Bedienungsanleitung Panasonic sc pt150 (Seite 37 von 40) (Englisch)

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RQTX0029

REFERENCE

ENGLISH

Glossary

Decoder

A decoder restores the coded audio 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 multi-channel audio.

A large amount of audio information can be recorded

on one disc using this method.

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

DVD-Videos are recorded using either ﬁ lm or video.

This unit can determine which type has been used,

then uses the most suitable method of progressive

output.

Film: Recorded at 25 frames per second (PAL

discs) or 24 frames per second (NTSC discs).

(NTSC discs recorded at 30 frames per

second as well). Generally appropriate for

motion picture ﬁ lms.

Video: Recorded at 25 frames/50 ﬁ elds per second

(PAL discs) or 30 frames/60 ﬁ elds per second

(NTSC discs). Generally appropriate for TV

drama programs or animation.

Frame still and ﬁ eld still

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 ﬁ elds. A regular

television shows these ﬁ elds one after the other to

create frames.

A still is shown when you pause a moving picture.

A frame still is made up of two alternating ﬁ elds, so

the picture may appear blurred, but overall quality is

high.

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

information of a frame still so picture quality is lower.

I/P/B

MPEG 2, the video compression standard adopted

for use with DVD-Video, codes frames using these 3

picture types.

I: Intra coded picture

This picture has the best quality and is the best to

use when adjusting the picture.

P: Predictive coded picture

This picture is calculated based on past I or P-

pictures.

B: Bidirectionally-predictive coded picture

This picture is calculated by comparing past and

future I and P-pictures so it has the lowest volume

of information.

JPEG (Joint Photographic Experts Group)

This is a system used for compressing/decoding

color still pictures. If you select JPEG as the storage

system on digital cameras, etc., the data will be

compressed to 1/10–1/100 of its original size. The

beneﬁ t of JPEG is less deterioration in picture quality

considering the degree of compression.

Linear PCM (Pulse Code Modulation)

These are uncompressed digital signals, similar to

those found on CDs.

MP3 (MPEG Audio Layer 3)

An audio compression method that compresses

audio to approximately one tenth of its size without

any considerable loss of audio quality.

Playback control (PBC)

If a Video CD has playback control, you can select

scenes and information with menus.

Sampling frequency

Sampling is the process of converting the heights

of sound wave (analog signal) samples taken at set

periods into digits (digital encoding).

Sampling frequency is the number of samples taken

per second, so larger numbers mean more faithful

reproduction of the original sound.

WMA (Windows Media

Audio)

WMA is a compression format developed by

Microsoft Corporation. It achieves the same sound

quality as MP3 with a ﬁ le size that is smaller than that

of MP3.

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