Yamaha AVX-S30 owner manual Glossary, Channel ch

ADDITIONAL INFORMATION

Glossary

■Channel (ch)

A channel is an audio type that has been divided based on range and other characteristics.

Ex. 5.1 channel

•Front speakers, Left (1ch), Right (1ch)

•Center speaker (1 ch)

•Surround speakers, Left (1ch), Right (1ch)

•Subwoofer (1 ch x 0.1* = 0.1 ch)

*In contrast to a full 1-channel band, a component designed to enhance low frequency sound for added effect.

■COMPONENT VIDEO OUT

Jacks for inputting or outputting a component video signal. Component video signal consists of three lines, the luminance signal (Y) and two color difference signals (PB/CB, PR/CR), which enable to provide high-quality video.

■DTS (Digital Theater Systems)

Digital surround sound system developed by Digital Theater Systems, Inc., which provides 5.1 channel audio. With an abundance of audio data, it is able to provide authentic-sounding effects.

■NTSC (National Television System

Committee)

NTSC is a video signal system (525 lines, 30 frames per second) used in North America, Central America, a number of South American countries, and some Asian countries, including Japan.

■PAL (Phase Alternating Line)

PAL is a video signal system (625 lines, 25 frames per second) used in the United Kingdom, much of the rest of western Europe, several South American countries, some Middle East and Asian countries, several African countries, Australia, New Zealand, and other Pacific island countries.

■Pan & Scan and Letterbox

In general, DVD Video is produced for viewing on a wide television screen with an aspect ratio of 16:9. This means you can now view most material with the intended aspect ratio on a wide-screen television.

This ratio will not fit on a standard television that has an aspect ratio of 4:3. Two picture styles, Pan & Scan and Letterbox, deal with this problem.

•Pan & Scan cuts off the left and right portions of the picture to fill the screen.

•Letterbox inserts black bands at the top and bottom of the picture to reproduce an aspect ratio of 16:9.

■PCM (Pulse Code Modulation)

A signal that is changed to digital format without compression. A CD is recorded with 16-bit sound at 44.1 kHz, while DVD recording is anywhere from 16 bits at 48 kHz to 24 bits at 192 kHz, which makes it a higher quality sound than CD. This signal also has a type called Packed PCM (PPCM) that can be compressed without any loss of data.

■Progressive scan

A method of displaying all scanning lines in a frame at once, reducing flicker noticeable on a larger screen and creating a sharp and smooth image.

■Sampling frequency

The number of sampling (process for digitalizing analog signals) per second. In principle, the higher the sampling rate, the wider the frequency range that can be played back, and the higher the quantized bit rate, the finer the sound that can be reproduced.

■Title, Chapter (DVD)

DVD video lets you divide a disc in a big way by titles or a small way by chapters. Each division is either called a title number or a chapter number.

■Track (CD/Video CD/Super Video CD)

A CD, VCD or SVCD can be divided into a number of segments (tracks). Each division is called a title number.

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