Video display apparatus

摘要

PCT No. PCT/GB94/01571 Sec. 371 Date Feb. 12, 1996 Sec. 102(e) Date Feb. 12, 1996 PCT Filed Jul. 20, 1994 PCT Pub. No. WO95/02989 PCT Pub. Date Feb. 2, 1995Video display apparatus e.g. for use in biofeedback or in diagnosis is described. Between an audiovisual reproduction unit such as a video cassette player and a television display, the invention provides a signal modifying unit which can cause the television display to change. The amount of change and optionally also its type may depend on the sensing of a user parameter, for example a psychophysiological parameter of the user or patient such as electrodermal activity. The signal modification device is preferably pre-programmed and microprocessor controlled. It may also react to coded signals embedded in the composite video signal recorded on the video cassette.