Digital Coding of Waveforms: Principles and Applications to Speech and Video
Digital Coding of Waveforms: Principles and Applications to Speech and Video
Efficient scalar quantization of exponential and Laplacian random variables
IEEE Transactions on Information Theory
IEEE Transactions on Circuits and Systems for Video Technology
Ultrawideband technology in medicine: a survey
Journal of Electrical and Computer Engineering - Special issue on Ultra-Wideband Circuits, Systems, and Applications
Error concealment and post processing for the capsule endoscope
Proceedings of the 7th International Conference on Body Area Networks
Low-complexity video coding for wireless image transmission in capsule endoscopy
BodyNets '13 Proceedings of the 8th International Conference on Body Area Networks
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When designing coding algorithms for the wireless endoscope, achieving good performance with very low complexity is of great importance. This is due to the fact that hardware implementation is much constrained by the small size of the endoscope capsule and available power is also very limited. In this paper, we propose a very low complexity image coder for the wireless endoscope which operates within these constraints, with special emphasis on low bit rate performance. The scheme encodes the captured images frame-by-frame using simple DPCM (Differential Pulse Coded Modulation) coding, combined with multi-rate processing, dead-zone quantization and efficient run-length coding of the quantization indices. Simulation results show that proposed coder is able to meet our objectives.