Patent ID: 9728199
Date: 2017-08-08
CPC Classifications: G10L,H04S

Claim:
1. A method for decoding a time frame of an encoded audio bitstream in an audio processing system, the method comprising: extracting from the encoded audio bitstream a first waveform-coded signal comprising spectral coefficients corresponding to frequencies up to a first cross-over frequency for a time frame; performing parametric decoding at a second cross-over frequency for the time frame to generate a reconstructed signal, wherein the second cross-over frequency is above the first cross-over frequency and the parametric decoding uses reconstruction parameters derived from the encoded audio bitstream to generate the reconstructed signal; extracting from the encoded audio bitstream a second waveform-coded signal comprising spectral coefficients corresponding to a subset of frequencies above the first cross-over frequency for the time frame; interleaving the second waveform-coded signal with the reconstructed signal to produce an interleaved signal for the time frame, and combining the interleaved signal with the first waveform-coded signal.