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參數資料
型號: W9961CF
廠商: WINBOND ELECTRONICS CORP
元件分類: 消費家電
英文描述: H.263/H.261 Video Codec
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP208
封裝: 28 X 28 MM, 2.60 MM HEIGHT, PLASTIC, QFP-208
文件頁數: 32/65頁
文件大小: 344K
代理商: W9961CF
W9961CF
- 32 -
Figure 7.5 illustrates a typical circuit for enabling adjustment of contrast and brightness for Y
component, and hue and saturation for CbCr components. The brightness is adjusted after the
contrast adjustment to avoid introducing a varying DC offset due to adjusting the contrast. Hue
adjustment is implemented by mixing the Cb and Cr data:
Cb
= Cb cos
θ
+
Cr sin
θ
Cr
= Cr cos
θ
Cb sin
θ
where
θ
is the desired hue angle. An 11-bit hue adjustment value is used to allow adjustments from 0
°
to 360
°
, in increments of 0.176
°
.
Y
+
-
16
Contrast Value
Brightness Value
16
Y’
Cr
128
Hue Value
SIN
128
Saturation Value
Cr’
Cb’
+
-
+
-
+
-
Cb
COS
Figure 7.5 Hue, Saturation, Contrast, and Brightness Controls
7.3.3.2 Video Output Interface
The built-in TV encoder supports worldwide video standards, including NTSC, PAL-B, D, G, H, N, and
PAL-M. The W9961CF supports two digital video output modes (8-bit YCbCr and 8-bit RGB) and
three analog video output modes (RGB, Composite, and S-Video + Composite) as shown in Table
7.1. Up to one digital video and one analog video can be output simultaneously. Table 7.2 shows
pinout definitions of the video output interface.
Table 7.1 W9961CF Video Output Modes
PWON_15
PWON_3-2
Digital Video Output Mode
Analog Video Output Mode
0
0X
8-bit YCbCr
RGB
0
10
8-bit YCbCr
Composite
0
11
8-bit YCbCr
S-Video + Composite
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