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from the main signal in adder A'. And since the sub-
signal path operation is exactly the same as during
recording
mode, the
decoding and encoding
characteristics complement each other. Further-
more, the anti-saturation P and spectral de-skewing
characteristics during
decoding are the exact
R E C I N
P . B . I N
opposite
of
the
conesponding
characteristics
during encoding. Consequently, a flat frequency
response is maintained at all levels after all phases
of the encoding and decoding opperations are
completed.
R E C O U T
P B . O U T
Spectral
de-skewing
lst processor (high levet stagol
2nd processor (low level stagel
Inverter ii
salgelenR
I
Inverter
| |
saruralton Ft
i
Adder A
r\
: I
l-l
Adder A'
Overchoot
Amp. B
suppressor C
r l
l l
t l
t l
g l
rl
t l
t l
ii
t l
l l
t l
t l
r l
FiS. t-ZS
Block diagram for encoding operation
2nd procesor (low lanel stagel
lst processor (high lovel stagel
Adder A'
lnverter
Anti-
saturation P
Adder A
Overshoot
Overshoot
suppressor C Amp. I
C' Amp. B'
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
1 6
s c F - |
R 4 c 6
Overshoot
Amp. B' suppressor
g):.,!-
,thln L=
iJn""tirier
E, Amp. D,
s c F - 2
s c F - |
i- tl -l[}r*
t +
Amp. D' Rectifier E'l
+
J || -l*L
;"".iri"reE
Fig. 1-26
Block diagram for decoding operation
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