NDLI: Subband image coding using a fixed-rate lattice vector quantizer

Content Provider	IEEE Xplore Digital Library
Author	Mohdyusof, Z. Fischer, T.R.
Copyright Year	1995
Description	Author affiliation: Dept. of Electr. Eng. & Comput. Sci., Washington State Univ., Pullman, WA, USA (Mohdyusof, Z.; Fischer, T.R.)
Abstract	We present a fixed-rate lattice VQ (FRLVQ) for subband image coding. The fixed-rate lattice VQ is an extension of the entropy-coded lattice vector quantizer (ECLVQ) [Mohdyusof and Fischer, 1994]. For an error-free channel, image coding using ECLVQ provides competitive performance with other methods. ECLVQ is a variable length coder, hence a single bit error in the encoded bit stream could lead to error propagation resulting in severe degradation in image quality. A fixed-rate lattice VQ is constructed from the ECLVQ by grouping together several vectors as a "macroblock". The macroblock is encoded at a fixed rate, while allowing a variety of encoding rates for each vector in the macroblock. In the event of a transmission error, error propagation is confined to that particular macroblock. In this work we assume the encoded bit stream is transmitted over a binary symmetric channel. The simulation results show that the FRLVQ subband image coding provides competitive performance with other fixed-rate image coding systems. The simulation results also indicate FRLVQ performance degrades gracefully in the presence of channel noise.
Starting Page	101
Ending Page	104
File Size	841082
Page Count	4
File Format	PDF
ISBN	0818673109
DOI	10.1109/ICIP.1995.529049
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-10-23
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image coding Lattices Streaming media Degradation Image quality Protection Government Entropy Quantization Laplace equations
Content Type	Text
Resource Type	Article

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