Dolby DP569 Encoder and DP564 Decoder

DP569 Multichannel Dolby Digital Encoder
Encodes up to 5.1-channels for DTV transmissions and DVD mastering applications.

DP564 Multichannel Audio Decoder
Decodes and monitors programs in Dolby Digital (up to 5.1 channels), Dolby Surround Pro Logic, Dolby Pro Logic II, Dolby Digital Surround EX, and PCM soundtracks.