Denon ADV-M71 User Manual download pdf (Page 46)

ENGLISH

Surround

This unit is equipped with a digital signal processing circuit that lets you play program sources in the surround mode to achieve the same sense

of presence as in a movie theater.

Dolby Surround

(1) Dolby Digital (Dolby Surround AC-3)

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, center, surround left, surround right, and an additional channel exclusively

reserved for additional deep bass sound effects (the Low Frequency Effects – LFE – channel, also called the “.1” channel, containing bass

frequencies of up to 120 Hz).

Unlike the analog Dolby Pro Logic format, Dolby Digital’s main channels can all contain full range sound information, from the lowest bass, up

to the highest frequencies – 22 kHz. 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 Digital and Dolby Pro Logic

Comparison of home surround systems

No. recorded channels (elements)

No. playback channels

Playback channels (max.)

Audio processing

High frequency playback limit of surround

channel

Dolby Digital

5.1 ch

L, R, C, SL, SR, SW

Digital discrete processing Dolby Digital (AC-3) encoding/decoding

20 kHz

Dolby Pro Logic

2 ch

4 ch

L, R, C, S (SW - recommended)

Analog matrix processing Dolby Surround

7 kHz

2 Dolby Digital compatible media and playback methods

Marks indicating Dolby Digital compatibility: and .

The following are general examples. Also refer to the player’s operating instructions.

Media

LD (VDP)

DVD

Others

(satellite broadcasts, CATV, etc.)

Dolby Digital output jacks

Coaxial Dolby Digital RF output jack

Optical or coaxial digital output

(same as for PCM)

Optical or coaxial digital output

(same as for PCM)

Playback method (reference page)

Set the input mode to “AUTO”.

(Page 43, 44)

Set the input mode to “AUTO”.

(Page 43, 44)

Set the input mode to “AUTO”.

(Page 43, 44)

1 Use a commercially available adapter to connect Dolby Digital RF (AC-3RF) output signals to the digital input terminals. (Refer to the

adapter’s operating instructions.)

Please refer to the instruction manual of the adapter when making connection.

2 To play in Dolby Digital Surround on the ADV-M71, set “DVD SUTUP” – “AUDIO SETUP” – “DIGITAL OUT” to “Normal” in the setup.

(The factory default is “Normal”.)

(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, center, 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 (20 Hz to 20 kHz or greater). In addition, the surround channels were monaural (the surround left and right channels were the

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

•

Various parameters can be set according to the type of source and the contents, so it is possible to achieve optimum decoding (see page 59).

Sources recorded in Dolby Surround

These are sources in which three or more channels of surround have been recorded as two channels of signals 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 stereo 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.

q 2-channel PCM stereo signals

w 2-channel Dolby Digital signals

Regardless of the signal being played, when the 2-channel decode mode is set to the “Pro Logic II” mode in the “AUTO DECODE” mode,

the surround mode is automatically set to “Dolby Pro Logic II”.

DOLBY / DTS SURROUND

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Denon ADV-M71 User Manual Page 46

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