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CN105431903B 实现用于转换编码激发长期预测的改进概念的装置及方法 有权

实现用于转换编码激发长期预测的改进概念的装置及方法
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多个帧的接收接口(1310)，用于储存解码音频信号的音频信号样本的延迟缓冲器(1020；1320)，用于从储存于延迟缓冲器(1020；1320)中的音频信号样本中选择多个选定音频信号样本的样本选择器(1030；1330)，及用于处理选定音频信号样本以获得重建音频信号的重建音频信号样本的样本处理器(1040；1340)。样本选择器(1030；1330)用于在当前帧由接收接口(1310)接收的情况下及在由接收接口(1310)接收的当前帧未被损毁的情况下，取决于由当前帧所包含的音高滞后信息从储存于延迟缓冲器(1020；1320)中的音频信号样本中选择多个选定音频信号样本。此外，样本选择器(1030；1330)用于在当前帧不由接收接口(1310)接收的情况下或在由接收接口(1310)接收的当前帧被损毁的情况下，取决于由先前由接收接口(1310)所接收的另一帧所包含的音高滞后信息从储存于延迟缓冲器(1020；1320)中的音频信号样本中选择多个选定音频信号样本。
摘要（英）：

An apparatus for decoding an encoded audio signal to obtain a reconstructed audio signal includes a receiving interface 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 for generating the reconstructed audio signal. The processor 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 or if the current frame is received by the receiving interface but is corrupted, wherein the modified spectrum includes a plurality of modified signal samples, wherein, for each of the modified signal samples of the modified spectrum, an absolute value of the modified signal sample is equal to an absolute value of one of the audio signal samples of the audio signal spectrum.

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