The digital audio/video simulation facility was constructed to aid in the development of new signal processing algorithms. A new general purpose PDP-11/55 computer is used to process data in non-real-time, but real-time evaluation of the results is supported. Software development was minimized by using the same signal processing modules for one dimensional (audio) and two dimensional (video) signal processing. All programs are well written in a higher level language (C) and can be transported to other computers using the UNIX operating system. The audio portion of the facility supports real time input/output of stereo audio channels at a 50kHz sampling rate. Interactive experiments involving A/B comparisons are available for evaluation of new algorithms. A tape recording illustrates the usefulness of the system.
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