Bedienungsanleitung Akai AA-V2080 (Seite 12 von 18) (Englisch)

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DOLBY SURROUND

This unit is equipped with digital signal processing sections for decoding and reproducing movie soundtracks the

same way as in movie theaters.

Dolby Pro Logic

When using conventional video tapes, laser discs, TV programs or CDs with the mark,

Dolby Pro Logic

extremely natural sound movement and positioning, immersing you in the on screen action. Pro Logic uses a

directional emphasis circuit to decode four output channels (front left and right, center and surround) from the two

audio channels provided on the software.

This set is equipped with six Dolby Pro Logic play modes: Pass through, Movie, Music, Roo

m, Theater and Hall.

You can select the optimum mode according to your preference.

Dolby Digital

When you connect the DVD player or an LD player with an DOLBY DIGITAL RF output to the DOLBY DIGITAL

RF input terminal and play DVD, laser discs with

mark, you can experience improved sound spatiality,

positioning, and impact compared with Pro Logic. This is because Dolby Digital delivers up to 5 totally discrete full

frequency audio channels (front left and right, center and surround left and right), plus a bass-only effect channel.

Since the signal is digital from the input of the program source until to the output of this unit, a higher quality and

clarity of surround sound results.

Dolby Digital is a system developed by Dolby Laboratories that transmits 5.1 channels of digital signals. The

surround system developed for movie theaters using this system is called “Dolby SR-D (Surround Digital)”.

Whereas the conventional Dolby Pro Logic Surround is an analog matrix system, Dolby SR-D is a digital discrete

system in which the different channels are completely independent. This makes it possible to achieve a realistic

sound field with a “three-dimensional” feel, giving the sound sense of distance, movement and relative position,

and creating a surprisingly real and powerful sense of presence when playing movie software in AV rooms.

There are 5.1 channels playback: three front channels (front left, center and front right), two surround channels

(surround left and surround right), plus “0.1 channel” called LFE (Low Frequency Effect) for low bass effect

sounds of 120 Hz or less. The signals are recorded on the software in fully discrete fashion, eliminating cross

talk between channels and making it possible to control the sound field in the listening/ viewing space with greater

precision.

In addition, the frequency range of the five channels extends up to 20kHz (the same as CDs), resulting in clear

sound with greater richness of expression.

Dolby Digital and Pro Logic

Home surround methods Dolby Digital Dolby Pro Logic

No. of recording channels

(material)

5.1 channels 2 channels

No. playback channels

5.1 channels 4 channels

Playback channels

L, R, C, SL, SR and SUB L, R, C, S (SUB recommended)

Audio processing

Digital Discrete processing, DOLBY

DIGITAL encoding / decoding

Analog matrix processing, Dolby

Surround

Upper reproduction limit of

surround channel

20 kHz 7 kHz

SING

URROUNDING

UNCTION

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