实现用于转换编码激发长期预测之改进槪念的装置及方法;APPARATUS AND METHOD REALIZING IMPROVED CONCEPTS FOR TCX LTP

摘要

提供一种用于解码一经编码音讯信号以获得一经重建构音讯信号之装置。该装置包含用于接收复数个讯框之一接收介面、用于储存该经解码音讯信号之音讯信号样本的一延迟缓冲器、用于自储存于该延迟缓冲器中的该音讯信号样本选择复数个选定音讯信号样本之一样本选择器及用于处理该等选定音讯信号样本以获得该经重建构音讯信号之经重建构音讯信号样本的一样本处理器。该样本选择器经组配以在一当前讯框由该接收介面接收的情况下及在由该接收介面接收之该当前讯框未被损毁的情况下取决于由该当前讯框所包含的一音高滞后资讯自储存于该延迟缓冲器中之该等音讯信号样本选择该复数个选定音讯信号样本。此外，该样本选择器经组配以在该当前讯框不由该接收介面接收的情况下或在由该接收介面接收之该当前讯框被损毁的情况下取决于由先前由该接收介面所接收之另一讯框所包含的一音高滞后资讯自储存于该延迟缓冲器中之该等音讯信号样本选择该复数个选定音讯信号样本。; 1320) for storing audio signal samples of the decoded audio signal, a sample selector (1030; 1330) for selecting a plurality of selected audio signal samples from the audio signal samples being stored in the delay buffer (1020; 1320), and a sample processor (1040; 1340) for processing the selected audio signal samples to obtain reconstructed audio signal samples of the reconstructed audio signal. The sample selector (1030; 1330) is configured to select, if a current frame is received by the receiving interface (1310) and if the current frame being received by the receiving interface (1310) is not corrupted, the plurality of selected audio signal samples from the audio signal samples being stored in the delay buffer (1020; 1320) depending on a pitch lag information being comprised by the current frame. Moreover, the sample selector (1030; 1330) is configured to select, if the current frame is not received by the receiving interface (1310) or if the current frame being received by the receiving interface (1310) is corrupted, the plurality of selected audio signal samples from the audio signal samples being stored in the delay buffer (1020; 1320) depending on a pitch lag information being comprised by another frame being received previously by the receiving interface (1310).