There are many different audio codecs, the most common DTS, ACC, MP3, WMA, to some extent, they compete with each other, have advantages and disadvantages. While not all manufacturers such support DTS codecs. Let us briefly consider about these codecs.
MP3 - compression codec, quite common is supported by almost all devices, the lack of quality loss in compression, but about 70% of people do not will distinguish the difference between the original file or compressed codec MP3.
WMA - codec developed by Microsoft as an alternative to MP3, protected and licensed codec can support copy protection.
ACC - compression codec developed by Apple as an alternative to MP3, as well as to protect the audio files from the copy downloaded from the iTunes store at this time is the standard codec compression for many such resources YouTube, PlayStation 3.
DTS - codec for digital cinema and home theater, unlike previous is that it was developed initially for sound support 5.1 and 7.1 analogue of this codec Dolby Digital codec.
Dolby Digital codec
Dolby Digital - codec, and a system designed to create surround sound in cinemas in the era of digital audio files 1991. It supports 5.1 sound in a subsequent improvement of the system and began to support 7.1 sound. DTS analogy.
What the viewer can experience discomfort
When watching video on an HD television quality and with the support of the DTS sound track, if your TV does not support this format, you will not hear the sound on the TV. But to tell the truth as a rule can be maintained and other audio standard, there may be several audio tracks, is another question if the TV supports their choice.
Just need to pay attention to the audio codec. But if we take the example Philips PFL4208T it does not support Dolby Digital and DTS.