TY - GEN
T1 - Subband image coding using entropy-coded quantization
AU - Farvardin, N.
AU - Tanabe, N.
PY - 1990
Y1 - 1990
N2 - In this paper we develop two entropy-coded subband image coding schemes. The difference between these schemes is the procedure used for encoding the lowest frequency subband: predictive coding is used in one system and transform coding in the other. Other subbands are encoded using zero-memory quantization. After a careful study of subband statistics, the quantization parameters, the corresponding Huffman codes and the bit allocation among subbands are all optimized. It is shown that both schemes perform considerably better than the scheme developed by Woods and O'Neil [2]. Roughly speaking, these new schemes perform the same as that in [2] at half the encoding rate. To make a complete comparison against the results in [2], we have studied the performance of the two schemes developed here as well as that of [2] in the presence of channel noise. After developing a codeword packetization scheme, we demonstrate that the scheme in [2] exhibits significantly higher robustness against the transmission noise.
AB - In this paper we develop two entropy-coded subband image coding schemes. The difference between these schemes is the procedure used for encoding the lowest frequency subband: predictive coding is used in one system and transform coding in the other. Other subbands are encoded using zero-memory quantization. After a careful study of subband statistics, the quantization parameters, the corresponding Huffman codes and the bit allocation among subbands are all optimized. It is shown that both schemes perform considerably better than the scheme developed by Woods and O'Neil [2]. Roughly speaking, these new schemes perform the same as that in [2] at half the encoding rate. To make a complete comparison against the results in [2], we have studied the performance of the two schemes developed here as well as that of [2] in the presence of channel noise. After developing a codeword packetization scheme, we demonstrate that the scheme in [2] exhibits significantly higher robustness against the transmission noise.
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M3 - Conference contribution
AN - SCOPUS:0025692126
SN - 0819402915
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 240
EP - 254
BT - Proceedings of SPIE - The International Society for Optical Engineering
A2 - Pennington, Keith S.
A2 - Moorhead, Robert J.II
T2 - Image Processing Algorithms and Techniques
Y2 - 12 February 1990 through 14 February 1990
ER -