Method and apparatus for encoding and decoding audio signal using adaptive sinusoidal coding

摘要

A method and an apparatus for encoding and decoding audio signals using adaptive sinusoidal coding are provided. The audio signal encoding method includes the steps of dividing a synthesized audio signal into a plurality of sub-bands, calculating the energy of each sub-band, selecting a predetermined number of sub-bands having a relatively large amount of energy from the sub-bands, and performing sinusoidal coding with regard to the selected sub-bands. Application of sinusoidal coding based on consideration of the amount of energy of each sub-band of the synthesized signal improves the quality of the synthesized signal more efficiently.

主权项

1. A method for encoding an audio signal, comprising:
receiving a transformed audio signal; dividing the transformed audio signal into a plurality of sub-bands; calculating, by a processor, energy of each of the sub-bands; selecting, by the processor, a predetermined number of highest-energy sub-bands; and performing sinusoidal coding with regard to the selected sub-bands, wherein the performing sinusoidal coding with regard to the selected sub-bands includes selecting track positions in the selected sub-bands based on an amount of energy of each sub-band, and performing sinusoidal coding with regard to the tracks.