tailieunhanh - Báo cáo hóa học: "Research Article A Modified Run-Length Coding towards the Realization of a RRO-NRDPWT-Based ECG Data Compression System"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article A Modified Run-Length Coding towards the Realization of a RRO-NRDPWT-Based ECG Data Compression System | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2011 Article ID 703752 8 pages doi 2011 703752 Research Article A Modified Run-Length Coding towards the Realization of a RRO-NRDPWT-Based ECG Data Compression System Hsieh-Wei Lee King-Chu Hung Tsung-Ching Wu and Cheng-Tung Ku Department of Computer and Communication Engineering National Kaohsiung First University of Science and Technology Taiwan Correspondence should be addressed to Hsieh-Wei Lee wei@ Received 9 November 2010 Revised 1 March 2011 Accepted 4 March 2011 Academic Editor Patrick Oonincx Copyright 2011 Hsieh-Wei Lee et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. The wavelet-based approach that combines a reversible round-off nonrecursive discrete periodized wavelet transform RRO-NRDPWT and the set partitioning in hierarchical trees SPIHT scheme is an efficient ECG data compression. However this RRO-NRDPWT-based system suffers from the high complexity of the SPIHT scheme during realization. In this paper a modified run-length coding MRLC algorithm is proposed towards the realization of a RRO-NRDPWT-based ECG data compression system. The MRLC with its regularity and low computational complexity is suitable for hardware implementation but at a cost of compression performance. This sacrifice is compensated by an efficient quantization scheme. By using the MIT-BIH arrhythmia database the experimental results show that the proposed scheme can compete with the SPIHT scheme for a compression ratio CR greater than 8. Hardware simulations are taken using both the Verilog logic simulator with Cadence design platform and a Xilinx FPGA EP2C35F672C6. 1. Introduction An electrocardiogram ECG is a non-invasive modality that senses the electric action of heart motion from the surface of a