To save transmission capacity, only those parts of a frame of a moving-image signal (video signal) are transmitted in digital form which have changed compared with the preceding frame as far as this is known to the receiver. The transmission coding process can run at a continuous operating speed determined by the data rate of the transmission path since both change decisions and the supplied uncoded image data words are temporarily stored and, after a variable delay, are supplied to the coding process for the data processing on the transmitter side. A channel-side buffer storage can be omitted both in the transmitter and in the receiver. The received image data are directly decoded and the associated address data are used for updating the image information located in the frame buffer, which information is only reproduced after a delay time - between zero and one frame period.
申请公布号
DE3310410(C2)
申请公布日期
1991.06.06
申请号
DE19833310410
申请日期
1983.03.18
申请人
HEINRICH-HERTZ-INSTITUT FUER NACHRICHTENTECHNIK BERLIN GMBH, 1000 BERLIN, DE
