Sony DAV-X1 Operating Instructions Manual page 9

Copyrights
This prodnct incorporates copyright protection
technology that is protected by U.S. patents and
other intellectual property rights. Use of this
copyright protection technology must be
authorized by Macrovision, and is intended for
home and other limited viewing uses only unless
otherwise authorized by Macrovision. Reverse
engineering or disassembly is prohibited.
This system incorporates with Dolby* 1 Digital
and Dolby Pro Logic (II) adaptive matrix
surround decoder and the DTS .2 Digital
Surround System.
This system perfectly decodes 5.1 channel
signal, but you cannot add other commercially
available surround speakers.
* 1 Mamtfilcimed unda license from Dolby
Laboralories.
"Dolby," "Pro Logic," and the double-D symbol are
trademarks of Dolby Laboratories
*2 Matmfilcimed unda license from Digital Theater
Systems, Inc
"DTS" and "DTS Digital SmTotmd" are lmdemarks
of Digital Theater Systems, Inc
9 US