公开(公告)号：US5832445A

公开(公告)日：1998-11-03

申请号：US621764

申请日：1996-03-22

申请人： Fei Gao ,  Thomas Oberthur ,  Mathias Tilmann

发明人： Fei Gao ,  Thomas Oberthur ,  Mathias Tilmann

IPC分类号： H04N5/60 ,  G10L3/02 ,  H04B1/66

CPC分类号： H04N5/602

摘要： A method and apparatus for the decoding of digital audio data encoded in accordance with layer 1 or 2 of the MPEG format. The inverse quantization of the quantizised data samples and the resealing of the inverse quantizised data samples takes place contemporaneously with windowing of the data samples transformed into the time domain and not contemporaneously with transformation of data samples from the frequency domain into the time domain using a matrix operation. The apparatus has fixed-wire frame unpacking and filter bank units. The frame unpacking unit is used for frame synchronization of a data stream, header decoding, reading of page information, inverse quantization of quantizised subband data samples and resealing of the inverse quantizised data samples. The filter bank unit is used for transformation of rescaled data samples from the frequency domain into the time domain using a matrix operation and for windowing of the data transformed into the time domain.

摘要翻译： 一种用于解码根据MPEG格式的层1或2编码的数字音频数据的方法和装置。 量化数据样本的逆量化和反向量化数据样本的重新密封同时发生转换到时域的数据样本的窗口，而不是同时使用矩阵从频域到时域的数据样本的变换 操作。 该装置具有固定线框架开箱和过滤库单元。 帧拆包单元用于数据流的帧同步，报头解码，页面信息的读取，量化的子带数据样本的逆量化以及反向量化的数据样本的重新密封。 滤波器组单元用于使用矩阵运算将转换后的数据样本从频域转换为时域，并将窗口转换为时域的数据。