MB86296 Datasheet, PDF (93/352 Pages) Fujitsu Component Limited. – PCI Graphics Controller Specification

FUJITSU LIMITED PRELIMINARY AND CONFIDENTIAL
The coefficient is specified by the coefficient code in two bits independently by
luminance (Y) signal and chrominance (Cb and Cr) signals. The coefficient is a
symmetric coefficient.
CHLPF_x K0
K1
K2
K3
K4
00
0
0
1
0
0
01
0
1/4
2/4
1/4
0
10
0
3/16
10/16
3/16
0
11
3/32
8/32
10/32
10/32
3/32
Horizontal LPF becomes turning off (through) because of the setting of the
coefficient code "00".
Note:
- In the case of Native RGB mode (NRGB=1), only a setup of CHLPF_Y code
becomes effective.
• Down and Up scaling processing of horizontal direction
Please set bit15-00 of capture scale register (CSC) to do the down and up scaling
processing of horizontal direction.
Horizontal direction is scaled down before writing in VRAM. Horizontal direction is
scaled up after reading from VRAM.
The interpolation filter processing of luminance (Y) signal is done by cubic
interpolation (Cubic Interpolate) method. The interpolation filter processing of
chrominance (Cb and Cr) signal is done by BiLinear interpolation (BiLinear
Interpolate) method. The interpolation filter processing of Native-RGB signal is
done by cubic interpolation (Cubic Interpolate) method.
• Vertical low-pass filter processing
The low-pass filter can be put on the vertical direction as a preprocessing when the
image is scaled down to the vertical direction. Vertical low-pass filter (LPF) can be
set to turning on regardless of the scaling up or down of the vertical direction.
A vertical low-pass filter is composed of the FIR filter of three taps. The coefficient
is specified by the following register.
CVLPF_Y
CVLPF_C
Vertical LPF Luminance element and RGB element coefficient
code
Vertical LPF chrominance element coefficient code
The coefficient is specified by the coefficient code in two bits independently by
luminance (Y) signal and chrominance (Cb and Cr) signals. The coefficient is a
symmetric coefficient.
MB86296S <Coral-PA>
83
Specification Manual Rev0.1