| 摘要 |
<p>The bit rate of a data stream having the following characteristics is modified. The data stream comprises control words. A control word defines when a data portion comprised in the data stream has to be read from an input buffer at a receiving end. An MPEG video data stream has such characteristics. It is calculated, for at least one future instant in time (Tfut), within which bounds (Rmax, Rmin) the bit rate (R) of the data stream can be modified at that future instant in time, so as to cause neither underflow nor overflow of the input buffer. The bit rate is modified at a future instant in time within the bounds (Rmax, Rmin) which have been calculated for the future instant in time. This allows a fast modification of the bit rate which generally contributes to the quality of the data comprised in the data stream.</p> |
