Application of the Max-Lloyd quantizer for ECG compression in diving mammals.
This article presents a practical implementation of an ECG compression algorithm using a Max-Lloyd quantizer, to optimize the low resources of an ECG acquisition and transmission system (telemetry system) for dolphins and human divers. The algorithm scheme is based on a first-order differential pulse code modulation (DPCM) and uses a Max-Lloyd quantizer to code the difference between the current and predicted samples. The use of the non-uniform quantizer instead of a uniform quantizer improves the percent root mean-square difference (PRD), thereby producing a low distortion in the reconstructed signals. Due to its low computational complexity, the compression process can be accomplished on-line during the ECG acquisition process.
Rodríguez
M
M
Departamento de Física Fundamental y Experimental, Universidad de La Laguna, 38203 La Laguna, Tenerife, Canary Islands, Spain.
Ayala
A
A
Rodríguez
S
S
Rosa
F
F
Díaz-González
Mario
M
D000465:Algorithms; D000818:Animals; D004242:Diving / Q000502:physiology*; D004289:Dolphins / Q000502:physiology*; D004562:Electrocardiography; D006801:Humans