Verfahren zur Bewegtbilddatenkompression und Kodiervorrichtung zur Durchführung des Verfahrens

摘要

The invention concerns a method and a coding device for compressing moving image data, wherein frames (Ft, Ft-1) from a video-camera are divided into macro blocks and a movement vector is determined with respect to each macro block of a frame by comparison with macro blocks of a chronologically earlier reference frame. According to the invention, the preceding unprocessed image from the video-camera is first used as the reference frame (Ft-1) and, on the basis of this reference frame (Ft-1), an approximation movement vector (V) is determined with respect to each macro block. Subsequently, proceeding from the determined approximation movement vector (V), a movement vector refined search is carried out in a further reference frame (F't-1), which is generated by decoding the coded preceding image (Ft-1). The invention permits moving image data compression which is characterized by the short latency of the individual frames in the coder, and permits a faster frame rate during coding.