Yamaha AVX-S80, HOMETHEATER SOUND SYSTEM owner manual Maintenance, Glossary, Reference

Unit displays		Page
“NO PLAY”	≥You inserted a disc the unit cannot play; insert one it can.	7
“CHECK DISC”	≥Disc is dirty. Wipe the disc clean.	–
“H∑∑”	≥Trouble is likely to have occurred. The number following “H” depends on the status of the unit.	–
∑∑ stands for a number.	Reset procedure:
	Press [STANDBY/ON] to switch the unit to the standby mode and then back to ON. Alternatively,
	press [STANDBY/ON] to switch the unit to the standby mode, disconnect the AC power cable,
	and then reconnect it.
	≥If the service numbers fail to clear, note the service number and contact a qualified service person.	–
“NO DISC”	≥You haven’t inserted a disc; insert one.	–
	≥You haven’t inserted the disc correctly; insert it correctly.	8
Television displays
No on-screen display.	≥Go to Display in the SETUP menus, and select “On” for “On-Screen Messages”.	16
On-Screen Menu Icons not	≥Press [3, 4] while the rightmost icon is highlighted to move them.	13
displayed or only partially
displayed on the television.
The disc’s menu is displayed in	≥Go to Disc in the SETUP menus, and select the preferred language for “Menus”.	16
a different language.

Maintenance

To clean this unit, wipe with a soft, damp cloth.

≥Never use alcohol, paint thinner or benzine to clean this unit.

≥Before using chemically treated cloth, read the instructions that came with the cloth carefully.

Glossary

Bitstream

This is the digital form of multiple channel audio data (e.g., 5.1 channel) before it is decoded into its various channels.

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 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 chan- nels and then is restored to 4 channels for play. The surround channel is monaural and can reproduce up to 7 kHz.

DTS (Digital Theater Systems)

This surround system is used in many movie theaters around the world. There is good separation between the channels, so realistic sound effects are possible.

Frame still and field still

Frames are the still pictures that go together to make a moving picture. There are about 30 frames shown each second.

One frame is made up of two fields. A regular television shows these fields one after the other to create frames.

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

I:Intra coded picture (I-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 or 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.

Reference

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.

Linear PCM (pulse code modulation)

These are uncompressed digital signals, similar to those found on CDs.

Playback control (PBC)

If a Video CD has playback control, you can select scenes and information with menus (called menu play in these instructions).

RQT6573

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