Instruction manual

Home theater formats

DOLBY PRO LOGIC

Dolby Pro Logic is used primarily for TV broad-

casts and VHS, since it is analog. The system

builds on four channels that are recoded to a two-

channel stereo signal during production. During

playbacks, the process is repeated in reverse, so

that the two channels become four.

DOLBY DIGITAL 5.1

A digital sound system. The sound track can only

be stored on digital media, such as DVDs. The

most common is the 5.1 format, which consists

of six separate channels. Channel “1” is for a very

deep bass.

DTS

One of Dolby’s competitors. On the home theater

market, the DTS format does not have as broad

a market share in DVDs as does Dolby Digital, in

spite of the fact that many people believe that DTS

provides a much better acoustic image.

DOLBY 6.1 AND 7.1

Both Dolby and DTS have developed sound sys

tems that can support several speakers in a home

theater setting. The 6.1 format encompasses 7

separate channels, which means that the back

speakers share space with a third channel. In the

7.1 format, the entire conﬁguration shifts, creating

a different acoustic image, with seven speakers:

three in front, one each to your right and your left,

and two behind you.

THX

THX is one standard for how a movie’s sounds

and images can be presented at their best. There-

fore, products that wish to use the THX logo on

their products or movie theaters must be certiﬁed

by Lucasﬁlm. THX is not a sound system, but

rather a quality guarantee.