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CN105359210A FDNS应用前实现将MDCT频谱衰落到白噪声的装置及方法 有权

FDNS应用前实现将MDCT频谱衰落到白噪声的装置及方法
摘要：
提供一种用于解码编码音频信号以获得重建音频信号的装置。该装置包含用于接收包含关于编码音频信号的音频信号频谱的多个音频信号样本的信息的一个或多个帧的接收接口(1210)，及用于产生重建音频信号的处理器(1220)。处理器(1220)用于在当前帧不由接收接口(1210)接收的情况下或在当前帧由接收接口(1210)接收但被损毁的情况下，通过将修改的频谱衰落至目标频谱来产生重建音频信号，其中修改的频谱包含多个修改的信号样本，其中针对修改的频谱的每个修改的信号样本，修改的信号样本的绝对值等于音频信号频谱的音频信号样本中的一个的绝对值。此外，处理器(1220)用于在一个或多个帧中的当前帧由接收接口(1210)接收的情况下及在由接收接口(1210)接收的当前帧未被损毁的情况下，不将修改的频谱衰落至目标频谱。
摘要（英）：

An apparatus for decoding an encoded audio signal to obtain a reconstructed audio signal is provided. The apparatus comprises a receiving interface (1210) for receiving one or more frames comprising information on a plurality of audio signal samples of an audio signal spectrum of the encoded audio signal, and a processor (1220) for generating the reconstructed audio signal. The processor (1220) is configured to generate the reconstructed audio signal by fading a modified spectrum to a target spectrum, if a current frame is not received by the receiving interface (1210) or if the current frame is received by the receiving interface (1210) but is corrupted, wherein the modified spectrum comprises a plurality of modified signal samples, wherein, for each of the modified signal samples of the modified spectrum, an absolute value of said modified signal sample is equal to an absolute value of one of the audio signal samples of the audio signal spectrum. Moreover, the processor (1220) is configured to not fade the modified spectrum to the target spectrum, if the current frame of the one or more frames is received by the receiving interface (1210) and if the current frame being received by the receiving interface (1210) is not corrupted.

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