title: Application of the Max-Lloyd quantizer for ECG compression in diving mammals.
abstract: 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.
authors.affiliation: Departamento de Física Fundamental y Experimental, Universidad de La Laguna, 38203 La Laguna, Tenerife, Canary Islands, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Rodríguez
authors.forename: A
authors.initials: A
authors.lastname: Ayala
authors.forename: S
authors.initials: S
authors.lastname: Rodríguez
authors.forename: F
authors.initials: F
authors.lastname: Rosa
authors.forename: Mario
authors.initials: M
authors.lastname: Díaz-González
mesh_terms: D000465:Algorithms; D000818:Animals; D004242:Diving / Q000502:physiology*; D004289:Dolphins / Q000502:physiology*; D004562:Electrocardiography; D006801:Humans