L64105 LSI Logic Corporation, L64105 Datasheet - Page 395

• Manufacturer Part Number: L64105
• Description: Mpeg-2 Audio/video Decoder
• Manufacturer: LSI Logic Corporation

A.1 Video Compression and Decompression Concepts
Appendix A
Video/Audio Compression
and Decompression
Concepts
This appendix provides an overview of MPEG compression and
decompression for audio and video. It contains the following sections:
The MPEG standard defines a format for compressed digital video.
Encoders designed to work within the confines of the standard compress
video information, and decoders decompress it.
The MPEG algorithms for video compression and decompression are
flexible, but generally fit the following criteria:
Section A.1, “Video Compression and Decompression Concepts,”
page A-1
Section A.2, “Audio Compression and Decompression Concepts,”
page A-7
Data rates are about 1 to 1.5 Mbit/s for MPEG-1 and up to 15 Mbit/s
for MPEG-2. The L64105 MPEG-2 decoder is capable of supporting
data rates up to 20 Mbit/s for either MPEG-1 or MPEG-2.
Resolutions are about 352 pixels horizontally up to about 288 lines
vertically for MPEG-1 and 720 x 576 for MPEG-2 (main profile). The
L64105 is capable of resolutions up to 720 x 576 for either MPEG-1
or MPEG-2.
Picture rates are between 24 to 30 pictures per second.
A-1