Application of M-JPEG compression hardware to dynamic stimulus production.
Inexpensive circuit boards have appeared on the market which transform a normal micro-computer's disk drive into a video disk capable of playing extended video sequences in real time. This technology enables the performance of experiments which were previously impossible, or at least prohibitively expensive. The new technology achieves this capability using special-purpose hardware to compress and decompress individual video frames, enabling a video stream to be transferred over relatively low-bandwidth disk interfaces. This paper will describe the use of such devices for visual psychophysics and present the technical issues that must be considered when evaluating individual products.
Mulligan
J B
JB
NASA Ames Research Center, CA 94035-1000, USA. jbm@vision.arc.nasa.gov
D016248:Computer Storage Devices; D016288:Computer Terminals; D006801:Humans; D008838:Microcomputers; D009039:Motion Perception / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods*; D011601:Psychophysics / Q000379:methods