Manual Yamaha AVXS100 (page 76 of 82) (English)

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GLOSSARY

Bitstream

This is the digital form of multiple channel audio data

(eg., 5.1 channel) before it is decoded into its various

channels.

CINEMA DSP

Since the Dolby Surround and DTS systems were

originally designed for use in movie theaters, their effect

is best felt in a theater having many speakers and

designed for acoustic effects. Since home conditions,

such as room size, wall material, number of speakers, and

so on, can differ so widely, it’s inevitable that there are

differences in the sound heard as well. Based on a wealth

of actually measured data, YAMAHA CINEMA DSP uses

YAMAHA original sound field technology to combine

Dolby Pro Logic, Dolby Digital and DTS systems to

provide the visual and audio experience of movie theater

in the listening room of your own home.

Component video signal

With the component video signal system, the video signal

is separated into the Y signal for the luminance and the

and P

signals for the chrominance. Color can

be reproduced more faithfully with this system because

each of these signals is independent. The component

signal is also called the “color difference signal” because

the luminance signal is subtracted from the color signal.

A monitor with component input jacks is required in

order to use the component signal for output.

Decoder

A decoder restores the coded signals on DVDs to normal.

This is called decoding.

Dolby Digital

This is a method of coding digital signals developed by

Dolby Laboratories. Apart from stereo (2-channel) audio,

these signals can also be 5.1-channel audio. A large

amount of audio information can be recorded on one disc

using this method.

Dolby Pro Logic

A surround system where a 4-channel audio track is

recorded as 2 channels and then is restored to 4 channels

for play. The surround channel is monaural and can

reproduce up to 7 kHz.

Dolby Pro Logic II

Dolby Pro Logic II is an improved technique used to

decode vast numbers of existing Dolby Surround

software. This new technology enables a discrete 5-

channel playback with 2 front channels, 1 center channel,

and 2 rear channels (instead of only 1 rear channel for

conventional Pro Logic technology). A music mode is

also available for 2-channel sources in addition to the

movie mode.

DTS (Digital Theater Systems)

This surround system is used in many movie theaters

around the world. There is good separation between the

channels, so realistic sound effects are possible.

Dynamic range

Dynamic range is the difference between the lowest level

of sound that can be heard above the noise of the

equipment and the highest level of sound before distortion

occurs.

Film and video

DVDs are recorded using either film or video. Film is

recorded at 24 frames per second, the rate movies are

filmed at, although some recent progressive material is

recorded at 30 frames per second.

Video is recorded at 30 frames per second.

Frame still and field still

A still is shown when you pause a moving picture. A

frame still is made up of two alternating fields, so the

picture may appear blurred, but overall quality is high.

A field still is not blurred, but it has only half the

information of a frame still so picture quality is lower.

Frames are the still pictures that go together to make a

moving picture.

There are about 30 frames shown each second.

One frame is made up of two fields. A regular television

shows these fields one after the other to create frames.

Group

A DVD audio disc is divided into large sections called

“groups” and smaller sections called “tracks”. The

numbers allocated to these sections are called “group

numbers” and “track numbers”.

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Yamaha AVXS100 Manual

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