Panasonic SC-HT800V 사용자 설명서

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Glossary
Decoder
A decoder restores the coded audio signals on DVDs to normal. This 
is called decoding.
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 be recorded on one disc using this method.
Dolby Pro Logic
A surround system where a 4-channel audio track is recorded as 
2 channels and then is rs u orsd to  4 channels fo r play. The su rround 
channel is monaural and can reproduce up to 7 kHz.
DTS (Digital Theater Systems)
This surround system is ussd in many movie theaters around the 
world. There is good separa ion be ween the channels, so realis ic 
sound effects are possible.
Dynamic range
Dynamic range is the difference be ween the lowest level of sound 
that can be heard above the noise of the equipment and the highest 
level of sound before distortion occurs.
Film and video
DVD-Videos are recorded using ei her film or video. Usually, film is 
recorded at 24 frames per second, the rate movies are filmed at, 
while video is recorded at 30 frames per second.
Frame still and field still
Frames are the still pictures that make moving pictures. About thirty 
are shown each second. A frame still may appear blurred but overall 
quali y is high.
Two fields appear alts rnatsly to  ma ke up one frame. A field s ill is 
not blurred but picture quality is lower. 
Interlace and progressive output
NTSC, the video signal standard, has 480 interlaced (I) scan lines, 
whereas progressive scanning usss  wice the number of scan lines. 
Th is is called 480P.
I/P/B
MPEG 2, the video compression standard adopted for use with
DVD-Video, codss framss us ing these 3 picture  ypes.
I: In ra codsd picture
This picture has the best quality and is the best to uss when 
adjus ing the picture.
P: Predictive codsd picture
Th is picture is calculatsd bassd on past I or P-pictures.
B: Bidirectionally-predictivs codsd 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 codeodula ion)
These are uncompressed digital signals, similar to those found on 
CDs. 
To clean this unit, wipe with a soft, dry cloth.
≥Neve r uss alcohol, pain   h inner or benzine to clean th is unit.
≥Be fo re  using chemically treated cloth, read the instructions that 
came with the cloth carefully.
Cleaning the video heads
Dirt on the video heads can cause poor recording and play.
To  clean the heads, insert and eject a taps 5 to  10 times in 
succession.
I f the picture does not  improve,  use an opt ional head-cleaning 
cassette (part number NV-TCL30PT). If the problem persists, seek 
advice f rom a qualif
ied se rvice person.
Maintenanc e