DVD playback system capable of playing two subtitles at the same time
US6775467B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 2000 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Aug 23, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/426
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A DVD playback system, associated with a DVD storage media. It comprises a loader, a system parser, a decoding device and a video/sub-picture composer. The loader system is for reading the digital data tagged with stream IDs from the DVD storage media, a primary sub-picture control signal (SP1) from the navigator, and a secondary sub-picture control signal (SP2) from the user interface. The system parser and the decoding device are for dividing the digital data into an video stream, at least one audio stream, a primary sub-picture stream and a secondary sub-picture stream and then decoding each individual stream separately into video signal, audio signal and sub-picture signal. The sub-picture signal comprises of aprimary sub-picture and a secondary sub-picture signals; The video/sub-picture composer is for mixing the video signal and the sub-picture signal to generate the video output, while the audio output module is for generating the audio output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.