cl_mvc2(3dm)							  cl_mvc2(3dm)

NAME    [Toc]    [Back]

     cl_mvc2 - MVC2 scheme in the Compression Library

SYNOPSIS    [Toc]    [Back]

     #include <dmedia/cl.h>

DESCRIPTION    [Toc]    [Back]

     The MVC2 (Motion Video Compressor 2) compression algorithm	is implemented
     as	one of the codecs in the Compression Library (CL).  Its	scheme
     identifier	is CL_MVC2_SOFTWARE, 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.

     CL_MVC2_LUMA_THRESHOLD    [Toc]    [Back]
	  Type:	CL_RANGE_VALUE
	  The threshold	used to	determine which	blocks are encoded as constant
	  values.  Range is 0 to 255.

     CL_MVC2_CHROMA_THRESHOLD    [Toc]    [Back]
	  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.

     CL_MVC2_EDGE_THRESHOLD    [Toc]    [Back]
	  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.

     CL_MVC2_BLENDING    [Toc]    [Back]
	  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    [Toc]    [Back]

     CLintro(3dm)


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