YCrCb - Almost identical to YPrPb. If you connect a YCrCb unit to a YPrPb unit you might have to adjust the color slightly. YCrCb is an older standard uncommon for consumer connections.

DLP - (digital light processor). A technology for video projection, also call DMD (Digital Micro-mirror Device). It is a large chip with about a million tiny mirrors on its surface. The chip can tilt each mirror to vary the amount of light reflected off of it.

DTS - Digital Theatre Sound System. A Dolby proprietary discrete 5.1 channel surround system similar to, but not the same as Dolby Digital AC-3, the DTV standard. DTS is used in cinema presentations and in DVD's.

Interoperability - This refers to the ability of a system or a product to work with other systems or products without special effort on the part of the customer. For example, interoperability would be required for a digital television set to be plugged into a VCR that is plugged into cable with all the components working together.

Bandwidth - The range of frequencies used to transmit the television signal, including picture and sound. Analog television signals have been allocated at 6 Megahertz for each over-the-air channel. Digital channels are allocated the same 6 Megahertz by Industry Canada. However, by the use of digital compression, a combination of up to 5 SDTV programs and/or one HDTV program can be carried in this 6 MHz digital channel.

Must-carry - This refers to the legal obligation of cable companies to carry analog or digital signals of over-the-air local broadcasters.

Compression - A method of reducing the number of bits required to store or transmit programs by the removal of redundant and/or non-critical information in the digital picture and sound. The DTV broadcasting standard for Canada, uses the MPEG-2 video and the AC-3 audio compression coding. Compression allows the delivery of more programs in a single channel.

Bit Rate - The rate at which the data is transmitted, expressed as "bits per second" (bps). The higher the bit rate, the more data that is transmitted, generally resulting in better picture or sound quality. Video data rates are usually expressed as Megabits per second (Mbps, 106) and audio data rates in kilobits per second (kbps, 103).

3:2 pull-down - This is the process of converting a 24 frames/sec image into a 30 frames/sec image. Some line-doublers will reverse this process to acquire the original, and then re-perform it.

4 - 3 - Aspect ratio of traditional NTSC TV screens, with 4 unit width by 3 unit height.

Digital - Digital refers to the circuitry in which data-carrying signals are restricted to one of two voltage levels, corresponding to logic 1 or 0.

Transponder - A satellite channel. There is often one program per transponder. Some transponders are wider than 6 MHz and can carry more than one NTSC program. Several digital channels can fit on one transponder.