Method and system for precise time based presentation of recorded medical data
US5467774A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1994 |
| Grant date | Nov 21, 1995 |
| Priority date | — |
| Expiry date | Jun 15, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/336
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The method and system for precise time based presentation of recorded medical data, such as cardiac data, encephalographic data, fetal monitor data or the like, which has been recorded on an ordinary audio cassette tape utilizing an inexpensive presentation device. An off-the-shelf tape transport deck is utilized which operates at an actual presentation speed which varies in a linear fashion in response to variations of a control signal which do not vary by greater than a selected maximum value during a given time period and in a nonlinear fashion in response to variations of a control signal which do vary by greater than the selected maximum value during a given time period. A timing track signal is utilized to determine actual presentation speed and small variations between the desired presentation speed and the actual presentation speed are coupled to a linear control system and utilized to vary the control signal at a rate which does not exceed a first rate. Large variations between the desired presentation speed and the actual presentation speed are coupled to a nonlinear control system and utilized to vary the control signal with respect to time at a constant rate, ensuring s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.