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Apparatus and Method for Calculating Bandwidth Extension Data Using a Spectral Tilt Controlling Framing
Apparatus and Method for Calculating Bandwidth Extension Data Using a Spectral Tilt Controlling Framing
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机译：使用频谱倾斜控制成帧计算带宽扩展数据的设备和方法
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摘要
An apparatus for calculating bandwidth extension data of an audio signal in a bandwidth extension system, in which 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, has 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. Each frame has a controllable start time instant. The apparatus additionally includes a spectral tilt detector for detecting a spectral tilt in a time portion of the audio signal and for signaling the start time instant for the individual frames of the audio signal depending on spectral tilt.
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