Patent ID: 8569606

Claim:
An apparatus for synchronizing light signals to an analog music input signal having tempo and amplitude, the apparatus comprising: an analog to digital converter to generate a digital signal equivalent of said analog music input signal; a digital signal decoder to generate an output pulse width modulated signal that is representative of said tempo and said amplitude of said analog music input signal; a light driver that receives said output pulse width modulated signal; and a light that emits light in correspondence with said output pulse width modulated signal received by said light driver, wherein said analog to digital converter comprises: a first resistor ladder network to provide a DC bias to said analog music input signal to generate a DC biased analog music input signal; a second resistor ladder network to generate threshold levels for comparing with said DC biased analog music input signal; an auto threshold scanner coupled to said second resistor ladder network to generate a staircase waveform; and an amplitude comparator to compare said staircase waveform and said DC biased analog music input signal, and wherein said digital signal decoder comprises: an amplitude detector to store current step information of said staircase waveform for which said amplitude comparator outputs a signal corresponding to an instantaneous amplitude of said analog music input signal; a music tempo decoder that receives said current step information to perform an averaging of a plurality of said analog music input signals within a pre-determined time frame to generate a threshold level based on an averaged signal, and compare said threshold level with said instantaneous amplitude of said analog music input signal, so as to output a first pulse width modulated signal; and a music volume decoder that receives said current step information to produce a second pulse width modulated signal that has a duty cycle linearly proportional to said amplitude of said analog music input signal.