Abstract: An embodiment combines the concepts of image enhancement and pointing to enhance the experience of viewing images by tracking where the viewer is pointing. The result is to make the viewing experience more like viewing the original scene, or to enhance the viewing experience in new ways beyond the original experience, either automatically, or by interacting with a photographer's previously specified intentions for what should happen when the viewer points at a particular portion of an image or images taken by that photographer.

Abstract: An embodiment combines the concepts of image enhancement and gaze tracking to enhance the experience of viewing images by tracking where the viewer is looking. The result is to make the viewing experience more like viewing the original scene, or to enhance the viewing experience in new ways beyond the original experience, either automatically, or by interacting with a photographer's previously specified intentions for what should happen when the viewer looks at a particular portion of an image or images taken by that photographer.

Abstract: An embodiment combines the concepts of image enhancement and gaze tracking to enhance the experience of viewing images by tracking where the viewer is looking. The result is to make the viewing experience more like viewing the original scene, or to enhance the viewing experience in new ways beyond the original experience, either automatically, or by interacting with a photographer's previously specified intentions for what should happen when the viewer looks at a particular portion of an image or images taken by that photographer.

Abstract: A redundant system, such as a redundant-modem system, having a plurality of similar components capable of operating independently of each other. At least one of the components serves as a spare component. The system further includes a plurality of switches connected to the inputs and outputs of the components such that the inputs and outputs of each of the components may be rerouted through the component operating as the spare. When operating as a spare, a component monitors status information received from the other components and detects when one of the other components has failed. When one of the components has failed, the component acting as a spare controls the switches such that the spare component (20b) replaces the failed component.

Abstract: An application-specific integrated circuit (ASIC) for performing a selected one of a plurality of programmable functions on one or more input signals. The ASIC includes a plurality of component circuits (21-28), each for performing a predetermined component function (F.sub.1 -F.sub.8) on a signal supplied thereto, a plurality of component routers (31-36) for selectively coupling together the plurality of component circuits (21-28), and a control processor interface (40) for receiving control signals that control the plurality of component routers (31-36) such that selected component circuits (21-28) are coupled together in a manner by which the predetermined component functions (F.sub.1 -F.sub.8) of the selected component circuits are performed on the input signal in an order necessary to accomplish the selected one of the plurality of programmable functions. An application of the above-described circuit to a signal processing ASIC useful in stand-alone satellite modems is also disclosed.

Abstract: Device for detecting and identifying call progress tones on telephone lines. The application discloses a device for converting auditory call progress tones to visual indications and a novel circuit for identifying and distinguishing call progress tones based on their on-off cadence, if any, along with various alternative embodiments including: (1) a device which converts call progress tones to visual indications as for use by the deaf, (2) a device which is programmed to automatically go off-hook at certain times, detect a tone such as a stuttered dial tone indicating a message waiting, and activate a visual indicator, and (3) the use of a capacitor or rechargeable battery which is periodically refreshed by the device automatically going off-hook and which, while the device is on-hook, provides power required by the device.

Abstract: An analog communication signal such as the signal transmitted over a telephone line is converted to digital form for storage in the memory of a computer. Segments of the digital representation of the signal are analyzed to determine whether or not the signal has uniform frequency components repeating at regular intervals. Detection of such regularly repeating uniform frequency components is useful in an automated telephone system to determine whether a telephone signal consists of voice or a call progress signal.

Abstract: Apparatus for maintaining a transmit radio signal frequency in a predetermined frequency relationship with a received radio signal. A common voltage controlled frequency source serves as an Lo signal generator for both the receiver and transmitter. A reference frequency oscillator is phase compared with a receive IF signal to derive a control voltage for the voltage controlled frequency source. The resulting phase lock loop provides transmit signal frequency control with respect to a received signal.

Abstract: An on-line channel monitor, for measuring E.sub.b /N.sub.O, measures the quality of a communication channel while the channel is in use. The channel monitor employs a soft-decision demodulator so as to compare analog signal levels of an AGC compensated signal in a demodulator with the desired signal level. Deviations, termed pseudo-errors, are counted and the number of counts integrated. The result is employed to drive a meter calibrated in terms of E.sub.b /N.sub.O.

Abstract: The digital demodulator produces an information bearing analog signal which is controlled in peak-to-peak amplitude. The signal is coupled to a soft-decision demodulator which provides a multi-bit output representative of magnitude (polarity and amplitude) of the analog signal at a rate determined by the symbol clock derived from the digital demodulator. Logic means produces a logic signal of a first or second type in response to selected multi-bit outputs of the soft-decision demodulator. A logic output of the first type is produced if either the multi-bit output represents an analog signal of one polarity and amplitude greater than a predetermined amplitude, or if the multi-bit output represents an analog signal of the other polarity and amplitude less than an equal predetermined amplitude of the other polarity. The logic output is coupled to an integrating means which produces a control signal representative of deviations of the logic signal of the first type from 50% duty cycle.