Encoding the electrocardiogram details in the host record's bandgap for authorization-dependent ECG quality

In this paper we propose using the ECG bandgap storage area for coding high frequency details of the signal. Authorization-dependent access to these details allows privileged users for high precision analysis, while regular users with an access to standard resolution signal are still able to correctly calculate essential parameters. The proposed algorithm performs limited ECG interpretation, analysis of bandgap properties and respective adjustment of supplementary details. Depending of selected coding bit depth, the algorithm slightly affects the ECG (PRD = 0.51% for 5 bps) or the supplementary details (PRD = 1.16% for 1 bps) The storage space is sufficient for accommodate oversampling details of 50 ms enhancing the signal in selected area (e.g. QRS-end for VLP).