 - H.264, also known as MPEG-4 AVC (Advanced Video Coding), is a video
compression standard that offers significantly greater compression than its
predecessors. The standard is expected to offer up to twice the compression
of the current MPEG-4 ASP (Advanced Simple Profile), in addition to
improvements in perceptual quality. The H.264 standard can provide
DVD-quality video at under 1 Mbps, and is considered promising for
full-motion video over wireless, satellite, and ADSL Internet connections.
The enhanced compression and perceptual quality of H.264 are obtained by
motion estimation, which minimizes temporal redundancies; intra estimation,
which minimizes spatial redundancies; transformation of motion estimation
and intra estimation into the frequency domain; reduction of compression
artifacts; and entropy coding, which assigns a smaller number of bits to
frequently encountered symbols and a larger number of bits to infrequently
encountered symbols.
| CONTRIBUTORS: |
Molly Ruggles |
| LAST UPDATED: |
08 Jun 2005
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