VHS was gaining due to its longer tape time (3 hours maximum, compared to ...

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VHS, VHS - Technical details, VHS - Variations, VHS - Signal Standards, VHS - Tape Lengths, VHS - VHS vs. Betamax, VHS - DVD and the decline of VHS, VHS - List of notable VHS companies

Read more here: » VHS: Encyclopedia II - VHS - VHS vs. Betamax

The DVD format was introduced in 1997 and has since overtaken VHS in sales and rentals. Major U.S. retailers Circuit City and Best Buy stopped selling VHS tapes in 2002 and 2003, respectively. Many films released to theaters from 2004 onwards have later been released only on DVD and not on VHS, and many other new feature films are being released solely on DVD. Moreover, most television programs released as box sets are for sale in DVD format only. Commentators predict that 2006 will be the final year of new releases o ...

See also:

VHS, VHS - Technical details, VHS - Variations, VHS - Signal Standards, VHS - Tape Lengths, VHS - VHS vs. Betamax, VHS - DVD and the decline of VHS, VHS - List of notable VHS companies

Read more here: » VHS: Encyclopedia II - VHS - DVD and the decline of VHS

Permanently installed screens can often be found in venues that are used for continuous visual presentations, such as movie theaters. These can be pre-assembled or assembled on the spot. Pull-down screens are a often used in multipurpose spaces where permanently installed screen would require too much space. These commonly use painted fabric that is rolled in the screen case when not u ...

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Projection screen, Projection screen - Screens by installation type, Projection screen - Home theater screens and gain, Projection screen - Screen geometry and optics, Projection screen - Image brightness and contrast

Read more here: » Projection screen: Encyclopedia II - Projection screen - Screens by installation type

Square-shaped screens used for overhead projectors sometimes double as projection screens for digital projectors in meeting rooms, where space is scarce and multiple screens can seem redundant. These screens have an aspect ratio of 1:1 by definition. Other popular aspect ratios include 4:3 and a widescreen ratio of 16:9, which are often used as dedicated data projection and home cinema use, respectively. Most image sources are designed to project a perfectly rectangular image on a flat screen. Optics designed for a curved screen will result in ...

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Projection screen, Projection screen - Screens by installation type, Projection screen - Home theater screens and gain, Projection screen - Screen geometry and optics, Projection screen - Image brightness and contrast

Read more here: » Projection screen: Encyclopedia II - Projection screen - Screen geometry and optics

VHS can record and play back all varieties of analogue television signals in existence at the time VHS was devised. However, a machine must be designed to record a given standard. Typically, a VHS machine can only handle signals of the country it was sold in. The following signal varieties exist in conventional VHS: PAL/625/25 (most of Western Europe, many parts of Asia and Africa) SECAM/625/25 (SECAM, French variety) MESECAM/625/25 (most other SECAM countries, notably Eastern Europe and Middle East) NTSC/525/30 (Most parts of North and South America, Japan, South Korea) See also:

VHS, VHS - Technical details, VHS - Variations, VHS - Signal Standards, VHS - Tape Lengths, VHS - VHS vs. Betamax, VHS - DVD and the decline of VHS, VHS - List of notable VHS companies

Read more here: » VHS: Encyclopedia II - VHS - Signal Standards

MPEG-2 - DVD. Additional restrictions and modifications of MPEG-2 on DVD are: Resolution 720 × 480, 704 × 480, 352 × 480, 352 × 240 pixel (NTSC) 720 × 576, 704 × 576, 352 × 576, 352 × 288 pixel (PAL) Aspect ratio (image) (Display AR) 4:3 16:9 (2.21:1 also specified but little if ever used) Frame rate 29.97 frame/s (NTSC) 25 frame/s (PAL) No ...

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MPEG-2, MPEG-2 - The standard, MPEG-2 - Video coding simplified, MPEG-2 - Audio encoding, MPEG-2 - Profiles and Levels, MPEG-2 - DVD, MPEG-2 - DVB, MPEG-2 - ATSC, MPEG-2 - ISO/IEC 13818, MPEG-2 - Patent holders

Read more here: » MPEG-2: Encyclopedia II - MPEG-2 - Profiles and Levels

The situation with worldwide digital television is much simpler by comparison. All current digital television systems are based on the MPEG-2 multiplexed data stream standard, and use the MPEG-2 video codec. They differ significantly in the details of how the MPEG stream is converted into a broadcast signal, in the video format prior to encoding (or alternately, after decoding), and in the audio format. This has not prevented the creation of an international standard that includes both ...

