Patent ID: 9741349
Date: 2017-08-22
CPC Classifications: G10L

Claim:
1. A method for encoding an audio signal, wherein a frequency spectrum of the audio signal is divided into at least a first and a second region, wherein at least the second region comprises a number of bands, and wherein spectral peaks in the first region are encoded by a first coding method, the method comprising: for a segment of the audio signal: determining a relation between an energy of a band in the second region and an energy estimate of the first region; determining a relation between the energy of the band in the second region and an energy of neighboring bands in the second region; determining whether an available number of bits is sufficient for encoding at least one non-peak segment of the first region and the band in the second region; and when the relations fulfill a respective predetermined criterion and the number of bits is sufficient: encoding the band in the second region and the at least one non-peak segment of the first region using a second coding method that is different from the first coding method, and otherwise: subjecting the band in the second region to BandWidth Extension BWE or noise fill.