Method and apparatus for removing quantization effects in a quantized signal

A computer-readable storage medium storing instructions that when executed by a computer cause the computer to perform a method for removing quantization effects from a set of low-resolution quantized samples, the method comprising:

• receiving a time series containing a low-resolution quantized signal which is sampled from a high-resolution signal;
• performing a spectral analysis on the time series to obtain a frequency series for the low-resolution quantized signal;
• selecting a subset of frequency terms from the frequency series which have the largest amplitudes;
• and
• reconstructing the high-resolution signal from the low-resolution quantized signal by performing an inverse spectral analysis on the subset of the frequency terms,
• wherein reconstructing the high-resolution signal facilitates removing the quantization effects from the low-resolution quantized signal.

An apparatus for removing quantization effects from a set of low-resolution quantized samples, comprising:

• a receiving mechanism configured to receive a time series containing a low-resolution quantized signal which is sampled from a high-resolution signal;
• a performing mechanism configured to perform a spectral analysis on the time series to obtain a frequency series for the low-resolution quantized signal;
• a selection mechanism configured to select a subset of frequency terms from the frequency series which have the largest amplitudes;
• and
• a reconstruction mechanism configured to reconstruct the high-resolution signal from the low-resolution quantized signal by performing an inverse spectral analysis on the subset of the frequency terms,
• wherein reconstructing the high-resolution signal facilitates removing the quantization effects from the low-resolution quantized signal.