Big Book OF AV Europe Edition Page 367 Appendix and Glossary

GLOSSARY 367 Bipolar Type of loudspeaker with drivers mounted on opposite sides of the cabinet, or speaker enclosure. Drivers move in and out together so they remain in-phase. Often used as rear-surround speakers. (Also see: Dipolar) Biwiring The use of two pairs of speaker wire from the same amplifier to separate bass and treble inputs on the speaker. Bit Rate Measured as bits per second, and used to express the rate at which data is transmitted or processed. The higher the bit rate, the more data is processed and, typically, the higher the picture resolution. Digital video formats typically have bit rates measured in megabits-per-second (mbps). (One megabit equals one million bits.) The maximum bit rate for standard DVDs is 11mbps; for over- the-air HDTV broadcasts, it's 19.4mbps. Black Level Describes the appearance of darker portions of a video image. Black is the absence of light, so to create the black portions of an image, a display must be able to shut off as much light as possible. Displays with good black level capability not only produce deeper blacks, but also reveal more details and shading in dark or shadowy scenes. Blu-Ray Blu-Ray discs are designed to display High Definition video and store large amounts of data. A Blu-ray disc can store 25 gigabytes (GB) per layer. Typically, a disc has two layers but its possible for discs to have more. Burn-In Burn-in can occur when a static image - like on-screen video game controls, a scrolling stock or news ticker, or a station logo - remains on-screen for an extended period (generally several hours). Bus (buss) A wiring system that delivers power to various devices Byte An 8-bit word is called a byte. C CableCARD A CableCard is a removable security card available through most cable TV providers. It allows a TV with a compatible CableCard slot to receive digital cable programming, including premium and HD channels, without using a separate set-top box. Cable An assembly of more than one conductor, wire Cardioid Microphone A heart-shaped region where a microphone is most sensitive to sound predominately from the front of the microphone diaphragm and rejects sound from the sides and rear. CATV (Cable Television) A broadband transmission medium, most often using 75-ohm coaxial cable carrying many TV channels simultaneously. Category 5 (CAT5) The designation for 100-ohm unshielded twisted-pair cables and associated connecting hardware whose characteristics are specified for data transmission up to 100mbps. (Part of the EIA/TIA 568A standard.) Category 5e (CAT5e) An enhanced version of CAT5 cable standard that adds specifications for far end crosstalk. (Part of the EIA/TIA 568A standard.) Category 6 (CAT6) The cable standard for Gigabit Ethernet and other interconnect that is backward compatible with Category 5 cable, CAT5e and CAT3. CAT6 features more stringent specifications for crosstalk and system noise. (Part of the EIA/TIA 568A standard.) Center Channel (Speaker) The center channel speaker is used to produce the voices, dialogue, or any other sound effects the director mixes into it. In a home setting, it is preferable to have the center channel speaker either directly on top of, or directly below, your television. It is important that the center channel is voice-matched to the front left and right speakers especially, if not also the rear left and right. This creates a seamless and convincing soundstage for movies.

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