TY - GEN
T1 - An unequal error protection trellis coding scheme for still image communication
AU - Alajaji, Fady
AU - Al-Semari, Saud
AU - Burlina, Philippe
PY - 1997/12/1
Y1 - 1997/12/1
N2 - The source and channel coding functions of a communication system are usually designed independently of one another. This is justified by Shannon's separation principle (1948), which indicates that no performance loss is suffered if the two functions are thus partitioned. However, Shannon's theorem is an asymptotic result that permits unlimited delay and complexity; given a constraint on complexity/delay, joint source-channel coding may outperform separately designed pairs. In this work, we consider the problem of reliable communication of compressed still grey-level images over very noisy channels. An unequal error protection (UEP) joint source-channel coding scheme is proposed for transmitting discrete-cosine transform (DCT) encoded images over an additive white Gaussian noise (AWGN) channel used in conjunction with coherent M-ary phase shift keying (MPSK) modulation. More specifically, it consists of a sequence maximum a posteriori (MAP) detection scheme that exploits both the channel soft decision information and the statistical image characteristics.
AB - The source and channel coding functions of a communication system are usually designed independently of one another. This is justified by Shannon's separation principle (1948), which indicates that no performance loss is suffered if the two functions are thus partitioned. However, Shannon's theorem is an asymptotic result that permits unlimited delay and complexity; given a constraint on complexity/delay, joint source-channel coding may outperform separately designed pairs. In this work, we consider the problem of reliable communication of compressed still grey-level images over very noisy channels. An unequal error protection (UEP) joint source-channel coding scheme is proposed for transmitting discrete-cosine transform (DCT) encoded images over an additive white Gaussian noise (AWGN) channel used in conjunction with coherent M-ary phase shift keying (MPSK) modulation. More specifically, it consists of a sequence maximum a posteriori (MAP) detection scheme that exploits both the channel soft decision information and the statistical image characteristics.
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U2 - 10.1109/ISIT.1997.613384
DO - 10.1109/ISIT.1997.613384
M3 - Conference contribution
AN - SCOPUS:0030651169
SN - 0780339568
SN - 9780780339569
T3 - IEEE International Symposium on Information Theory - Proceedings
BT - Proceedings - 1997 IEEE International Symposium on Information Theory, ISIT 1997
T2 - 1997 IEEE International Symposium on Information Theory, ISIT 1997
Y2 - 29 June 1997 through 4 July 1997
ER -