Haptic feedback system

A method for operating a haptic waveform storage system, the method comprising:

• generating a sensing signal including tactile texture information by measuring a target object;
• calculating a basic frequency based on a rising time of the sensing signal;
• extracting an envelope by setting a basic period corresponding to a reciprocal number of the basic frequency and by extracting a point having highest intensity from the sensing signal every basic period;
• and
• storing haptic waveform information including information about the basic frequency and the envelope in a library storage unit.

A haptic feedback system comprising:

• a haptic waveform storage system configured to generate haptic waveform information from a target object and store the haptic waveform information in a library storage unit;
• and
• a haptic waveform generation system configured to generate a tactile texture waveform based on the haptic waveform information stored in the library storage unit,
• wherein the haptic waveform information includes information about a basic frequency calculated from a sensing signal measured from the target object and an envelope extracted from the sensing signal,
• wherein the haptic waveform storage system is configured to calculate the basic frequency based on a rising time of the sensing signal and generate the haptic waveform information including information about the basic frequency and the envelope, and
• wherein the haptic waveform generation system is configured to generate a rendered waveform signal by generating a sinewave having the same frequency as the basic frequency and combining the sinewave with the envelope, and generate the tactile texture waveform based on the rendered waveform signal.