It's all digital now, lossless compression.

一个美好的新世界。

Both run-length encoding and dictionary coders are lossless compression techniques.

游程编码和字典编码器都是无损压缩技术。

A compression technique that has this characteristic is called lossless compression, because we don't lose anything.

具有这种特性的压缩技术称为无损压缩，因为我们不会丢失任何东西。

Let's take a look at another type of lossless compression, where blocks of data are replaced by more compact representations.

让我们看一下另一种无损压缩，其中数据块被更紧凑的表示形式所取代。

The two approaches we discussed, removing redundancies and using more compact representations, are often combined, and underlie almost all lossless compressed file formats, like GIF, PNG, PDF and ZIP files.

我们讨论的这两种方法， 即删除冗余和使用更紧凑的表示， 通常结合使用，并且构成几乎所有无损压缩文件格式的基础， 如 GIF、PNG、PDF 和 ZIP 文件。