Dolby Digital has been selected as the default format for DVD video, standard 2 channel audio playback and HDTV "Digital broadcasting". Dolby Digital features two independent surround channels giving the same full range as the three front channels. It also adds a Low Frequency Effect "LFE" channel. Dolby Digital accomplishes this by using a technique called compression. Digital Theater Systems "DTS" uses the same concept but implements a lower compression rate. This supposedly leads to more dynamic range, improved channel separation, and more subtle nuances.