Patent · US Active

Method data recorder for recording data packet timestamps

US7634174B2 · kind B2 · utility

1Cited by

6References

10Claims

0Family size

Assignee

Thomson Licensing · FR

Inventors

Dirk Adolph · Ronnenberg, DE
Wolfgang Klausberger · Hannover, DE
Hui Li · Beijing, CN
Ralf Ostermann · Hannover, DE

Key dates

Filing date	Sep 3, 2001
Grant date	Dec 15, 2009
Priority date	—
Expiry date	Nov 26, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH04N5/85
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

DVD Rewritable/Re-recordable discs will be used for recording and playing back digital bitstreams, for example MPEG data packets. To enable proper real-time playback of stored MPEG transport packets, a time information is to be added to every data packet to be recorded. A DVD streamer is connected to the application device via an interface, e.g. IEEE 1394. The interface internally uses timestamps having a special format. According to the invention, such interface-generated timestamps are also used for the DVD stream recording, instead of additionally generated independent streamer-specific timestamps. However, a timestamp format conversion is to be carried out because the DVD Streamer timestamp format is different from the IEEE 1394 timestamp format. For such timestamp format conversion differences between consecutive IEEE 1394 timestamps are determined and are used for calculating the DVD stream recording timestamps.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.