Bedienungsanleitung Panasonic sc ht 545 (Seite 13 von 40) (Englisch)

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Glossary

Decoder

A decoder restores the coded audio signals on DVDs to normal. This is

called decoding.

DivX

DivX is a popular media technology created by DivX, Inc. DivX media files

contain highly compressed video with high visual quality that maintains a

relatively small file size.

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 film 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 films.

Video: Recorded at 25 frames/50 fields per second (PAL discs) or

30 frames/60 fields per second (NTSC discs). Generally

appropriate for TV drama programs or animation.

Frame still and field 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 fields. A regular television shows these

fields 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 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.

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 benefit 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.

MPEG4

A compression system for use on mobile devices or a network, that allows

highly efficient recording at a low bit rate.

Playback control (PBC)

If a Video CD has playback control, you can select scenes and

information with menus.

Progressive/Interlaced

The PAL video signal standard has 576 interlaced (i) scan lines, whereas

progressive scanning, called 576p, uses twice the number of scan lines.

For the NTSC standard, these are called 480i and 480p respectively.

Using progressive output, you can enjoy the high-resolution video

recorded on media such as DVD-Video.

Your television must be compatible to enjoy progressive video.

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 file size that is smaller

than that of MP3.

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