Device and method for identifying stacking and splitting of stenographic keystrokes

A method for analyzing multiple keystrokes in an electronic stenographic recording machine having keys forming stenographic keystrokes when actuated, the method comprising:

• recording a plurality of downward time markers, each of the downward time markers indicating a time when a different one of at least three stenographic keys moves downward past a respective stenographic key registration point;
• recording a plurality of upward time markers, each of the upward time markers indicating a time when a different one of the at least three stenographic keys moves upward past its respective key registration point to register a respective key stroke;
• chronologically sorting the downward time markers;
• determining, within the plurality of sorted downward time markers, a pair of chronologically adjacent downward time markers with a greatest chronological difference therebetween;
• determining an elapsed time for each one of the determined pair of adjacent downward time markers, the elapsed time being defined to start when a respective one of the stenographic keys moves downward past its registration point and to end when the respective one stenographic key moves upward past its registration point;
• determining a percentage of chronological overlap of the determined elapsed times;
• and
• separating the at least three key strokes into at least two separate stenographic keystrokes when the percentage of chronological overlap indicates a lack of correlation among the at least three key strokes.

A computer program product for analyzing multiple keystrokes in an electronic stenographic recording machine having keys forming stenographic keystrokes when actuated, the computer program product comprising:

• a non-transitory storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising:
• recording a plurality of downward time markers, each of the downward time markers indicating a time when a different one of at least three stenographic keys moves downward past a respective stenographic key registration point;
• recording a plurality of upward time markers, each of the upward time markers indicating a time when a different one of the at least three stenographic keys moves upward past its respective key registration point to register a respective key stroke;
• chronologically sorting the downward time markers;
• determining, within the plurality of sorted downward time markers, a pair of chronologically adjacent downward time markers with a greatest chronological difference therebetween;
• determining an elapsed time for each one of the determined pair of adjacent downward time markers, the elapsed time being defined to start when a respective one of the stenographic keys moves downward past its registration point and to end when the respective one stenographic key moves upward past its registration point;
• determining a percentage of chronological overlap of the determined elapsed times;
• and
• separating the at least three key strokes into at least two separate stenographic keystrokes when the percentage of chronological overlap indicates a lack of correlation among the at least three key strokes.

An electronic stenographic recording machine comprising:

• a set of stenographic keys operable to form stenographic keystrokes when actuated;
• a memory;
• a processor;
• a sensor communicatively coupled to at least one of the memory and the processor and operable to:
• sense a depressed state of a first stenographic key in the set of stenographic keys and cause the processor to store a first depression time in the memory;
• sense a depressed state of a second stenographic key in the set of stenographic keys and cause the processor to store a second depression time in the memory;
• sense a released state of the first stenographic key and cause the processor to store a first release time in the memory;
• and
• sense a released state of the second stenographic key and cause the processor to store a second release time in the memory;
• and
• the processor being operable to:
• determine an elapsed depression-release time for each of the first and second stenographic keys;
• determine a percentage of chronological overlap of the elapsed depression-release times;
• and
• separate the first and second key depressions into two separate stenographic keystrokes when the percentage of chronological overlap indicates a lack of correlation between the first and second key depressions.