APPENDIX

Glossary

Glossary

Digital Sound Projector

Ordinarily, two front speakers, a center speaker, two surround speakers, and a subwoofer are necessary for enjoying 5.1 channel surround sound.

Typical 5.1 channel speaker system

Front speakers

Subwoofer

Center speaker

Surround speaker

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.

Channel (ch)

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

Ex. 7.1 channel

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

•Center speaker (1ch)

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

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

•Subwoofer (1ch × 0.1* = 0.1ch)

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

■7.1 channel surround playback

This unit creates surround sound by reflecting projected sound beams off the walls of your listening room.

The sound image of the system

Dolby Digital

Digital surround sound system which is developed by Dolby Laboratories provides completely independent multi-channel audio. With 3 front channels (left, center, and right) and 2 surround stereo channels, Dolby Digital provides five full-range audio channels. By using 2 channel stereo for the surround speakers, more accurate moving sound effects and surround sound environment are possible than with Dolby Surround.

Dolby Digital Plus

Dolby Digital Plus is an advanced audio technology developed for high-definition programming and media including HD broadcasts, and Blu-ray Disc. Selected as an optional audio standard for Blu-ray Disc, this technology delivers multichannel sound with discrete channel output. Supporting bitrates up to 6.0 Mbps, Dolby Digital Plus can carry up to 7.1 discreet audio channels simultaneously. Supported by HDMI and designed for the optical disc players and AV receivers/amplifiers of the future, Dolby Digital Plus also remains fully compatible with the existing multichannel audio systems that incorporate Dolby Digital.

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