||Stankovic, V., Hamzaoui, R., Saupe, D.
||Fast algorithm for optimal error protection of embedded wavelet codes
||Embedded wavelet codes are very sensitive to channel
noise because a single bit error can lead to an irreversible loss of synchronization
between the encoder and the decoder. Sherwood and Zeger
protected a zero-tree based embedded wavelet code sent through a memoryless
noisy channel by using cyclic redundancy detection codes (CRC)
and channel correction codes. Chande and Farvardin proposed an optimal
joint source-channel allocation strategy for such systems. We show
how to accelerate their algorithm without quality loss. For grey scale test
images of size 512 x 512, our speedup factors ranged from 1.2 to 6 for
total bit rates between 0.25 and 1.0 bits per pixel. Moreover, by using
turbo codes as channel codes, we obtained competitive peak-signal-tonoise
ratio (PSNR) results.