The Mathworks, Inc.

Data Translation, Inc.

Philip Borghesani

Thomas Gaudette

Mark E Vrabel

Bruce E Walsh

William Smith

Christine G Hagberg

John Herdrich

Karen Champagne

A method and apparatus executes an automated approach allowing access to a standard shared library without requiring the user to create a custom interface definition for library functions that a user wants to access dynamically using a software application. In accordance with one implementation, in an electronic device, a method of accessing a library function from a dynamic environment includes the step of processing a header file of the library function to create an interface to the library function. The interface to the library function is created in the dynamic environment. The user can invoke the process by calling the function from the shared library, and the automated process takes the necessary steps to execute the function.

Method for using header files to call a shared library from a dynamic environment

A computer based system for displaying and compressing video including a video capture card with a video compressor and a bus interface circuit that acts as a busmaster and outputs uncompressed video and compressed video to a computer bus for display of the uncompressed video on the computer monitor and storage of the compressed video on a memory of the computer. The system also includes a software virtual interrupt generator that uses timer events provided by a computer system service and a transfer status indicator to generate interrupts to initiate transfer of a new block of video; an overlay controller implemented in software that transfers video from the video capture card over the computer bus to a graphics subsystem for display in a window on the computer monitor in an overlay mode; a display controller implemented in software that causes display of uncompressed video from the video capture card or software decompressed video; a software controller that compresses audio in software and sends video data to be compressed across the computer bus to the compressor; a controller that is implemented in software and calibrates startup delay of the audio input subsystem and uses the delay to synchronize the audio and video; and a user interactive input mechanism for adjusting the rates of compression within a range of acceptable rates that varies as a function of the output target medium for compressed video.

Computer based video system

Growing community of inventors

Acton, MA, United States of America

Philip Borghesani