Digital audio is actually people usually say of AC - 3 theater system, the so-called AC - 3 is actually dolby AC - 3, namely dolby digital is America dolby public company third-generation audio chip, first generation is dolby stereo, second generation is dolby directional logic, dolby AC - 3 at present more popular, with AC - 3 decoding of equipment, and moderate price also by several film company to support, so many sources. Dolby AC - 3 and d t s two surround decoding system principle, as the independent and track plus a low sound, dolby AC - 3 recorded for audio signal compression ratio for 12:1, and d t s is 3:1, it signals access rate is dolby AC - 3 4 times, so d t s effect details richer and more real. And dolby AC - 3 is a exaggerated effect, but d t s coding sources much, a digital home cinema configuration: first to a belt dolby AC - 3 or d t s decoding AV center (pa), a big screen color TV, a belt dolby AC - 3 or d t s digital output DVD machine, five whole frequency with power speakers (the Lord speakers, buy and surround speakers), a low sound speakers, this is the most basic configuration.
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