METHOD AND CIRCUIT ARRANGEMENTS FOR PROCESSING DIGITAL VIDEO SIGNALS

摘要

To save transmission capacity, only those parts of a single frame of a moving-picture signal (video signal) are transmitted in digital form which have changed compared with the preceding single frame as far as this is known to the receiver. The transmission coding process can be carried out with a continuous operating speed determined by the data rate of the transmission path since both the change decisions and the supplied uncoded frame data words are temporarily stored at the transmitter end for data processing and are supplied to the coding process after a variable delay. A temporary storage at the channel end can be omitted both in the transmitter and the receiver. The received frame data are directly decoded and the associated address data are used for updating the video information items located in the frame store which are only reproduced after a delay time - between zero and one frame period.