GDC21D003 Datasheet, PDF (50/77 Pages) Hynix Semiconductor – VSB Receiver

Equalizer Output
GDC21D003
VSB mode
2VSB slicer
4VSB slicer
8VSB slicer
16VSB slicer
MUX
Slicer Output
Figure 6.4.2 VSB Slicer
6.4.2 Training/Data Mode Equalization
The Equalizer can achieve equalization through
three means: it can do adaptation on the binary
training sequence; it do adaptation on data symbols
throughout the frame when the eyes are open; or it
can do adaptation on data when the eyes are
closed(blind equalization). The principal difference
among these three methods is how the error
estimate is generated, and Figure 6.4.3 shows the
difference of training and data mode equalization.
field interval
training sequence
... data
Segment
sync
(4 symbols)
PN511
(511 symbols)
PN63
PN63*
PN63
(63 symbols) (63 symbols) (63 symbols)
data mode
equalization
training sequence mode equalization
training sequence mode equalization
...
Segment
sync
... data
(4 symbols)
data mode equalization
Figure 6.4.3 Training/Data Equalization
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