sentences:  E-AC-3 (Dolby Digital Plus) is an enhanced coding system based on the AC-3 codec.It offers increased bitrates (up to 6.144 Mbit/s), support for even more audio channels (up to 15.1 discrete channels in the future), and improved coding techniques (only at low data rates) to reduce compression artifacts, enabling lower data rates than those supported by AC-3 (e.g.5.1-channel audio at 256 kbit/s).