Abstract: In a computerized method a continuous signal is segmented in order to determine statistically stationary units of the signal. The continuous signal is sampled at periodic intervals to produce a timed sequence of digital samples. Fixed numbers of adjacent digital samples are grouped into a plurality of disjoint sets or frames. A statistical distance between adjacent frames is determined. The adjacent sets are merged into a larger set of samples or cluster if the statistical distance is less than a predetermined threshold. In an iterative process, the statistical distance between the adjacent sets are determined, and as long as the distance is less than the predetermined threshold, the sets are iteratively merged to segment the signal into statistically stationary units.
September 20, 1996
Date of Patent:
November 6, 2001
Digital Equipment Corporation
Brian S. Eberman, William D. Goldenthal
Abstract: A chassis system for housing a plurality of circuit boards, such as PCI standard bus boards, provides a rack-mountable chassis having an open front side and a motherboard with a plurality of board connectors arranged side-by-side with respect to the front end. The boards are mounted in individual frameworks that facilitate ready installation and removal from the chassis. In particular, the chassis includes a plurality of receiving blocks at the bottom rear of the chassis, aligned with each of the motherboard connectors. The receiving blocks receive pivots mounted on the back of each framework. The framework is inserted into, and removed from the front opening of the chassis in an upwardly pivoted position that clears the motherboard connectors and other obstructions in the chassis. The framework is pivoted into and out of engagement with the motherboard when the pivot is located in the receiving blocks. The chassis can include top-mounted tracks. The tracks receive rollers on the framework.
April 27, 1998
Date of Patent:
October 3, 2000
Stratus Computer, Inc.
Willard O. Hoyle, Jr., Robert Craig Abraham, Keith A. St. Pierre, Vincent T. Curran
Abstract: A destination station receives from a network a data packet that is transmitted as a plurality of cells and separately encodes each of the received cells, to produce associated, individual c-bit partial CRC remainders, where c is the number of bits in the CRC remainder associated with the packet. These partial CRC remainders correspond to the respective contributions that the cells make to the packet CRC pattern. The encoder appends the partial CRC remainders to the cells, and the station then stores them in an associated memory and links the individual cells to previously stored cells from the same packet with pointers. Once all the cells of a packet are encoded and stored, the destination station retrieves appended partial CRC remainders from the memory, and provides the remainders to a partial CRC encoder. The encoder manipulates the partial remainders and produces a packet CRC remainder.