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19.3 Source Coding 431
Source
Encoder
(a)
Source
Decoder
s
y
ŝ
Source
Encoder
(
b)
Source
Decoder
s
C={ c(1),c(2),...,c(N)
}
ŝ
Figure 19.4 Distributed source coding without/with Cloud sources.
viewpoint of Shannon’s information theory, it does not look like source coding. Fur-
thermore, it cannot achieve a good reconstruction under the MSE criteria.
Because Cloud sources are assumed to be available at the receiver, one more rea-
sonable solution should be distributed source coding (DSC). In conventional DSC, as
shown in Figure 19.4a, a correlated source y, called side information, has been iden-
tified at the receiver. Input source s is first coset quantized ...