Internal Modules
116
SPRUHI7A – December 2012 – Revised June 2016
Copyright © 2012–2016, Texas Instruments Incorporated
High-Definition Video Processing Subsystem (HDVPSS)
1.2.6.2.7.2.2 LPF
The YUV data from color space converter is applied to the LPF. The LPF is used to bandlimit the signal to
conform to the standard. The LPF comprises of 11 tap symmetric FIR with the programmable coefficients.
Independent coefficients are available for luma and chroma. The luma LPF takes the input from CSC in
s(12.0) and outputs s(12.0). The chroma LPF takes s(11.0) from the CSC (MSB thrown away) and output
s(11.0). The coefficient register format is s(0.7). The sampling rate of the FIR filter is half of clk2x clock.
The LPFs are disabled by default and can be activated by YLPF and CLPF registers. LPF is available only
for the CVBS generation.
Table 1-38. Luma LPF Filter Coefficient
Coefficients
Value
Default
h(0)
h(10)
YLPFC0
0
h(1)
h(9)
YLPFC1
0
h(2)
h(8)
YLPFC2
0
h(3)
h(7)
YLPFC3
0
h(4)
h(6)
YLPFC4
32/128
h(5)
YLPFC5
64/128
Table 1-39. Chroma LPF Filter Coefficient
Coefficients
Value
Default
h(0)
h(10)
CLPFC0
0
h(1)
h(9)
CLPFC1
0
h(2)
h(8)
CLPFC2
0
h(3)
h(7)
CLPFC3
12/128
h(4)
h(6)
CLPFC4
32/128
h(5)
CLPFC5
40/128