Michael A Cooper-Hart

Title: Michael A Cooper-Hart: Innovator in Conversational Video Technology

Introduction

Michael A Cooper-Hart is an accomplished inventor based in Cupertino, CA. He holds a total of 5 patents that showcase his innovative contributions to technology, particularly in the realm of video communication.

Latest Patents

One of his notable inventions is the Conversational Video Phone. This improved video phone transmits a source image over a standard telephone line in conjunction with audio voice signals. The unique initialization protocol allows asynchronous transmission with a short format. The protocol format provides for a hardware preamble for synchronizing a receiver clock, a software preamble for identifying the video image and disabling the audio, automatic gain control adjustment data, and amplitude calibration data. The audio portion is disabled by coupling a capacitor across the telephone to effectively short the telephone. The telephone is placed across a bridge circuit, which is provided with switches to balance the bridge in both the telephone audio and video modes. The transmitted and received signals pass through the same delay equalization circuit, ensuring that half the equalization is done before transmission, with the remaining half being done after reception. Input and output selectors allow the same circuit to be used. The digital signals are level shifted from 5 volts to 10 volts prior to being converted into analog, and then are level shifted down again to reduce the effects of DC offset. The digital and analog voltage supplies are coupled together with a resistor and diode, and a capacitor is coupled between the analog supply and ground to combine the reset and voltage supply functions. An RC circuit providing 180 degrees of phase shift is coupled to the crystal oscillator to produce a clock that is locked into the series resonant frequency of the oscillator. The camera and the rest of the circuitry are turned on and off by a switch coupled to a panel that can be slid in front of the camera, thus providing for the automatic protection of the camera lens when the system is switched off.

Career Highlights

Throughout his career, Michael has worked with notable companies such as Luma Telecom Incorporated and Mitsubishi Denki Kabushiki Kaisha. His experience in these organizations has contributed to his expertise in developing innovative communication technologies.

Collaborations

Michael has collaborated with talented individuals in the field, including Lawrence D Emmons and James S Mackley. Their combined efforts have further advanced the development of video communication technologies.

Conclusion