A system and method for intelligent decoded picture buffering is described. The PSE has an auto-zero circuit for comparing a monitored output current of the PSE with the current limit threshold to control the output of the PSE. A second step of the method may be to design a plurality of upper metal layers above the first metal layer in response to a custom design created after the first fabricating has started, the upper metal layers interconnecting a plurality of the cells to form an electrostatic discharge clamp at a power domain crossing. The audio recording apparatus then changes the place where the encoded data is recorded to the new audio file. One embodiment of the method can include predicting sudden cardiac death in a patient being monitored for sleep apnea by acquiring respiration data and electrocardiogram data from the patient and analyzing the respiration data and the electrocardiogram data to determine a correlation between sleep apnea and sudden cardiac death.