Panasonic DMR-E20 warranty Glossary, Reference, Bitstream, Channel when referring to DVD, Decoder

Reference

Glossary

Bitstream

This is the compressed form of digital signals. A decoder decodes these signals into 5.1 surround and multi-channel signals.

Channel (when referring to DVD)

Sound is divided into channels based on the sound’s role. For example, 5.1 channel

³Front speakers—1 left channel and 1 right channel ³Center speaker—1 channel

³Surround speakers—1 left channel and 1 right channel

³Subwoofer—1 channelk0.1 (the ratio of bass to the total amount of sound output)

Examples as shown in the on-screen menus 3/2 .1ch

.1: Subwoofer signal

(not displayed if there is no subwoofer signal)

0:No surround

1:Mono surround

2:Stereo surround (left/right)

1:Center

2:Front leftiFront right

3:Front leftiFront rightiCenter

Component video output (Y, PB, PR)

The luminance (Y) and color difference (PB and PR) signals are sep- arated for output so colors are reproduced faithfully. The output form differs from that for 480P progressive output.

Decoder

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

Direct navigator

This is a list of programs you have recorded. You can select pro- grams from the list to view. The list also shows the date and time of recording, the channel, and the titles of titled programs. The select- ed program is played in the background, making selection even simpler.

Dolby Digital

This is a method of coding digital signals developed by Dolby Labo- ratories. Apart from stereo (2-channel) audio, these signals can also be 5.1-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 restored to 4 channels for play. The surround channel is monaural.

DTS Digital Surround

This surround system is used in many movie theaters around the world. The separation between channels is good and the compres- sion ratio is low, so realistic sound effects are possible.

DTS soundtracks are produced with the assumption that all chan- nels will be used.

Dynamic range

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.

Finalize

This process allows DVD-R to be played on compatible equipment.

Frame and field

Frames are the still pictures that go together to make a moving pic- ture. A frame is made up of two fields.

Frame	Field	Field
=		+

³A frame still is made up of two alternating fields, so the picture may appear blurred, but overall quality is high.

³A field still is not blurred, but it has only half the information of a frame still so picture quality is lower.

Linear PCM

This is a form of signal that has been digitized without compressing it. CDs are recorded with 44.1 kHz/16 bit PCM, while DVDs use PCM between 48 kHz/16 bit and 96 kHz /24 bit, allowing reproduc- tion of greater quality sound.

The linear PCM signals output from the DIGITAL AUDIO OUT, OPTICAL terminal are stereo (2 channel).

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