Digital signal transmitting method, digital signal receiving apparatus, and recording medium and method
USRE38236E1 · kind E1 · reissue
5Cited by
11References
28Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 23, 2000 |
| Grant date | Aug 26, 2003 |
| Priority date | — |
| Expiry date | Feb 23, 2020 |
Classification
- Technology area (CPC —)General
Abstract
A digital signal transmitting method, a digital signal receiving apparatus, and a recording medium which ensure the security of fee-charged software information. When an image providing predetermined services is transmitted, a band-compression coded digital video signal is given first-encryption processing and then the digital signal is further given encryption processing and transmitted. Therefore, double security can be added to the video signal and a digital signal transmitting method where its security is more firmly ensured can be realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.