Compression: A method of electronically reducing the number of bits required to store or transmit data within a specified time or space. The video industry uses several types of compression methods but the method adopted for DTV is called 'MPEG2.' Four full-range channels of programming and data can be compressed into the same space required by a single analog channel.

 

Related Words

Compression: 1. An increase in density and pressure in a medium, such as air, caused intermittently by the passage of a sound wave. 2. The region in either air or material in which this occurs.

Non-Lossy Compression: A form of data compression which seeks out chunks of data which are identical, replacing them with markers called keys. In this way, the file is reduced in size, and when it is decompressed . . . View Full Definition

Digital Compression: A process of translating video images into a digital code which takes up less transmission space than the original signal would have. This allows more channels per satellite transponder: typ . . . View Full Definition

Chest Compressions: Chest compressions are often used in conjunction with rescue breathing. Learn the full definition of chest compressions.