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Broadcast television system, Broadcast television system - Analogue television systems, Broadcast television system - Frames, Broadcast television system - Viewing technology, Broadcast television system - Hidden signalling, Broadcast television system - Interlacing, Broadcast television system - Image polarity, Broadcast television system - Modulation, Broadcast television system - Audio, Broadcast television system - Evolution, Broadcast television system - ITU identification scheme, Broadcast television system - Table of world TV systems, Broadcast television system - Digital television systems, Broadcast television system - Digital television systems modulation, Broadcast television system - ATSC, Broadcast television system - DVB-T

Read more here: » Broadcast television system: Encyclopedia II - Broadcast television system - Digital television systems

Commodore 64 peripherals - Serial communications. Likewise, because Commodore offered a number of inexpensive modems for the C64, the machine also helped popularize the use of modems for telecommunications. In the United States, Quantum Computer Services (later America Online) offered an online service called Quantum Link for the C64 that featured chat, downloads, and online games. In the UK, Compunet was a very popular online service for C64 users (requiring special Compunet modems) from 1984 to the early 1990s. ...

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Commodore 64 peripherals, Commodore 64 peripherals - Storage, Commodore 64 peripherals - Floppy disk drives, Commodore 64 peripherals - Tape drives, Commodore 64 peripherals - Hard Drives and expansions, Commodore 64 peripherals - Input/Output, Commodore 64 peripherals - Serial communications, Commodore 64 peripherals - RAM expansions, Commodore 64 peripherals - Input devices, Commodore 64 peripherals - Other peripherals, Commodore 64 peripherals - Notes

Read more here: » Commodore 64 peripherals: Encyclopedia II - Commodore 64 peripherals - Input/Output

The Commodore 1701 and 1702 were 13-inch (33 cm) color monitors for the C64 which accepted as input either composite video or separate chrominance and luminance signals, similar to the S-Video standard, for superior performance with the C64. Early in the Commodore 64's life, Commodore released several niche hardware enhancements for sound manipulation. These included the "Sound Expander", "Sound Sampler", "Music Maker" overlay, and External music keyboard. The Sound Expander and Sound Sampler were both expansion cartridges, but had li ...

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Commodore 64 peripherals, Commodore 64 peripherals - Storage, Commodore 64 peripherals - Floppy disk drives, Commodore 64 peripherals - Tape drives, Commodore 64 peripherals - Hard Drives and expansions, Commodore 64 peripherals - Input/Output, Commodore 64 peripherals - Serial communications, Commodore 64 peripherals - RAM expansions, Commodore 64 peripherals - Input devices, Commodore 64 peripherals - Other peripherals, Commodore 64 peripherals - Notes

Read more here: » Commodore 64 peripherals: Encyclopedia II - Commodore 64 peripherals - Other peripherals

The National Television System Committee was established in 1940 by the Federal Communications Commission (FCC), in the United States, to resolve the conflicts which had arisen between companies over the introduction of a nationwide analog television system in the U.S. The committee in March 1941 issued a technical standard for black and white television. This built upon a 1936 recommendation made by the Radio Manufacturers Association (RMA) that used 441 lines. With the advancement of the vestigial sideband technique for broadcasting that i ...

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NTSC, NTSC - History, NTSC - Technical details, NTSC - Refresh rate, NTSC - Color encoding, NTSC - Transmission modulation scheme, NTSC - Quality problems, NTSC - Variants of NTSC, NTSC - History of the NTSC signal, NTSC - The current state of NTSC III, NTSC - Vertical Interval Reference, NTSC - Countries and territories that use NTSC, NTSC - North America, NTSC - Central America and the Caribbean, NTSC - South America, NTSC - Asia, NTSC - The Pacific, NTSC - Indian Ocean, NTSC - Middle East

Read more here: » NTSC: Encyclopedia II - NTSC - History