Analog Devices Advantiv ADV7619 Hardware User's Manual page 109

Hardware User Guide
HDMI Automatic CSC Operation
In HDMI mode, the ADV7619 provides an automatic CSC function based on the AVI InfoFrame sent from the source. The flowchart in
Figure 34 shows the mechanism of the ADV7619 auto CSC functionality in HDMI mode.
Note: In the following flowcharts, a red dashed line represents a state that is undefined according to the CEA-861D specification, and
therefore should never happen. In the event that it did somehow occur, the ADV7619 retains the previous colorimetry.
Q[1:0] = 01b
RGB LIMITED RANGE
Y[1:0] = 00b Y[1:0] = 01b
RGB MODE YCbCr MODE
Figure 34. HDMI Auto CSC Flowchart
Y[1:0] = 00b
RGB MODE
START
DETECT QUANTIZATION RANGE
Q[1:0] = xxb?
Q[1:0] = 00b
FALSE
CHECK ITC IN AVI
(ITC = 1?)
TRUE
Figure 35. HDMI Auto CSC Flowchart (Case RGB)
START
DETECT YCbCr/RGB
Y[1:0] = xxb?
Y[1:0] = 10b
YCbCr MODE
Q[1:0] = 10b
RGB FULL RANGE
Rev. A | Page 109 of 204
Y[1:0] = 11b
YCbCr MODE
Q[1:0] = 11b
REMAIN CURRENT CS
OR RGB LIMITED RANGE
UG-237