Panasonic SC-PT450 Glossary

RQT8043

RQTX0066

REFERENCE ENGLISHENGLISH

Decoder

A decoder restores the co ded audio signals on DVDs to

normal. This is called dec oding.

Dolby Digital

This is a method of coding dig ital signals developed by

Dolby Laboratories. Ap art from stereo (2-channel ) audio,

these signals can also be mu lti-channel audio. A large

amount of audio information c an be recorded on one disc

using this method.

DTS (Digital Theater Systems)

This surround system is used in many m ovie theaters

around the world. There is goo d separation between the

channels, so realistic soun d effects are possible.

Dynamic range

Dynamic range is the differe nce between the lowest level of

sound that can be heard above t he noise of the equipment

and the highest level of sound be fore distortion occur s.

Film and video

DVD-Videos are recorded using ei ther ﬁ lm or video. This

unit can determine which t ype has been used, then uses

the most suitable method o f progressive output.

Film: Recorded at 25 fr ames per second (PAL discs)

or 24 frames per second (NTSC di scs). (NTSC

discs recorded at 30 fra mes per second as well).

Generally appropriate f or motion picture ﬁ lms.

Video: Reco rded at 25 frames/50 ﬁ elds per second

(PAL discs) or 30 frames/ 60 ﬁ elds per second

(NTSC discs). Generally a ppropriate for TV drama

programs or animation.

Frame still and ﬁ eld still

Frames are the still pictures tha t go together to make a

moving picture.

There are about 30 frames show n each second.

One frame is made up of two ﬁ elds. A regular television

shows these ﬁ elds one after the other to create frames.

A still is shown when you pause a movi ng picture. A frame

still is made up of two alterna ting ﬁ elds, so the picture may

appear blurred, but overall q uality is high.

A ﬁ eld still is not blurred, but it h as only half the information

of a frame still so picture quali ty is lower.

HDMI (High-Deﬁ nition Multimedia Interface)

HDMI is a next-generation digital interface for consumer

electronic products. Unlike conventional connections, it

transmits uncompressed digital video and audio signals on a

single cable. This unit supports high-deﬁ nition video output

(720p,1080p) from the HDMI AV OUT terminal. To enjoy

high-deﬁ nition video, a high-deﬁ nition compatible television

is required.

I/P/B

MPEG 2, the video compression st andard adopted for use

with DVD-Video, codes frames using these 3 picture types.

I: Intra code d picture

This pi cture has the best quality an d is the best to use

when adjusting the pictu re.

P: Predictive coded p icture

This pi cture is calculated base d on past I or P-pictures.

B: Bidirectionally-predi ctive coded picture

This pi cture is calculated by compa ring past and

future I and P-pictures so it has t he lowest volume of

information.

JPEG (Joint Photographic Experts Group)

This is a system used for compres sing/decoding c olor

still pictures. If you selec t JPEG as the storage system

on digital cameras, etc., the dat a will be compressed to

1/10–1/100 of its original size. The beneﬁ t of JPEG is less

deterioration in pictur e quality considering the d egree of

compression.

Linear PCM (Pulse Code Modulation)

These are uncompressed d igital signals, similar to thos e

found on CDs.

MP3 (MPEG Audio Layer 3)

An audio compression met hod that compresses audio to

approximately one tenth of its s ize without any considerabl e

loss of audio quality.

Playback control (PBC)

If a Video CD has playback con trol, you can select scenes

and information with menus.

Progressive/Interlaced

The PAL video signal standard has 576 inte rlaced (i) scan

lines, whereas progressi ve scanning, called 576p, uses

twice the number of sca n lines. For the NTSC standard,

these are called 480i and 4 80p respectively.

Using progressive outpu t, you can enjoy the high-resoluti on

video recorded on med ia such as DVD-Video. Your

television must be compat ible to enjoy progressive vid eo.

Sampling frequency

Sampling is the process of c onverting the heights of soun d

wave (analog signal) samples t aken at set periods into

digits (digital encoding).

Sampling frequency is the nu mber of samples taken per

second, so larger number s mean more faithful reprodu ction

of the original sound.

WMA (Windows MediaTM Audio)

WMA is a compression format d eveloped by Microsoft

Corporation. It achieves the s ame sound quality as MP3

with a ﬁ le size that is smaller than that of MP3.

Glossary

RQTX0066-L_new12.indd 37RQTX0066-L_new12.indd 37 3/21/07 9:58:51 AM3/21/07 9:58:51 AM