A Video Tape / Cassette Recorder, if on hand, can provide a less-than-optimum medium for storing V0 data. A small, two-head recorder may be used with a portable system. Some early VO systems incorporated monitors with intrinsic VCRs. Dynamic otic processes such as Valsalva and Toynbee maneuver effects; pulsatile effusion and TMJ effects can be adequately documented in both VHS and S-VHS formats. Static images, when captured from VTR/VCR, suffer an significant loss of definition. Data indexing is poorly controlled by the VCR revolution counter. As a more desireable contemporary alternative, PCI-based video capture boards on 586/Pentium-based computers can provide 15 frame/second motion capture in a 320X240 pixel field with reasonably good resolution.
Roy F. Sullivan, Ph.D.