參數(shù)資料
型號: KS0119
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: Multimedia Video(帶傳統(tǒng)RAM-DAC功能的NTSC編碼器)
中文描述: 多媒體視頻(帶傳統(tǒng)的RAM - DAC的功能的NTSC制式編碼器)
文件頁數(shù): 17/47頁
文件大?。?/td> 311K
代理商: KS0119
KS0119 Data Sheet
MULTIMEDIA VIDEO
ELECTRONICS
PAGE 17 OF 50
070595
4. SIGNAL MANIPULATION FUNCTIONS
The NTSC Encoder Unit provides the facilities for the user to control the contrast, hue, color killer and the vertical
blanking period by programming the
Command
Register
B
(
CMDB
) and
Hue
Control
register(
HUE
).
4.1. Hue Control
The chromaticity can be changed by modifying the modulation angle. The entire 360
°
hue range is divided into 264
equal units. To move the hue angle by k units the congruent 83*k MOD 264 should be loaded into the
HUE
register
and bit 7 of
CMDB
register. The
HUE
register will not be transferred to the final
Hue
Control
register until a write to
the
CMDB
register occurs. Therefore, when changing the hue angle, the
HUE
register must be loaded first followed
by a write to the
CMDB
register. The following examples show the value to be programmed into the HUE register
for +5 and -5 degree hue angle:
Examples:
+5 degree Hue angle
-5 degree Hue angle
4.2. Chroma Trap Filter
The luminance path includes a Chroma Trap filter. When this filter is enabled (
CMDB
[4] = 1), the effective bandwidth
is reduced to 2.8 MHz, resulting in a softer picture.
4.3. Color Killer
When bit 3 of the
CMDB
register is set to 1, the chroma data will be removed and the picture will be displayed as
black and white.
4.4. Vertical Blanking
Normally, line 1 to line 9 in field 1 and the second half of line 263 to 272 in field 2 are blanked automatically. However,
if bit 2 of
CMDB
register is 1, the blanking period is extended to the line specified in the
VBLK
register.
k
5
360
264
×
3
=
=
HUE
mod k
83 264
)
mod
249 264
(
)
249
=
=
=
k
355
)
360
264
×
260
=
=
HUE
mod
260 83 264
(
mod
264 81
(
196
+
264
,
)
196
=
=
=
相關PDF資料
PDF描述
KS0122 MULTISTANDARD VIDEO DECODER
KS0123 DIGITAL VIDEO ENCODER
KS0125 Multi-standard Video Encoder(多標準視頻編碼器)
KS0164 Multimedia Audio(波表合成芯片)
KS0165 Multimedia Audio(波表合成芯片)
相關代理商/技術參數(shù)
參數(shù)描述
KS0122 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MULTISTANDARD VIDEO DECODER
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KS0127 制造商:Samsung SDI 功能描述:Digital video encoder & decoder
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