Patent ID: 7365669

Claim:
A low-delay audio data processing system comprising: a first converter for converting sound into an audio signal; a delta-sigma analog-to-digital converter for receiving the audio signal and for generating a digital sample signal at a high oversampling rate; a decimation filter responsive to the digital sample signal at the high oversampling rate for generating a downsampled signal; an audio data processor being connected to said decimation filter for processing the downsampled signal; an interpolation filter responsive to the processed downsampled signal for generating an upsampled signal; a delta-sigma digital-to-analog converter for receiving a compensated upsampled signal and for generating an analog signal; a second converter for converting the analog signal into a sound signal; an oversampling processor including a low-delay filter interconnected between said analog-to-digital converter and said digital-to-analog converter for processing the digital sample signal at the high oversampling rate with low-delay; and a summer connected to said oversampling processor and to the output of said interpolation filter for generating the compensated upsampled signal.