HD Audio formats explained

HD-DVD

Linear PCM (LPCM) - up to 8 channels of uncompressed audio.

Dolby Digital (AC-3 / DD) - format used for DVDs, 5.1-channel surround sound.

Dolby Digital Plus (DD+) - extension of Dolby Digital, 7.1-channel surround sound.

Dolby TrueHD - lossless encoding of up to 8 channels of audio.

DTS Digital Surround - format used for DVDs, 5.1-channel surround sound.

DTS-HD High Resolution Audio - extension of DTS, 7.1-channel surround sound.

DTS-HD Master Audio - lossless encoding of up to 8 channels of audio.

Blu-Ray