Glossary
Term | Meaning | Page |
Refers to music CDs. Almost all discs normally referred to as | 24 | |
| “CDs” are actually |
|
|
|
|
MP3 | An audio compression method developed by Germany's | 25 |
| Fraunhofer IIS, which achieves high rates of data compression |
|
| by discarding data not readily audible to humans. MP3 can |
|
| compress data down to rates of approximately 1/11 (128 |
|
| kbps) while retaining sound quality equivalent to a music CD. |
|
|
|
|
USB hub | An adapter that provides simultaneous connection of | 26 |
| multiple USB devices. |
|
|
|
|
USB mass storage | A standard for computer control of a USB device. It also makes | 16, 24 |
class | it possible for a computer to recognize a connected USB |
|
| device as an external storage device. |
|
|
|
|
VBR | A system that varies the amount of data per time segment in | 25 |
(Variable Bitrate) | accordance with the music data volume. |
|
|
|
|
WMA | An abbreviation for the “Windows Media™ Audio” audio | 25 |
| compression and encoding system developed by Microsoft |
|
| Corporation of the U.S. |
|
|
|
|
Sampling frequency | A value that indicates the number of times per second analog | 25 |
| signals are sampled for conversion to digital signals. The |
|
| sampling frequency for music CDs is 44.1 kHz. Normally, the |
|
| higher the sampling frequency, the better the sound quality. |
|
|
|
|
Bitrate | A value indicating the amount of information processed per | 25 |
| second. The higher the bitrate, the better the sound quality. |
|
|
|
|
82