Before revision: Dolby Digital The former Dolby Digital logo, entitled "Aurora", that was sometimes shown at the start of broadcasts, feature films, and video games The old Dolby Digital logo Dolby Digital is the common version containing up to six discrete channels of sound.
After revision: Dolby AC-3 The former Dolby AC-3 (a backronym for Audio Codec 3, Advanced Codec 3, or Acoustic Coder 3), also known as ATSC A/52 (name of the standard) or simply Dolby Digital (DD), logo, entitled "Aurora", that was sometimes shown at the start of broadcasts, feature films, and video games The old Dolby Digital logo Dolby Digital is the common version containing up to six discrete channels of sound.