| 摘要 |
<p>The invention relates to a process for forming a field of movement vectors to be used in transmission of information relating to moving pictures. These are represented by image points with one block (Y) for the luminance and two blocks (U/V) for the chrominance. Each picture is divided into macro picture elements comprising a number of image points from each respective block which correspond to the same physical picture area. A number of previously formed and transmitted movement vectors for adjoining macro picture elements are tested with regard to the current macro picture element by means of a first criterion. If this is satisfied, the indication is that the movement vector in question is suitable for the current macro picture element (X). If more than one of the movement vectors thus tested are suitable, one is selected by means of a second criterion. If none of the movement vectors tested is suitable, a new movement vector is sought with any other possible method.</p> |
