Reliplay player is based on its own audio and video codecs. Codec is an algorithm that is used to compress and decompress digital video and audio signals into files of manageable size for transfer and storage.

The value of a codec is determined by two factors - first, the quality of the playback; second, the size of the files. They typically trade off against each other.

Reliplay encoding subsystem, compresses the master content file into the specified format for transmission and storage. The core of this system is the encoding software based on the Reliplay codec technology. Reliplay digital rights management (DRM) allows content to be protected against unauthorized copying and viruses.