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.........compression techniques such as frame differencing and
spatial patterning are important here. There are several new codecs that
are well suited to this artist's needs. While software MPEG compression
has been popular in the past, the algorithmic redundancy that certain graphical
situations present -- such as full lateral rotation -- make it unsuitable
for situations where lower bandwidths are available.
In this situation, the new Indeo Video Interactive codec, Indeo 4.1 is much
more appropriate. Indeo 4.1 is completely based on hybrid wavelet compression
technology, and will offer significantly better performance that vector-quantization-based
codecs, such as Indeo 3.2. This codec is particularly suited to fullly multiplexed
communications and networked environments since it offers fully scaleable
data throughput and frame rates. Data transfer ranges from as low as 66
KBps up to as high as 400 KBps. For added flexibility, the codec features
built-in transparency support, and real-time multiple independent sprite
positioning. Local window decoding in another feature that makes Indeo 4.1
appropriate to network delivery. Suble shifts in source signal information
can be compensated through the codec's ability to perform real-time modifications
of pedestal, luminance peak levels, and chroma gain. The primary drawback
to the codec is that it is asymetrical, with a 2.5 to 1 encoding/decoding
ratio, using a 90 mhz cpu as a reference.
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