Manual KEF KIT200 (page 28 of 104) (English, German, Dutch, Danish, French, Italian, Portuguese, Spanish)

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dolby surround

dts digital surround

macrovision

progressive scan output at 525p and 625p

dvd region codes

1. Dolby Digital

Dolby Digital is the multi-channel digital signal format developed by Dolby Laboratories. Dolby Digital consists of up

to “5.1” channels – front left, front right, centre, surround left, surround right and an additional channel

exclusively reserved for additional deep bass sound effects. (The Low Frequency Effects (LFE) channel containing bass

frequencies of up to 120Hz). Unlike the analogue Dolby Pro Logic format, Dolby Digital’s channels can all contain full

range sound information, from the lowest bass, up to the highest frequencies (22kHz). The signals within each channel

are distinct from the others, allowing pinpoint sound imaging, and Dolby Digital offers tremendous dynamic range

from the most powerful sound effects to the quietest, softest sounds, free from noise and distortion.

2. Dolby Pro Logic II

Dolby Pro Logic II is a new multi-channel playback format developed by Dolby Laboratories using feedback logic

steering technology and offering improvements over conventional Dolby Pro Logic circuits. Dolby Pro Logic II can be

used to decode not only sources recorded in Dolby Surround but also regular stereo sources into five channels (front

left, front right, centre, surround left and surround right) to achieve surround sound. Whereas with conventional

Dolby Pro Logic the surround channel playback frequency band was limited, Dolby Pro Logic II offers a wider band

range (20Hz to 20kHz or greater). In addition the surround channels were monoaural (the surround left and right

channels were the same) with previous Dolby Pro Logic, but with Dolby Pro Logic II they are played as stereo signals.

3. Dolby Surround

These are sources in which three or more channels of surround have been recorded as two channels using Dolby

Surround encoding technology. Dolby Surround is used for the sound tracks of movies recorded on DVDs, LDs and

video cassettes to be played on VCRs, as well as for the stereo broadcast signals of FM radio, TV, satellite

broadcasts and cable TV. Decoding these signals with Dolby Pro Logic makes it possible to achieve multi-channel

surround playback. The signals can also be played on ordinary stereo equipment, in which case they provide normal

stereo sound. There are two types of DVD Dolby S U R R O U N D recording signals. 1) 2-channel PCM stereo signals 2) 2-

channel Dolby Digital signals.

The KEF Instant Theatre is manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic” and the

double-D symbol are trademarks of Dolby Laboratories.

Digital Theatre Surround (also called simply DTS) is a multi-channel digital signal format developed by Digital Theatre

Systems. DTS offers the same “5.1” playback channels as Dolby Digital (front left, front right and centre, surround

left and surround right) as well as the stereo 2-channel mode. The signals for the different channels are fully

independent, eliminating the risk of deterioration of sound quality due to interference between signals and crosstalk

etc. DTS features a relatively higher bit rate as compared to Dolby Digital (1234 kbps for CDs and LDs, 1536 kbps

for DVDs) so it operates with a relatively low compression rate. Because of this the amount of data is great, and

when DTS playback is used in movie theatres, a separate CDROM synchronised with the film is played. With LDs and

DVDs, there is of course no need for an extra disc;

the pictures and sound can be recorded simultaneously on the same disc, so the discs can be handled in the same way

as discs with other formats. There are also music CDs recorded in DTS. These CDs include 5.1-channel surround

signals (compared to two channels on current CDs). They do not include picture data, but they offer surround

KIT200_Manual.qxd 10/1/11 15:04 Page 28

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KEF KIT200 Manual

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