ak8823 AKM Semiconductor, Inc., ak8823 Datasheet - Page 11

• Manufacturer Part Number: ak8823
• Description: Hdtv & Ntsc/pal Multi-format Encoder Sdtv/hdtv X2 Oversampling 5ch Dacs
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
4. Video Signal Filter
signal for SD (Figures below show a 13.5MHz example at the right-end frequency scale when Y signal and Luma signal in 525i
mode are up-sampled to 27MHz).
As for PbPr signal case, the right-end frequency should be scaled to 6.75MHz in 525i / 625i mode, 13.5MHz in 525p / 625p
mode, and 37.125MHz in 1080i / 720p mode respectively.
Filter Selection.
Above is the normal filter for Luminance signal pass, another two types filters, Mild and soft could be selected.
MS0549-E-02
Shown below is an example of normal over-sampling Filter Characteristics for Y /Pb / Pr and RGB signals for HD, and Luma
Similarly, the right-end frequency scale should be read as 27MHz in 525p mode and 74.25MHz in 1080i / 720p respectively.
-0.05
-0.15
-0.25
-0.35
-0.45
-10
-20
-30
-40
-50
-60
0.05
10
-0.1
-0.2
-0.3
-0.4
-0.5
0.1
0
0.000
0
0.000
HD (HDY/HDPbPr) / SD ( SDY )
2.000
Freq. - gain
Freq. - gain
6.000
11
4.000
12.000
6.000
[AK8823]
2006/10