说明：  自动编码器是一种数据的压缩算法，其中数据的压缩和解压缩函数是数据相关的、有损的、从样本中自动学习的。在大部分提到自动编码器的场合，压缩和解压缩的函数是通过神经网络实现的。
(Automatic encoder is a data compression algorithm, in which data compression and decompression functions are data-related, lossy, and self-learning from samples. In most cases, the functions of compression and decompression are realized by neural networks.)