CIP 3250A
ADVANCE INFORMATION
2.10. YUVin Interpolator (LPF 4:4:4)
2.11. YUV Output Low-pass Filter 4:2:2 and 4:1:1
– UV-Interpolation 4:1:1 or 4:2:2
4:4:4
– Y low-pass filter with 7 selectable cutoff frequencies
In order to mix the digital input data with the 4:4:4 video
standard from the analog RGB/YUV input, correctly, the
chroma samples of the digital input have to be interpo-
lated.
– UV low-pass decimation filter 4:4:4 4:2:2/4:1:1 with
5 selectable cutoff frequencies
To meet the bandwidth requirements of different video
standards, such as 4:2:2 or 4:1:1 at various sampling
frequencies, the luma signal (Y) and the chroma signal
(UV) can be lowpass filtered. There are 7 different cutoff
In case of YUV 4:1:1 input from DIGIT 2000, a two stage
interpolation filter is implemented. In the first stage, an
interpolation filter is used, which converts the YUV 4:1:1
standard into the YUV 4:2:2 standard.
2
frequencies selectable for luma, via I C register
<05>LPFLUM and 5 different cutoff frequencies select-
2
able for chroma, via I C register <07>LPFCHR. The
In the second stage, the interpolation is from the YUV
4:2:2 to YUV 4:4:4.
spectra of the luminance filters are shown in Fig. 2–9,
and the spectra of the chrominance filters are shown in
Fig. 2–10.
In the case of YUV 4:2:2 input, only the second stage is
necessary.
2
Refer to I C registers <06>DELAYU, <10>UVFRM3,
and <10>UVFRM1 to choose the correct interpolation
filters (see Fig. 2–2).
Micronas
11
MICRONAS [ MICRONAS ]
