APPARATUS AND METHOD OF GENERATING BANDWIDTH EXTENSION OUTPUT DATA Russian patent published in 2013 - IPC G10L21/02 

FIELD: physics.

SUBSTANCE: apparatus (100) for generating bandwidth extension output data (102) for an audio signal (105) has noise floor measuring device (110), a signal energy characteristic (120) and a processor (130). The audio signal (105) has components in a first frequency band (105a) and components in a second frequency band (105b), the bandwidth extension output data (102) are adapted to control a synthesis of the components in the second frequency band (105b). The noise floor measuring device (110) measures noise floor data (115) of the second frequency band (105b) for a time portion (T) of the audio signal (105). The signal energy characteristic (120) derives energy distribution data (125), the energy distribution data (125) characterising an energy distribution in a spectrum of the time portion (T) of the audio signal (105). The processor (130) combines the noise floor data (115) and the energy distribution data (125) to obtain the bandwidth extension output data (102).

EFFECT: efficient encoding without noticeable artefacts, especially for speech signals.

16 cl, 9 dwg