Data storage device
US6490109B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 8, 2000 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Nov 8, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is provided a data storage device concurrently allowing storage of data that can be reproduced in higher quality and storage of data that can be used also in a data transmission path with a lower transfer speed. The data storage device comprises an A/D converter 103 for sampling analog audio signals based on a sampling frequency, a DSP 104 for compressing sample data sequentially output from the A/D converter 103, a storing and reading control unit 107 for storing the compressed data sequentially output from the DSP 104, and a control unit 105 for controlling the DSP 104 and the storing and reading control unit 107 for dividing the sample data sequentially output from the A/D converter 103 into a group under odd number of turns and a group under even number of turns, compressing the groups at each different compression rate and storing them on different storage areas A and B, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.