Glossary of Terms for DVD Players
An audio Digital-to-Analog Converter is a device that changes digital audio pulses into analog signals, allowing audio to play through devices such as TVs and speakers. The higher the audio DAC rate, the better the sound.
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A dialogue enhancer is a feature that raises the volume of the center channel, distinguishing dialogue from background noises.
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Composite Video Also called baseband video or RCA video, is the analog waveform that conveys the image data in a conventional National Television Standards Committee (NTSC) television signal. Composite video contains chrominance (hue and saturation) and luminance (brightness) information, along with synchronization and blanking pulses, all together in a single signal.
S-Video (Super-Video, sometimes referred to as Y/C Video) S-video uses a special 5-pin connector in which the luminance signal and the chrominance signal are transmitted separately to achieve superior picture clarity. The luminance signal (Y) carries brightness information, which defines the black and white portion, and the chrominance signal (C) carries color information, which defines hue and saturation.
Component Video each color is maintained in a separate channel. As with RGB (red, green, and blue) Levels of R, G, and B can each range from 0 to 100% of full intensity. Each level is represented by the range of decimal numbers from 0 to 255 (256 levels for each color) and converted to YUV (Y, Cr, Cb) to obtain any color in the visible spectrum.
Coaxial Cable One physical channel that carries the signal surrounded (after a layer of insulation) by another concentric physical channel, both running along the same axis. The outer channel serves as a ground. Many of these cables or pairs of coaxial tubes can be placed in a single outer sheathing and, with repeaters, can carry information for a great distance. Depending on the carrier technology used and other factors, twisted pair copper wire and optical fiber are alternatives to coaxial cable.
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Parental control gives adult users the ability to use passwords to regulate TV programs available to children.
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Progressive scan is a technique used to paint an image on the screen one line at a time.
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A remote control is a hand-held keypad used to operate a device from a distance.
Types
Standard Remote Control: This remote control features functions such as channel selection, volume control, and power.
Advanced Remote Control: This remote control operates multiple devices within the same brand.
Universal Remote Control: This remote control operates multiple devices across multiple brands.
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Screen size is the measure from bottom corner to opposite top corner of the viewable screen of a device.
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A Video Digital-to-Analog Converter is a device that changes outside digital pulses into analog signals, allowing images to be displayed. The higher the Video DAC rate, the better the image.
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The Video Standard describes the resolution and frame rate of a device.
Types
NTSC: The National Television System Committee Standard has a fixed vertical resolution of 525 lines and a frame rate of 30 frames per second.
PAL: The Phase Alternation by Line Standard has a fixed vertical resolution of 625 lines and a frame rate of 25 frames per second.
SECAM: The Systeme Electronique Couleur Avec Memoire Standard has a fixed vertical resolution of 625 lines and a frame rate of 25 frames per second.
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