Glossary – Panasonic SC-DK20 User Manual

Page 58

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References

RQT6345

58

Chapter

This is the smallest division on DVD and is roughly equivalent to a
track.

Title

This is the largest division on DVD.

Track

This is the smallest division on Video CD and Audio CD, and usually
equates to a single song.

PBC (Playback control)

This method of controlling disc play is included on version 2.0 Video
CDs. You are able to interact with the disc through menus.

Digital audio

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.

PCM (Pulse code modulation), Linear PCM

PCM is the usual digital method used for Audio CDs. DVDs have a
greater volume so they use linear PCM, which has a higher sampling
rate.

Sampling rate

This is the number of samples of sound taken per second during
conversion to a digital signal. Sampling frequency is expressed in
kilohertz (kHz). A high sampling frequency results in a sound close to
the original when played back.

MP3

A method of compressing audio, MPEG Audio Layer 3 (MP3) allows
audio to be reduced 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”

This unit is not compatible with files with a sampling rate of 32 kHz.

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 number of
sessions to a minimum to avoid this.

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

Glossary

Video

Frame

Frames are the still pictures that go together to make a moving
picture. There are about thirty frames shown each second.

Field

One frame is made up of two fields. A regular television shows these
fields one after the other to create frames.

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.

I/P/B

MPEG 2, the video compression standard adapted for use with DVD,
codes frames using these three 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 and 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.

001

001.mp3

Example:

002.mp3
003.mp3

001.mp3
002.mp3
003.mp3

001.mp3
002.mp3
003.mp3

004.mp3

002

003

root

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