Panasonic DVD-LA95 operating instructions Glossary

Glossary

Bitstream

This is the digital form of multiple channel audio data (e.g., 5.1 channel) before it is decoded into its various channels.

	Decoder
	A decoder restores the coded audio signals
	on DVDs to normal. This is called decoding.
	Direct navigator
	This is a list of programs you have recorded.
	You can select programs from the list to
	view. The list also shows the date and time
	of recording, the channel, and the titles of
	titled programs. The selected program is
	played in the background, making selection
	even simpler.
	Dolby Digital
	This is a method of coding digital signals de-
	veloped 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 the
	disc using this method.
	Dolby Pro Logic
	A surround system where a 4-channel audio
Reference	track is recorded as 2 channels and then is
	duce up to 7 kHz.
	restored to 4 channels for play. The sur-
	round channel is monaural and can repro-
Your	DTS (Digital Theater Systems)
For	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.

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Frame still and field still

A still is shown when you pause a moving picture. A frame still is made up of 2 alter- nating 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 (I-picture)

This is the standard picture and is a complete picture in itself. This means it

has the best picture quality and is the best to use when adjusting the picture.

P:Predictive coded picture (P-picture) This picture is calculated based on past I

or P-pictures.

B:Bidirectionally-predictive coded picture (B-picture)

This picture is calculated by comparing past and future I and P-pictures so it has the lowest volume of information.

Linear PCM (pulse code modulation) PCM is the usual digital method used for music CDs. DVDs have a greater volume so they use linear PCM, which has a higher sampling rate. Compressed PCM signals are called packed PCM (PPCM).

MP3

A method of compressing audio, MPEG Audio Layer 3 (MP3) allows audio to be reduced to up to one tenth its original size without overtly hurting audio quality.

When creating MP3 files to play on this unit ≥Disc formats: ISO9660 level 1 and level 2

(except for extended formats)

≥Files: MP3 files with the suffix “.mp3” or “.MP3”

≥To have this unit play files in a certain order, prefix folder and file names with numbers in the order you want to play them. This may not work in all cases.

≥This unit is compatible with multi-session but if there are a lot of sessions it takes more time for play to start. Keep the num- ber of sessions to a minimum to avoid this.

RQT6025