JVC SP-UXA7DVD, CA-UXA7DVD, UX-A7DVD manual Disc Structure, About audio formats

About audio formats

Some audio formats used on discs are described below:

•Linear PCM

Uncompressed digital audio, the same format used on CDs and most studio masters.

DVD supports 2-channels at sampling rates of 48/96 kHz and quantization of 16/20/24 bits.

Audio CD/Video CD is limited to 2-channels at 44.1 kHz at 16 bits.

•Dolby Digital

A surround audio format configured with up to six channels. Because the “LFE (Low-Frequency Effect for sub-woofer, etc.)” channel is an auxiliary channel, so this format is called “5.1-channel system.”

Not all Dolby Digital discs contain six (5.1) channel information.

•DTS (Digital Theater Systems)

A surround audio format configured with up to six (5.1) channel which is the same as Dolby Digital. Because the compression ratio is lower than for Dolby Digital, it provides wider dynamic range and better separation. Not all DTS discs contain six (5.1) channel information.

•MPEG Multichannel

A surround audio format which can handle the augmentative 7.1-channel format (rare for home use), as well as 5.1-channel.

IMPORTANT:

•This unit does not provide the DTS decoding function.

The sound signals of DTS are only output through the DVD OPTICAL DIGITAL OUT terminal and are not output through the speakers of this unit.

To listen to the sound of DTS, connect a DTS decoder or an amplifier compatible with DTS.

•To reproduce the multichannel sounds such as Dolby Digital 5.1 ch, DTS Digital Surround and MPEG Multichannel, connect an amplifier or a decoder compatible with these multichannel sources to this unit. (See page 11.)

•Playing back an Audio CD whose sound is encoded with DTS may generate noise and damage the speakers.

When playing such a disc, turn the volume level on this unit to minimum.

Disc Structure

A DVD consists of “titles,” and each title may be divided into “chapters.” (See Example 1.)

For example, if a DVD disc contains some movies, each movie may have its own title number, and it may be further divided into chapters.

Example 1: DVD

On the other hand, a SVCD, VCD, and Audio CD consist of “tracks.” (See Example 2.)

In general, each track has its own track number. (On some discs, each track may also be divided by Indexes.)

Example 2: SVCD/VCD/Audio CD

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