Panasonic DMR-ES30V Operating Guide

This is a signal compressed and converted into digital form. It is 
converted back to a multi-channel audio signal, e.g., 5.1-channel, by 
a decoder.

CPRM is technology used to protect broadcasts that are allowed to 
be recorded only once. Such broadcasts can be recorded only with 
CPRM compatible recorders and discs.

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

This is the process of remixing the multi-channel audio found on 
some discs into two channels. It is useful when you want to listen to 
the 5.1-channel audio recorded on DVDs through your TV’s 
speakers. Some discs prohibit down-mixing. If this is the case, this 
unit can only output the front two channels.

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. Dynamic range compression 
means reducing the gap between the loudest and softest sounds. 
This means you can hear dialog clearly at low volume.

Film and Video

DVD-Videos are recorded using either film or video. The unit can 
determine which type has been used, then uses the most suitable 
method of progressive output.
≥Film is 24 or 30 frames per second, with motion picture film 

generally being 24 frames per second.

≥Video is 60 fields per second (2 fields making up 1 frame).

A process that makes play of a recorded CD-R, CD-RW, DVD-R, etc. 
possible on equipment that can play such media. You can finalize 
DVD-R, DVD-RW (DVD-Video format) and +R on the unit. After 
finalizing, the disc becomes play-only and you can no longer record 
or edit. However, finalized DVD-RW can be formatted to become 
recordable.

Formatting is the process of making media such as DVD-RAM 
recordable on recording equipment.
You can format DVD-RAM and DVD-RW (only as DVD-Video format) 
on the unit.
Formatting irrevocably erases all contents on the disc.

Frame refers to the single images that constitute the video you see 
on your TV. Each frame consists of 2 fields.

≥A frame still shows 2 fields, so there may be some blurring between 

them, but picture quality is generally better.

≥A field still shows less picture information so it may be rougher, but 

there is no blurring.

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.

An audio compression method that compresses audio to 
approximately one-tenth of its size without any considerable loss of 
audio quality. You can play MP3s you have recorded onto CD-R and 
CD-RW.

Pan & Scan/Letterbox

In general, DVD-Video are produced with the intention that they will 
be viewed on a widescreen TV (16:9 aspect ratio), so images often 
don’t fit regular TVs (4:3 aspect ratio). 2 styles of picture, 
“Pan & Scan” and “Letterbox”, deal with this problem.

Pan & Scan:

The sides are cut off so the picture fills the screen.

Letterbox: 

Black bands appear at the top and bottom of the 
picture so the picture itself appears in an aspect ratio 
of 16:9.

If a Video CD has playback control, you can select scenes and 
information with menus displayed on the screen.
(The unit is compatible with version 2.0 and 1.1.)

NTSC, the video signal standard, has 480 interlaced (i) scan lines, 
whereas progressive scanning uses twice the number of scan lines. 
This is called 480p.
Using progressive output, you can enjoy the high-resolution video 
recorded on media such as DVD-Video.
Your TV must be compatible to enjoy progressive video.

You can prevent accidental erasure by setting writing protection or 
erasure protection.

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.

This refers to a miniature representation of a picture used to display 
multiple pictures in the form of a list.

This is a system used for compressing/decoding color still pictures, a 
common format for storing high quality images on digital cameras 
and other devices.

=     

+

ES30VP&PC.book  64 ページ  ２００５年２月２１日　月曜日　午後２時３２分