Manual Denon AVR-550SD (page 43 of 96) (German)

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DTS-ES Extended Surround™

DTS-ES Extended Surround is a new multi-channel digital signal format developed by Digital Theater Systems

Inc. While offering high compatibility with the conventional DTS Digital Surround format, DTS-ES Extended

Surround greatly improves the 360-degree surround impression and space expression thanks to further expanded

surround signals. This format has been used professionally in movie theaters since 1999.

In addition to the 5.1 surround channels (FL, FR, C, SL, SR and LFE), DTS-ES Extended Surround also offers the

SB (Surround Back, sometimes also referred to as “surround center”) channel for surround playback with a total

of 6.1 channels. DTS-ES Extended Surround includes two signal formats with different surround signal recording

methods, as described below.

2 DTS-ES™ Discrete 6.1

DTS-ES Discrete 6.1 is the newest recording format. With it, all 6.1 channels (including the SB channel) are

recorded independently using a digital discrete system. The main feature of this format is that because the

SL, SR and SB channels are fully independent, the sound can be designed with total freedom and it is possible

to achieve a sense that the acoustic images are moving about freely among the background sounds

surrounding the listener from 360 degrees.

Though maximum performance is achieved when sound tracks recorded with this system are played using a

DTS-ES decoder, when played with a conventional DTS decoder the SB channel signals are automatically

down-mixed to the SL and SR channels, so none of the signal components are lost.

2 DTS-ES™ Matrix 6.1

With this format, the additional SB channel signals undergo matrix encoding and are input to the SL and SR

channels beforehand. Upon playback they are decoded to the SL, SR and SB channels. The performance of

the encoder used at the time of recording can be fully matched using a high precision digital matrix decoder

developed by DTS, thereby achieving surround sound more faithful to the producer’s sound design aims than

with conventional 5.1- or 6.1-channel systems.

In addition, the bit stream format is 100% compatible with conventional DTS signals, so the effect of the

Matrix 6.1 format can be achieved even with 5.1-channel signal sources. Of course it is also possible to play

DTS-ES Matrix 6.1 encoded sources with a DTS 5.1-channel decoder.

When DTS-ES Discrete 6.1 or Matrix 6.1 encoded sources are decoded with a DTS-ES decoder, the format is

automatically detected upon decoding and the optimum playing mode is selected. However, some Matrix 6.1

sources may be detected as having a 5.1-channel format, so the DTS-ES Matrix 6.1 mode must be set manually

to play these sources.

(For instructions on selecting the surround mode, see page 23.)

The DTS-ES decoder includes another function, the DTS Neo:6 surround mode for 6.1-channel playback of digital

PCM and analog signal sources.

2 DTS Neo:6™ surround

This mode applies conventional 2-channel signals to the high precision digital matrix decoder used for DTS-ES

Matrix 6.1 to achieve 6.1-channel surround playback. High precision input signal detection and matrix

processing enable full band reproduction (frequency response of 20 Hz to 20 kHz or greater) for all 6.1

channels, and separation between the different channels is improved to the same level as that of a digital

discrete system.

DTS Neo:6 surround includes two modes for selecting the optimum decoding for the signal source.

• DTS Neo:6 Cinema

This mode is optimum for playing movies. Decoding is performed with emphasis on separation performance

to achieve the same atmosphere with 2-channel sources as with 6.1-channel sources.

This mode is effective for playing sources recorded in conventional surround formats as well, because the

in-phase component is assigned mainly to the center channel (C) and the reversed phase component to the

surround (SL, SR and SB channels).

• DTS Neo:6 Music

This mode is suited mainly for playing music. The front channel (FL and FR) signals bypass the decoder and

are played directly so there is no loss of sound quality, and the effect of the surround signals output from

the center (C) and surround (SL, SR and SB) channels add a natural sense of expansion to the sound field.

DTS 96/24

The sampling frequency, number of bits and number of channels used for recording of music, etc., in studios has

been increasing in recent years, and there are a growing number of high quality signal sources, including 96

kHz/24 bit 5.1-channel sources.

For example, there are high picture/sound quality DVD video sources with 96 kHz/24 bit stereo PCM audio tracks.

However, because the data rate for these audio tracks is extremely high, there are limits to recording them on

two channels only, and since the quality of the pictures must be restricted it is common to only include still

pictures.

In addition, 96 kHz/24 bit 5.1-channel surround is possible with DVD audio sources, but DVD audio players are

required to play them with this high quality.

DTS 96/24 is a multi-channel digital signal format developed by Digital Theater Systems Inc. in order to deal with

this situation.

Conventional surround formats used sampling frequencies of 48 or 44.1 kHz, so 20 kHz was about the maximum

playback signal frequency. With DTS 96/24, the sampling frequency is increased to 96 or 88.2 kHz to achieve a

wide frequency range of over 40 kHz.

In addition, DTS 96/24 has a resolution of 24 bits, resulting in the same frequency band and dynamic range as 96

kHz/24 bit PCM.

As with conventional DTS Surround, DTS 96/24 is compatible with a maximum of 5.1 channels, so sources

recorded using DTS 96/24 can be played in high sampling frequency, multiple channel audio with such normal

media as DVD videos and CDs.

Thus, with DTS 96/24, the same 96 kHz/24 bit multi-channel surround sound as with DVD-Audio can be achieved

while viewing DVD-Video images on a conventional DVD-Video player ( 1). Furthermore, with DTS 96/24

compatible CDs, 88.2 kHz/24 bit multi-channel surround can be achieved using normal CD/LD players ( 1).

Even with the high quality multi-channel signals, the recording time is the same as with conventional DTS

surround sources.

What’s more, DTS 96/24 is fully compatible with the conventional DTS surround format, so DTS 96/24 signal

sources can be played with a sampling frequency of 48 kHz or 44.1 kHz on conventional DTS or DTS-ES surround

decoders ( 2).

1: A DVD player with DTS digital output capabilities (for CD/LD players, a player with digital outputs for

conventional DTS CDs/LDs) and a disc recorded in DTS 96/24 are required.

2: The resolution is 24 or 20 bits, depending on the decoder.

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Denon AVR-550SD Manual

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