| 释义 |
MPEG-2 The ISO/IEC International Standard (IS 13818) for digital television (DTV). MPEG-2 was conceived as an encoding and compression standard for broadcast television based on interlaced scanning of images at 720 × 480 pixels at a rate of 30 frames per second (fps). Although MPEG-2 supports compression rates as high as 200:1, it is much more bandwidth-intensive (4–100 Mbps) than MPEG-1. MPEG-2, however, provides much better resolution and image quality. MPEG-2 is used in direct broadcast satellite (DBS) services and is the compression technique of choice in a convergence scenario. MPEG-3, designed for high definition television (HDTV) application, was folded into MPEG-2. See also bandwidth, broadcast television, compression, convergence, DBS, DTV, fps, HDTV, IEC, interlaced scanning, ISO, MPEG, MPEG-1, and resolution. |