Precision measurement of waveforms

A machine-implemented method for digital signal processing, comprising:

• obtaining a digital waveform signal from data storage or from conversion of a physical analog signal received from an analog source or captured by a physical analog device;
• determining, from the digital waveform, one or more measuring matrices, each matrix consisting of a plurality of cells, each cell representing a corresponding time slice and frequency bin and having an amplitude corresponding to the signal energy for that frequency bin and time slice;
• identifying two or more maxima cell types in each measuring matrix;
• identifying correlated maxima cell types in the measuring matrices that coincide in time and frequency;
• constructing a precision measuring matrix showing the correlated maxima cells;
• and
• storing, transmitting and/or displaying the precision measuring matrix;
• wherein obtaining, determining, identifying, selecting, storing, transmitting and displaying are implemented using one or more machines.