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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 SURROUND 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 playback on CD players that are equipped with digital outputs (PCM type digital
output required). External DTS CD bitstreams coming in on the optical SPDIF audio CBL input of the KEF Instant Theatre will not be decoded by
the KEF Instant Theatre system. DTS surround playback offers the same intricate, grand sounds as a movie theatre, right in your own listening
room.“DTS” and “DTS Digital Surround” are registered trademarks of Digital Theatre Systems Inc.
The KEF Instant Theatre incorporates copyright protection technology that is protected by U.S. patents and other intellectual property rights.
Use of this copyright protection technology must be authorised by Macrovision, and is intended for home and other limited viewing uses only
unless otherwise authorised by Macrovision. Reverse engineering or disassembly is prohibited.
Consumers should note that not all high definition television sets are fully compatible with this product and may cause artefacts to be displayed in
the picture. In case of 525 or 625 progressive scan picture problems, it is recommended that you switch the connection to the ‘standard
definition’ output by setting the DVD output to progressive “off”. If there are questions regarding the TV set compatibility with this 525p and
625p DVD player, please contact our customer service centre.
The KEF Instant Theatre is shipped with a specific DVD region code as marked on the rear panel of the DVD player.This will be region “1” for
America, region “2” for Europe and region “3” for Asia.The system will only play DVDs which match this region code.
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