| 摘要 |
In video motion vector generation and compensation, it is common for the chrominance sampling rate to be half the luminance sampling rate. When only a luminance motion vector is used, there can be rounding problems if either the horizontal or vertical motion vector (or both) is odd valued and the luminance motion vector is divided by two to generate a chrominance motion vector. For this reason, the luminance motion vector is provided with an additional bit for either or both axes if odd valued, and a rounding decision, if necessary, is made on the basis of the digital value of the additional bit. |
