Microprocessor suitable for reproducing AV data while protecting the AV data from illegal copy and image information processing system using the microprocessor
US6044157A · kind A · utility
63Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1997 |
| Grant date | Mar 28, 2000 |
| Priority date | — |
| Expiry date | Mar 10, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91328
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A microprocessor used in an image information processing system is provided. The microprocessor includes: decryption unit 59 for decrypting the encrypted compressed AV data; IDCT unit 58 for performing an inverse DCT to decompress the decrypted compressed AV data; and microprogram memory 54 for storing microprograms for executing the AV data reproduction instruction which performs decryption and decompression of the encrypted compressed AV data inseparably by using the decryption unit 59 and IDCT unit 58.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.