Quantum Corporation

Nnovia, Inc.

Laurent Aubry

Tain-Shain Lee

Robert Caldeira

An embedded system which stores, controls and retrieves real-time digital signals is configured as a programmable and reconfigurable embedded system. The embedded system interface is capable of handling in real time both continuous and irregular signal formats, such as Digital Video (DV) and MPEG, and stores the received signal in a format optimized for its storage medium. Upon retrieval, the signal is reconstituted back to its original format. In one example, the embedded system can receives and retrieve multiple, simultaneous digital signal data streams for a variety of digital equipment, such as digital video recorders.

Apparatus and method for storing and retrieving digital real time signals in their native format

A peak detector samples and holds amplitudes of pulses of a servo burst and includes a master peak detector for following a portion of a rising edge of each pulse until a peak amplitude is reached, and for decaying rapidly at a falling edge of each burst following the peak until a rising edge of a subsequent burst is intercepted at a point of interception, and for generating a control window extending from the point of interception of a rising edge to a peak value of each subsequent pulse; a slave peak detector enabled by the control window of the master detector for following the portion of the rising edge of each burst from the point of interception to the peak value, and for holding the peak value reached by the master detector during the control window, a holding circuit responsive to the slave detector and having a first, rapid time constant for rapidly acquiring a peak value of at least one initial peak of the burst, and having a second, slower time constant for adjusting the initially acquired peak value in light of subsequent peak values of the burst; and, a switching circuit for automatically switching the holding circuit from the first time constant to the second time constant.

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Sunnyvale, CA, United States of America

Laurent Aubry