Patent ID: 8352279

Claim:
An audio/speech signal encoding and decoding method, comprising: predicting a temporal energy envelope shaping of a high frequency band signal from a low frequency band signal; estimating an energy ratio between the high frequency band signal and the low frequency band signal, and quantizing the energy ratio; sending the low frequency band signal and the quantized energy ratio from an encoder to a decoder; receiving the low frequency band signal and the quantized energy ratio at the decoder; estimating a temporal energy envelope shaping of the low frequency band signal from the received low frequency band signal; decoding the quantized energy ratio between the high frequency band signal and the low frequency band signal; multiplying the temporal energy envelope shaping of the low frequency band signal with the quantized energy ratio between the high frequency band signal and the low frequency to obtain a predicted temporal energy envelope shaping of the high frequency band signal; and obtaining the high frequency band signal according to the predicted temporal energy envelope shaping of the high frequency band signal.