Patent ID: 8788276
Filing Date: 2014-07-22
Classification: G10L

Abstract:
1. An apparatus for calculating bandwidth extension data of an audio signal in a bandwidth extension system, wherein a first spectral band is encoded with a first number of bits and a second spectral band different from the first spectral band is encoded with a second number of bits, the second number of bits being smaller than the first number of bits, comprising: a controllable bandwidth extension parameter calculator for calculating bandwidth extension parameters for the second frequency band in a frame-wise manner for a sequence of frames of the audio signal, wherein a frame comprises a controllable start time instant; and a spectral tilt detector for detecting a spectral tilt in a time portion of the audio signal and for signalling the controllable start time instant for the frame depending on the spectral tilt of the audio signal, wherein at least one of the controllable bandwidth extension parameter calculator and the spectral tilt detector comprises a hardware implementation.