Abstract: The apparatus and method describes herein shows a system of digitizing analog or digital electronic or optical signals with very high single bit serial digital data streams which digitizing is suitable to automatically adapt the transmission of multiple types of analog and digital signals. The system is especially well suited for allowing the coupling and transmission of signals.

Abstract: The apparatus and method described herein provides for detecting or measuring the relative timing of the audio and video portions of an audio visual program by inspection of the opening and closing of the mouth of a speaker, and comparing that opening and closing to the utterance of sounds associated therewith.

Abstract: This invention is a method and apparatus for synchronization of high quality video like signals. Full sync tip to peak white video is digitized in the preferred embodiment along with oversampling and interpolation so that errors are kept to unexpected low levels. The preferred embodiment is described to pass one or more secondary signal with the video signal in a separate parallel but time related path. The use of the input signal for a reference to allow a fixed delay is also shown.

Abstract: The apparatus and method described herein provides for generating a delayed reference in response to a received reference. The occurrence of a first event in the received reference is detected and a delay period started in response thereto. At the end of the delay period a reset is generated. A delayed version of the received reference is then generated in response to the reset. In addition, a delayed signal is generated to steer a companion delay to the same value.

Abstract: The present invention provides a synchronizing signal separation. In accordance with the present invention, a sync pulse processing circuitry slices a video signal and senses the peaks of the synchronizing pulse. A reference generating circuitry divides the output from the sync pulse processing circuitry into a plurality of reference signals that are compared with the video signal, thereby producing logic level outputs. A sync restoring circuitry combines the logic level outputs to provide precisely reconstructed synchronizing pulses of the video signal. The present invention incorporates different standard functions with superior performance because it may be applied for different types of video signals.

Abstract: This invention is for a reference generator and demodulator for recovering information which has been phase, modulated on (or encoded on) a carrier. The inventive concepts described herein include a novel reference measurement circuit including a sampler and phase measurement circuit to measure the carrier reference's phase and/or frequency relative to a discrete time sampling phase and frequency, and a demodulator reference signal generator to generate properly phased reference signals for use by the phase demodulator circuit. The invention is particularly useful for decoding chroma difference signals of PAL and NTSC television video signals. It is suited to be implemented in digital form, operating on digitized signals thereby deriving all of the benefits normally expected of digital signal processing, including precision, freedom from drift and freedom from alignment. The invention is also particularly well suited to implementation by integrated circuit.

Abstract: An audio synchronizer apparatus having a delay detector for accurately measuring the delay of a video apparatus, coupled with a controllable, variable delay audio delay circuit for accurately delaying an audio frequency signal by substantially the same amount as the video signal delay. The apparatus disclosed can operate successfully even with video delays exceeding one frame, without requiring an auxiliary correlation circuit. The variable audio delay may also contain precise filtering to compensate for adverse effects introduced by the delay.

Abstract: A system and method for high speed video tape reproduction wherein an optical disc player having two read heads located on opposite sides of the master disc is used to scan the individual tracks of the disc and develop electrical signals representing the data stored thereon. The two read heads are configured so that one head scans and reads even numbered tracks of the disc while the second head simultaneously scans and reads odd numbered tracks of the disc, which is being rotated at twice the standard rotational speed. The output electrical signals are then mixed and separated so that all data stored in a first portion of each track is formed into a first stream of electrical signals and all data stored in a second portion of each track is formed into a second stream of electrical signals. The two streams of electrical signals are then processed and delayed, as is necessary, so that the signals can be recorded by a video tape recorder having four write heads located around the circumference of its head drum.

Abstract: The invention described herein provides an apparatus and method for accurately shifting the phase or frequency of a complex signal.

Abstract: A multiple slave video tape reproduction system comprising: a master, including an optical disc player having two read heads located on opposite sides of the master disc for scanning the individual tracks of the disc and developing electrical signals representing the data stored, a timing means for coordinating the output sequence of the developed signals, and a processing means for configuring the developed signals so that they may be recorded onto a video tape; and a plurality of slave recorders, including a head drum, having four write heads located at 90 degree angles to each other around the circumference of the head drum whereby oppositely located heads form an electrically connected head pair, and mechanical and electrical components for moving and controlling the guide drum and tape.

Abstract: An improved device for accurately phase or frequency shifting an input signal is disclosed incorporating a variable resistor extending between at least two known phase shifted values of said input signal.

Abstract: A method and apparatus for transmitting and resynchronizing audio and video signals characterized by the encoding of audio timing signals on the video signal prior to transmission, and the decoding of the audio timing signals from the video signal after transmission. The decoded audio timing signals are compared to timing signals generated from the transmitted audio signal, and a delay factor is generated to represent the relative delay between the transmitted audio signal and the transmitted video signal. Either the transmitted video signal or the transmitted audio signal is then delayed by the amount of the delay factor to resynchronize the two signals.

Abstract: The apparatus and method for receiving one or more audio frequency signals transmitted on a television video signal includes a decoder comprised of a pulse separator to recover modulated pulses from said video signal and a demodulator to demodulate said modulated pulses from said separator to recover said audio signal. Also included is an encoding apparatus and method for encoding modulated pulses responsive to audio signals on a video signal.

Abstract: Noise reduction on a video signal is achieved by an adaptive filter system which is capable of automatic changes in filter parameters. This inventive concept includes an automatic method of independently changing both the width and center frequency of the teeth of a comb type bandpass envelope of the filter, as well as adjusting the amplitude response of the filter, independent of the bandpass characteristics, in order to closely match the filter bandpass response to the power spectrum of the video signal being processed, thus rejecting noise in those portions of the spectrum not being used by the video signal. The filter system herein disclosed also provides an adaptive spatial processing of the video signal thus further improving said signal by enhancing detail in the image and by smoothing low amplitude noise in relatively detail free areas of the picture.

Abstract: Improvements to timebase correction devices utilizing clocked analog delay lines are shown. Problems of clocked analog delay lines such as timing errors in the phase of internal sample and holds with respect to their clock, drifting of the gain and offset, and high frequency noise are corrected by use of external sample and hold circuits, external delays, automatic gain and offset circuits and high frequency preemphasis circuits.

Abstract: High speed serial data bits of a data stream are received, stored, shifted and compared in parallel to bit contents of a known correlation word. For each bit match a known signal change is provided on a common terminal. High speed current or voltage changes on the common terminal are proportional to the number of matching bits and are monitored to detect presence of the correlation word in the received data stream. The circuit has minimum number of components and built-in temperature compensation.

Abstract: The audio synchronizer includes a delay detector for measuring the video delay through a video processing system, such as one or more frame synchronizers, and a variable audio delay controlled by the detector so as to equalize the delays of the video and audio signals.

Abstract: The present disclosure teaches a method and apparatus for reducing noise in an electronic signal. These inventive conceptions include a means for delaying the electronic signal and a comparison means for comparing the delayed signal to the signal in its undelayed condition. Means are provided for processing the signal in response to the comparison means to remove at least part of the noise.

Abstract: A method and apparatus for transmitting and resynchronizing audio and video signals characterized by the encoding of audio timing signals on the video signal prior to transmission, and the decoding of the audio timing signals from the video signal after transmission. The decoded audio timing signals are compared to timing signals generated from the transmitted audio signal, and a delay factor is generated to represent the relative delay between the transmitted audio signal and the transmitted video signal. Either the transmitted video signal or the transmitted audio signal is then delayed by the amount of the delay factor to resynchronize the two signals.