Wat wordt er bedoeld met 5.1, 6.1 en 7.1
antwoord:
With respect to soundtracks, such as those on movies and DVDs, 5.1 means
that the soundtracks are recorded with five main channels: left, center,
right, left surround, and right surround, plus a low-frequency effects
(LFE) bass channel (called a ".1" channel because it covers
only a fraction of the frequency range of the main channels).
Some movie soundtracks use a variation on 5.1 called Dolby Digital Surround
EX, which has now migrated via DVDs to home theater. This format matrix
encodes a third surround channel onto the left and right surround channels
of 5.1 soundtracks, and may be decoded or not at the cinema’s or home
listener’s option due to their inherent compatibility. Because the extra
surround information is carried on the left and right surround channels,
Dolby Digital Surround EX encoded soundtracks are still regarded as 5.1
soundtracks.
With respect to home playback, the terms 5.1, 6.1, and 7.1 mean that there
are five, six, or seven main speakers, plus a subwoofer, in the playback
system. (The subwoofer reproduces the LFE channel recorded on 5.1 soundtracks,
plus any bass the main speakers cannot handle.) The difference is in the
number of surround speakers: two in a 5.1 system, three in a 6.1 system,
and four in a 7.1 system.
Obviously, a 5.1-channel soundtrack can be played on a 5.1-speaker system.
But it is not always understood is that it can also be played on a 6.1-
or a 7.1-speaker system. To do this, the two surround signals on the 5.1
soundtrack are spread across the three or four surround speakers. This
distribution can be accomplished by a Dolby Digital EX decoder, a THX
Surround EX decoder, or other proprietary methods provided in home theater
equipment by various manufacturers.
So the number (i.e., 5.1) describing the soundtrack does not have to match
the number applied to the speaker system. It’'s even possible to play
two-channel stereo content over these multi-speaker systems by using a
matrix surround decoder such as Dolby Pro Logic II. The delivery format
and the speaker configuration are independent, and it is the decoder's
job to bridge them effectively.
| Een volledige Dolby handleiding | DVD opnemen voors en tegens |
| Wat is 5.1, 6.1, 7.1...? | Welke speakers voor Surround? |
| Wat is Dolby Digital Surround EX | Opstellen van luidsprekers in Surround |
| Dolby Digital versus DTS | Plasma vs. LCD |
| THX? | DVD-audio vs. SACD, wat is nu het verschil en welke techniek gaat overleven? |
| DVD+RW vs DVD-RW |