Moving image coding method, moving image coding device, moving image recording method, recording medium, moving image playback method, moving image playback device, and moving image playback system
US8023804B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2007 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | Jan 2, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/8205
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A moving image coding method that can prevent playback discontinuity without an increase in processing load during playback is provided.The moving image coding method codes a video stream that includes a first moving image and a second moving image to be overlaid on the first moving image. The moving image coding method includes: a step of determining a continuous playback section that is a group of partial sections and is subject to continuous playback, in the video stream (S5301 to S5303); a step of coding the first and second moving images in the partial sections constituting the continuous playback section, under a constraint that prevents a threshold from being changed in the continuous playback section, the threshold being used for a transparency process by a luminance key in the overlaying (S5304); and a step of generating management information including flag information which indicates that the threshold is fixed in the continuous playback section (S5305).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.