such as a full-length movie plus other supporting content. One layer of a DVD-Audio
stores 4.7GB of data, which means that each second on a DVD-Audio stores more than
1,100timesmoreinformationthanonesecondonanaudioCD.OneDVD-Audiocanhold
up to 400 minutes of 2-channel stereo sound or 74 minutes of 6-channel sound.
The DVD was designed to be backward compatible with an existing CD-ROM, which
means DVD drives are able to read the CD formatting. The DVD uses a read mechanism
that includes a dual focus pick-up to read the disc. The DVD is the same size as a
CD-ROM, and the DVD drive uses the same form factor as the CD-ROM drive, but the
formatting on the DVD is considerably different than that used on the CD. Table 10-2
shows a comparison of a DVD-Audio to a CD-DA.(^216) PC Hardware: A Beginner’s Guide
Figure 10-11. A DVD loaded to a DVD drive
Feature DVD-Audio (single layer) CD
Capacity 4.7GB 640MB
Recording time 200 minutes 74 minutes
Transfer rate 9.6Mbps 1.4Mbps
Max sampling rate 192kHz 44.1kHZ
Table 10-2. Comparison of DVD and CD