Bedienungsanleitung Yamaha HTR-5930 (Seite 70 von 74) (Englisch)

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GLOSSARY

■ Dolby Digital

Dolby Digital is a digital surround sound system that gives

you completely independent multi-channel audio. With 3

front channels (front L/R and center), and 2 surround

stereo channels, Dolby Digital provides 5 full-range audio

channels. With an additional channel especially for bass

effects, called LFE (Low Frequency Effect), the system

has a total of 5.1-channels (LFE is counted as 0.1

channel). By using 2-channel stereo for the surround

speakers, more accurate moving sound effects and

surround sound environment are possible than with Dolby

Surround. The wide dynamic range from maximum to

minimum volume reproduced by the 5 full-range channels

and the precise sound orientation generated using digital

sound processing provide listeners with unprecedented

excitement and realism. With this unit, any sound

environment from monaural up to a 5.1-channel

configuration can be freely selected for your enjoyment.

■ Dolby Pro Logic II

Dolby Pro Logic II is an improved technique used to

decode vast numbers of existing Dolby Surround sources.

This new technology enables a discrete 5-channel

playback with 2 front left and right channels, 1 center

channel, and 2 surround left and right channels instead of

only 1 surround channel for conventional Pro Logic

technology. There are three modes available: “Music

mode” for music sources, “Movie mode” for movie

sources and “Game mode” for game sources.

■ Dolby Surround

Dolby Surround uses a 4-channel analog recording system

to reproduce realistic and dynamic sound effects: 2 front

left and right channels (stereo), a center channel for dialog

(monaural), and a surround channel for special sound

effects (monaural). The surround channel reproduces

sound within a narrow frequency range. Dolby Surround is

widely used with nearly all video tapes and laser discs,

and in many TV and cable broadcasts as well. The Dolby

Pro Logic decoder built into this unit employs a digital

signal processing system that automatically stabilizes the

volume on each channel to enhance moving sound effects

and directionality.

■ DTS (Digital Theater Systems)

Digital Surround

DTS digital surround was developed to replace the analog

soundtracks of movies with a 5.1-channel digital sound

track, and is now rapidly gaining popularity in movie

theaters around the world. Digital Theater Systems Inc.

has developed a home theater system so that you can enjoy

the depth of sound and natural spatial representation of

DTS digital surround in your home. This system produces

practically distortion-free 5.1-channel sound (technically,

left, right and center channels, 2 surround channels, plus

an LFE 0.1 channel as a subwoofer, for a total of 5.1-

channels).

■ ITU-R

ITU-R is the radio communication sector of the ITU

(International Telecommunication Union). ITU-R

recommends a standard speaker placement which is used

in many critical listening rooms, especially for mastering

purposes.

■ LFE 0.1 channel

This channel reproduces low-frequency bass signals. The

frequency range of this channel is from 20 Hz to 120 Hz.

This channel is counted as 0.1 because it only enforces a

low-frequency range compared to the full-range

reproduced by the other 5 channels in Dolby Digital or

DTS 5.1-channel systems.

■ PCM (Linear PCM)

Linear PCM is a signal format under which an analog

audio signal is digitized, recorded and transmitted without

using any compression. This is used as a method of

recording CDs and DVD audio. The PCM system uses a

technique for sampling the size of the analog signal per

very small unit of time. Standing for “Pulse Code

Modulation”, the analog signal is encoded as pulses and

then modulated for recording.

■ Sampling frequency and number of

quantized bits

When digitizing an analog audio signal, the number of

times the signal is sampled per second is called the

sampling frequency, while the degree of fineness when

converting the sound level into a numeric value is called

the number of quantized bits. The range of rates that can

be played back is determined based on the sampling rate,

while the dynamic range representing the sound level

difference is determined by the number of quantized bits.

In principle, the higher the sampling frequency, the wider

the range of frequencies that can be played back, and the

higher the number of quantized bits, the more finely the

sound level can be reproduced.

GLOSSARY

Audio information

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