clmvc2(3dm)                                                      clmvc2(3dm)



NAME
     cl_mvc2 - MVC2 scheme in the Compression Library

SYNOPSIS
     #include <dmedia/cl.h>


DESCRIPTION
     The MVC2 (Motion Video Compressor 2) compression algorithm is implemented
     as one of the codecs in the Compression Library (CL).  Its scheme
     identifier is CLMVC2SOFTWARE, and is accessible through the standard CL
     API.  For an overview of the basic library calls and parameters, see
     CLintro(3dm).

     Compression involves a simple block coding heuristic based on various
     perceptual criteria.  The amount of compression is guided by setting the
     following parameters.  In each case, a higher threshold results in more
     compression.

     CLMVC2LUMATHRESHOLD
          Type: CL_RANGE_VALUE
          The threshold used to determine which blocks are encoded as constant
          values.  Range is 0 to 255.

     CLMVC2CHROMATHRESHOLD
          Type: CL_RANGE_VALUE
          The threshold used to determine which blocks are encoded with
          luminance only, or with chroma as well.  Range is 0 to 255.

     CLMVC2EDGETHRESHOLD
          Type: CL_RANGE_VALUE
          The threshold used to determine which blocks are encoded as high
          activity regions.  This value should be at least as large as
          CL_MVC2_LUMA_THRESHOLD.  Range is 0 to 255.

     Decompression may be adjusted with the following parameter.

     CLMVC2BLENDING
          Type: CL_ENUM_VALUE
          This value may be CL_MVC2_BLENDING_OFF or CL_MVC2_BLENDING_ON.
          If blending is enabled, edges of tiles will be smoothed on
          decompression so that blocking artifacts are reduced.


SEE ALSO
     CLintro(3dm)









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