Panasonic SC-PM86D operating instructions Glossary, MPEG4

Glossary

Decoder

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

ENGLISH		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
DANSK		be recorded on one disc using this method.
		DTS (Digital Theatre Systems)
		This surround system is used in many movie theatres 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.
FRANÇAIS		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.
4		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.
LANG
		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.
		HDMI (High-Definition Multimedia Interface)
		HDMI is a next-generation digital interface for consumer electronic
		products. Unlike conventional connections, it transmits uncompressed
		digital video and audio signals on a single cable. This unit supports
		high-definition video output (720p, 1080i, 1080p) from the HDMI
5		AV OUT terminal. To enjoy high-definition video, a high-definition
		compatible television is required.
LANG -
	RQTV0265

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 colour 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 (analogue 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 MediaTM 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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