David R Wojcik

US Patent:

6631135, Oct 7, 2003

Filed:

Mar 27, 2000

Appl. No.:

09/535707

Inventors:

David R. Wojcik - Morrisville NC

Assignee:

Nortel Networks Limited - St. Laurent

International Classification:

H04L 1226

US Classification:

37039521

Abstract:

Method and apparatus for negotiating quality-of-service parameters for a network connection. A cell rate profile is maintained which includes statistical quality-of-service (QoS) parameter information for each user or group of users of a cell-based communication network, such as an asynchronous transfer mode (ATM) network. A router or similar device makes use of specific parameter values for specific times from the cell rate profile to negotiate appropriate network connections having just the right amount of allocated bandwidth for a given connection. Preferably, the router handles the process completely automatically; however, the cell rate profile can be accessed to provide graphical information to users so that an appropriate choice can be made manually.

US Patent:

45808945, Apr 8, 1986

Filed:

Jun 30, 1983

Appl. No.:

6/509497

Inventors:

David R. Wojcik - Woburn MA

Assignee:

Itek Corporation - Lexington MA

International Classification:

G01P 336

US Classification:

356 28

Abstract:

Apparatus for measuring the velocity of a moving image or object including a first array of sensors extending in a first direction transverse to image motion for sensing a primary set of image elements; a second array of sensors extending generally in the first direction and spaced a known distance from the first array for sensing successive sets of image elements; a device for correlating the primary set of image elements with each of the successive sets of image elements and for producing a correlation level indicating the level of correlation of the primary set with each of the successive sets; means for selecting one of the correlation levels which indicates an optimal level of correlation; and means for determining the time interval between the sensing of the first array of the primary set and the sensing by the second array of the successive set corresponding to the selected correlation level; in addition, the means for correlating may include means for comparing with the primary set each successive set in a plurality of different positions along the first direction and for producing a comparison level indicating the level of comparison of the primary set with each of the successive sets in each of the different positions along the first direction; and means for determining the displacement between the position in which the successive set is sensed and the position corresponding to the indicated comparison level.

US Patent:

46898239, Aug 25, 1987

Filed:

Jan 4, 1984

Appl. No.:

6/568026

Inventors:

David R. Wojcik - Woburn MA
Thomas W. Studwell - South Hamilton MA

Assignee:

Itek Corporation - Lexington MA

International Classification:

G06K 900

US Classification:

382 41

Abstract:

A frame processor for processing digitized image information includes a memory for storing a two-dimensional array of pixels, logic circuits for controlling the writing and reading of information into the memory, an arithmetic and logic unit having two inputs, one of which is coupled to the output of the memory, and a microprocessor for controlling operation of the arithmetic and logic unit and the logic circuits for controlling reading and writing.

US Patent:

47543310, Jun 28, 1988

Filed:

Jan 4, 1984

Appl. No.:

6/568027

Inventors:

David R. Wojcik - Woburn MA
Steven R. Goncalo - Burlington MA

Assignee:

Litton Systems, Inc. - Lexington MA

International Classification:

H04N 514

US Classification:

358160

Abstract:

An analog video signal obtained from a television camera having a 4:3 aspect ratio is converted into a square array of N. times. N square pixels corresponding to the pixel content in the center of the television camera by apparatus which includes an analog-to-digital converter having as its analog input the analog output signal of the television camera and providing a sampled digital data output, the converter having an encode input and a data-ready output in addition to its analog video input and digital data output; a synchronization recovery circuit coupled to the video input and adapted to extract from the composite signal a composite synchronization signal containing line synchronization information, frame synchronization information and field index information, and an interface circuit coupled to the encode input of the analog-to-digital converter and the data-ready output and receiving the data output of the converter for converting the 4:3 aspect ratio of the television camera into a square image corresponding to a square in the center of the screen containing a square array of N by N square pixels.

US Patent:

42323762, Nov 4, 1980

Filed:

Mar 15, 1979

Appl. No.:

6/020937

Inventors:

Donald F. Dion - Burlington MA
David R. Wojcik - Burlington MA

Assignee:

RCA Corporation - New York NY

International Classification:

G11C 1300

US Classification:

365222

Abstract:

A raster display refresh system includes a charge coupled device (CCD) circulating refresh memory for maintaining a display of information on a cathode ray tube (CRT) screen. The X and Y address of picture elements to be changed are stored in raster scan sequence in a small random access memory (RAM). Whenever a picture element address in the data register of the RAM equals the X and Y screen address of the scanning beam of the CRT, a corresponding new picture element signal stored in the RAM is substituted for the old picture element signal previously circulating the CCD refresh memory.

US Patent:

47302127, Mar 8, 1988

Filed:

Jan 16, 1987

Appl. No.:

7/004340

Inventors:

David R. Wojcik - Woburn MA
Richard J. Jones - Winchester MA
James M. Aufiero - Reading MA

Assignee:

ITEK Corporation - Lexington MA

International Classification:

H04N 718
H04N 532

US Classification:

358 83

Abstract:

A fluoroscopic image is processed digitally using a television camera operating at a frame rate of at least 30 frames per second viewing the image and providing an analog video output, a digitizer which digitizes the analog video output to provide digital information representative of the analog signal, a plurality of frame processors which carry out arithmetic and logical operations on the digital image information and are operable at the frame rate of the television camera coupled to the output of the digitizer, a 2-D filter operable at the frame rate of the television camera coupled to said frame processors, a converter and interface to convert digital image information processed in the frame processors and 2-D filter back into an analog signal and television display coupled to the output of the converter for displaying the processed signal.

US Patent:

46806288, Jul 14, 1987

Filed:

Jan 4, 1984

Appl. No.:

6/568013

Inventors:

David R. Wojcik - Woburn MA
Richard J. Jones - Winchester MA
James M. Aufiero - Reading MA

Assignee:

Itek Corporation - Lexington MA

International Classification:

H04N 532

US Classification:

358111

Abstract:

A fluoroscopic image is processed digitally using a television camera operating at a frame rate of at least 30 frames per second viewing the image and providing an analog video output, a digitizer which digitizes the analog video output to provide digital information representative of the analog signal, a plurality of frame processors which carry out arithmetic and logical operations on the digital image information and are operable at the frame rate of the television camera coupled to the output of the digitizer, a 2-D filter operable at the frame rate of the television camera coupled to said frame processors, a converter and interface to convert digital image information processed in the frame processors and 2-D filter back into an analog signal and television display coupled to the output of the converter for displaying the processed signal.