(
)
(
)
(
)
(
)
(
)
(
)
(
)
(
)
350
506
0.35
CULCLP
1024
128
1699
27
0.506
CUUCLP
1024
128
2456
27
506
350
0.506
CVLCLP
1024
128
2456
27
0.35
CVUCLP
1024
128
1699
27
OB
OR
kHz
f
kHz
MHz
MHz
MHz
MHz
kHz
f
kHz
MHz
MHz
MHz
MHz
−
≤ ∆
≤
= −
×
×
= −
= +
×
×
= +
−
≤ ∆
≤
= −
×
×
= −
= +
×
×
= +
6
6
2.75
2.5
( )
1 0.75
z
H z
z
−
−
−
=
−
Internal Modules
120
SPRUHI7A – December 2012 – Revised June 2016
Copyright © 2012–2016, Texas Instruments Incorporated
High-Definition Video Processing Subsystem (HDVPSS)
1.2.6.2.7.3.2 Low-Frequency Pre-Emphasis
The YDbDr from CSC is applied to the LPF for a proper attenuation. The LPF function is already
described in
. The low-pass filtered Dr and Db are then applied to low-frequency pre-
emphasis. The pre-emphasis is implemented by an IIR filter whose transfer function is expressed by:
Then, a limiter clips the DbDr to conform to the maximum deviation requirement specified in SECAM
standard.
shows an example of the limiter configuration.
Figure 1-65. Limiter Configuration