Panasonic SC-DK10 - Manual (Page 58)

Glossary
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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.
Video
Digital audio
Bitstream
This is the digital form of multiple channel audio data (e.g. 5.1 chan­
nel) 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.
Frame
Frames are the still pictures that go together to make a moving pic­
ture. 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 (l-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.
Sampling rate
This is the number of samples of sound taken per second during con­
version to a digital signal. Sampling frequency is expressed in kilo­
hertz (kHz). A high sampling frequency results in a sound close to the
original when played back.
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