Abstract: Disclosed herein is a binocular artificial vision system including left and right hand video cameras providing left and right video signals to a stereo correlator providing a correlated distance signal at the output thereof. The left and right hand video cameras have overlapping fields-of-view, the stereo correlator derives a quality of correlation signal as well as a range distance signal from the left and right video signals, and means are provided to vary the effective eyebase of the video cameras in response to the quality of correlation signal.

Abstract: A stereophonic sound system has the conventional components of a stereo pre-amplifier, to receive and amplify left and right audio signals, originating from left and right channel microphones, and feed left and right power amplifiers for left and right loudspeakers and additionally has left and right attack separator circuits (6+18, 8+20) connected to receive input audio signals from the pre-amplifier (70) and acting to separate the attack components from the steady-state components of the input audio signals, the steady-state components being fed to the left and right power amplifiers (42, 44) and the attack components being fed to an attack correlator (30) which compares the arrival times of the attack components from the left and right audio signals and calculates an azimuth angle corresponding to the point of origin (8) of the original sound, an attack distributor (40) is connected to the outputs of the correlator and distributes transient attack signals to one of a series of small power amplifiers (46, 4

Abstract: A serial cross-correlator having a pair of input ports (L and R). One of these ports (L) is connected to a first band-pass filter network (63) which is in turn connected to a digital Hilbert transformer (60). The other of the input ports (R) is connected to a second band-pass filter network (64) which is in turn connected to fixed delay (65). The output of the Hilbert transformer is connected to one input of a multiplier (66) while the output of the fixed delay is connected to the other input of the multiplier; and a low pass filter network (67) is connected to the output of the multiplier. The Hilbert transformer produces a 90.degree.

Abstract: A specially designed ribbon for a ribbon loudspeaker is disclosed which prevents ribbon snaking associated with prior art corregated ribbon. The elimination of snaking enables the use of extremely small gaps between the side edges of the ribbon and the magnetic pole pieces which in turn greatly reduce transient distortion of high fidelity sound. Relatively large amplitude corregations are formed within suspended terminal ribbon portions and substantially smaller amplitude corregations are formed within the suspended centralized ribbon portion.

Abstract: A current limiting capacitor together with a special impedance matching transformer, is inserted between a power amplifier and the input terminals of a ribbon loudspeaker, such transformer having a sharply saturable magnetic core which limits the time integral of the voltage of the audio signal applied to the ribbon of the ribbon loudspeaker to a safe value for providing protection of the ribbon from excessive peak amplitudes.

Abstract: A system for the discontinuous transformation of visual images utilizing a variable delay. The visual image to be transformed is first converted to a time-varying video signal. This signal is then converted to a digital signal which is fed to a delay circuit whose time delay can be instantaneously varied. The exemplary delay circuit shown includes a random access memory which is usedc to store and release the stored digital information as a function of the desired delay. The output of the delay circuit can then be inverted to achieve the transformed visual image.