Patent ID: 6122380
Filing Date: 2000-09-19
Classification: H04N

Abstract:
A circuit for providing stereo audio signals, comprising:an interface circuit coupled to receive an audio signal, said interface circuit providing a first audio input signal and a second audio input signal based on said audio signal;a processor coupled to said interface circuit, said processor executing instruction sequences to cause the processor toa) obtain a sum of said first audio input signal and said second audio input signal to provide a first value,b) obtain a difference of between said first audio input signal and said second audio input signal, and encoding said difference to provide an encoded difference value,c) multiply twice the encoded difference value with twice the first harmonic frequency of a synchronization signal to provide a second value,d) multiply a fundamental frequency of the synchronization signal with a predetermined number to provide a third value, ande) obtain a sum of said first, said second and said third values;whereby the instruction sequences cause the processor to generate a third audio input signal based on said first and said second audio input signals; anda first processing circuit coupled to said processor, said first processing circuit configured to generate a first audio output signal based on said third audio input signal.