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Advances in Visual Data Compression and Communication
book

Advances in Visual Data Compression and Communication

by Feng Wu
July 2014
Intermediate to advanced content levelIntermediate to advanced
513 pages
16h 40m
English
Auerbach Publications
Content preview from Advances in Visual Data Compression and Communication
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3.2 Digital Communication 57
16 State
Decoder
DEC
1
16 State
Decoder
DEC
2
Interleaving
y
k
x
k
y
1k
y
2k
Latency: L
1
Latency: L
2
Λ
1
(d
k
) Λ
1
(d
n
)
d
n-L2
Figure 3.6 The decoding of Turbo codes.
evidence it receives from the incoming prior probabilities with the parity information
provided by the code. After a number of iterations, the decoder converges to an
estimate of the transmitted codeword.
The decoder of Turbo codes is shown in Figure 3.6, which is made up of two
elementary decoders (DEC
1
and DEC
2
) in a serial concatenation scheme. The first
elementary decoder DEC
1
is associated with the lower rate R
1
encoder C
1
and yields
a weighted decision. For a discrete
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Publisher Resources

ISBN: 9781482234138