Patent ID: 8116460
Filing Date: 2012-02-14
Classification: G10L,H04S

Abstract:
1. Decoder for decoding an encoded bitstream, comprising: a demultiplexer for demultiplexing the encoded bitstream for obtaining a lowband core decoder signal and a plurality of level parameters, the plurality of level parameters being a spectrally coarse representation of a highband envelope of an audio signal, a level parameter from the plurality of level parameters representing a total power in a frequency band of a signal having two channels, the two channels having a set of frequency bands; a lowband core decoder for producing a lowband output signal, wherein the lowband output signal only comprises a lowband of the audio signal and not comprising a highband of the audio signal, the audio signal being a mono signal or a stereo signal; and a high-frequency reconstruction unit for generating a synthetic highband for the audio signal using the lowband output signal and the plurality of level parameters to obtain a spectrally fine representation of the highband of the audio signal and for combining the synthetic highband and the lowband output signal, wherein the decoder is a hardware apparatus.