.\" @(#)dpcmimage	1.7	12/17/92
.NA DpcmImage
.SD
A universe that does differential pulse code modulation (DPCM).
.DE
.LO "~ptolemy/src/domains/sdf/demo"
.DM SDF Universe
.SV 1.7 "August 19, 1991"
.AL "P. E. Haskell"
.LD
.Ie "image DPCM"
.Ie "DPCM, image"
This universe reads images from a file and performs DPCM compression
on the image sequence.
The difference-coded image sequence is run-length encoded.
.Ie "run length encoding"
.Ie "encoding, run length"
The coded image, final image, and difference
between the original and final images are all displayed.
.pp
The DisplayVideo star needs programs from the Utah Raster Toolkit
.EQ
delim off
.EN
to be in your $path variable to work.
.EQ
delim $$
.EN
These programs are not included with Ptolemy.
The manual page for the DisplayVideo star tells how to
get the Utah Raster Toolkit for free.
.SA
DisplayVideo
ReadImage
Dpcm
RunLen
.ES
