The ECG signal contain base line wander noise (0.5 to 0.6Hz), power line interference(50Hz) and EMG noise(above
100Hz). High pass filter can be used to remove base line wander noise with cutoff frequency of 0.6 Hz.50 Hz power line
interference can be removed using band stop filter. QRS detection is done using differentiation method. Scilab. is used for
performing signal processing task of removing common noise in ECG signal