Transport stream encryption device and its editing device and method for use therein
US8243926B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2004 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Sep 9, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91364
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An encryption device, comprising: detection portion for detecting a TS header, a PES header, a sequence header, a GOP header, and a sequence end code for a transport stream not encrypted; and encryption portion for encrypting the transport stream except the TS header, the PES header, the sequence header, the GOP header, and the sequence end code. An editing device, comprising: detection portion for detecting a TS header, a PES header, a sequence header, a GOP header, and a sequence end code in a transport stream; and editing portion for editing the encrypted transport stream without decryption in units of TS packets ranging from a TS packet where the GOP header is detected to a TS packet previous to a TS packet where a subsequent GOP header is detected out of TS packets having an identical PID.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.