Method and means for reducing noise in television display system
US4408228A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1980 |
| Grant date | Oct 4, 1983 |
| Priority date | — |
| Expiry date | Nov 2, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/52057
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Noise is reduced in the television display of an A trace in an ultrasonic scanner system by integrating digital data representing the magnitude of video signals corresponding to the echos of ultrasonic pulses. The digital integration is accomplished on a point by point basis by summing digital data with stored digital data from previous video signals. Preferably, a capture memory is utilized with a digital summer for integrating the data while another memory periodically receives the integrated data and functions to refresh the television display. In another embodiment, two memories can alternate in capturing the integrated data and in refreshing the display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.