Patent ID: 9251798
Filing Date: 2016-02-02
CPC Classification: G10L

Claim Text:
1. In an audio encoder, a method of adaptive audio signal coding, the method comprising: categorizing, by a categorizing unit programmed on an encoder, audio signals into high-frequency audio signals and low-frequency audio signals; coding, by a low-frequency signal coding unit programmed on an encoder, the low-frequency audio signals by using a time domain coding manner or a frequency domain coding manner according to characteristics of the low-frequency audio signals; and selecting, by a high-frequency signal coding unit programmed on an encoder, a bandwidth extension mode to code the high-frequency audio signals according to a low-frequency coding manner, characteristics of the audio signals, or both; wherein the selecting the bandwidth extension mode to code the high-frequency audio signals according to the characteristics of the audio signals further comprises: determining that the audio signals are voice signals, and selecting a time domain bandwidth extension mode to perform time domain coding for the high-frequency audio signals; or otherwise, determining that the audio signals are music signals, and selecting a frequency domain bandwidth extension mode to perform frequency domain coding for the high-frequency audio signals.