Method and an apparatus for processing an audio signal

摘要

A method for processing an audio signal is disclosed. The method for processing an audio signal includes frequency-transforming an audio signal to generate a frequency-spectrum, deciding a weighting per band corresponding to energy per band using the frequency spectrum, receiving a masking threshold based on a psychoacoustic model, applying the weighting to the masking threshold to generate a modified masking threshold, and quantizing the audio signal using the modified masking threshold.

主权项

1. A method for processing an audio signal by an encoding device, the method comprising:
frequency-transforming, by a frequency-transforming unit of the encoding device, an audio signal to generate a frequency spectrum; deciding, by a weighting decision unit of the encoding device, a weighting per band corresponding to energy per band using the frequency spectrum; receiving, by a masking threshold generation unit of the encoding device, a masking threshold based on a psychoacoustic model; applying, by a masking threshold generation unit of the encoding device, the weighting to the masking threshold to generate a modified masking threshold; quantizing, by a quantization unit of the encoding device, the audio signal using the modified masking threshold; and deciding a speech property with respect to the audio signal, wherein the step of deciding the weighting per band and the step of generating the modified masking threshold are carried out in a band having the speech property of a whole band of the audio signal.