| 摘要 |
For future digital television broadcasting and the interactive communications services associated therewith, video data must be greatly reduced in terms of their volume of data by means of suitable coding devices. One coding method provided for this is the MPEG2 standard. If, during the coding, a change in the picture scene occurs within successive Groups of Pictures, no rational basis for the prediction of the B and P frames exists for the current Group of Pictures. As a result, the reconstruction result in the decoder will remain unsatisfactory. According to the invention, such scene changes are detected and the first picture of the new scene is intraframe-coded. |
