This version of VYA defines interfaces for Y,U,V and R,G,B processing
only. As such, the functional categories that it covers are source
decoding (output only), image enhancement and display adaptation. In
practice, some modules will process a single video signal only, e.g.
Y, and others will process multiple video signals, e.g. U,V or R,G,B.
Furthermore, some ports will be dedicated to a specific signal type,
e.g. Y, whereas others ports may allow multiple signal types, e.g.
Y,U,V,R,G,B. VYA therefore allows modules to have any number and type
of video signals at their input ports and at their output ports. Some
typical examples are shown in Table 1.
Table 1:
module input/output examples
input
output
example
(CVBS)
Y,U,V
NTSC decoder
(TS)
Y,U,V
MPEG2 decoder
Y
Y
LTI
U,V
U,V
CTI
Y,U,V
Y,U,V
scan rate conversion
Y,U,V
R,G,B
matrix
R,G,B
R,G,B
contrast
C
C
generic spatial scaler (C = Y or U or V or R or G or B)
