ASX340AT_16 Datasheet, PDF (14/54 Pages) ON Semiconductor – 1/4‐inch Color CMOS NTSC/PAL Digital Image SOC

ASX340AT
NTSC/PAL Test Pattern Generation
There is a built-in standard EIA (NTSC) and EBU (PAL)
color bars to support hue and color saturation
characterization. Each pattern consists of seven color bars
(white, yellow, cyan, green, magenta, red, and blue). The Y,
Cb and Cr values for each bar are detailed in Tables 6 and 7.
Figure 10. Color Pipeline
TABLE 6. EIA COLOR BARS (NTSC)
Nominal Range
White
Y
16 to 235
180
Cb
16 to 240
128
Cr
16 to 240
128
Yellow
162
44
142
Cyan
131
156
44
Green
Magenta
Red
112
84
65
72
184
100
58
198
212
Blue
35
212
114
TABLE 7. EBU COLOR BARS (PAL)
Nominal Range
White
Y
16 to 235
235
Cb
16 to 240
128
Cr
16 to 240
128
Yellow
162
44
142
Cyan
131
156
44
Green
Magenta
Red
112
84
65
72
184
100
58
198
212
Blue
35
212
114
CCIR-656 Format
The color bar data is encoded in 656 data streams. The
duration of the blanking and active video periods of the
generated 656 data are summarized in Tables 8 and 9.
TABLE 8. NTSC
Line Numbers
1−3
4−19
20−263
264−265
266−282
283−525
Field
2
1
1
1
2
2
TABLE 9. PAL
Line Numbers
1−22
23−310
Field
1
1
Description
Blanking
Blanking
Active video
Blanking
Blanking
Active Video
Blanking
Active video
Description
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