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USOO5835147A
United States Patent Florentin et al.
[19] Patent Number:
Date of Patent:
[11] 5,835,147 [45] Nov. 10, 1998
[54] METHOD FOR COMPRESSION AND Primary Examiner—HoWard Britton DECOMPRESSION OF A VIDEO SIGNAL Attorney, Agent, or Firm—Ladas & Parry
[75] Inventors: Itzhak Florentin, Mobile Post Misgav; [57] ABSTRACT Itzhak Messing, Haifa, both of Israel _ _ _ _ _
A method for transmitting a sequence of images is provided. [73] Assignee; State of Israel/Ministry of Defense The method includes the steps of previously de?ning that the
Armament Development sequence of images includes a plurality of frame segments Authority-Rafael, Haifa, Israel and that each of the segments includes tWo types of images,
update frames and intermediate frames, encoding and trans [21] App1_ No; 749,493 mitting the sequence of images and decoding the transmitted
_ sequence of images. When an update frame is present, the [22] Flled: NOV‘ 15’ 1996 step of encoding and transmitting includes the step of [30] Foreign Application Priority Data compressing and transmitting the update frame. When an
intermediate frame is present, the step of encoding and Nov. 19, 1995 [IL] Israel ...................................... .. 116060 transmitting includes the Step of generating and transmitting
[51] Int. Cl.6 .............................. .. H04N 7/48' H04N 7/36 intermediate global motion parameters describing motion [52] 348/416 348/416 betWeen the update frame and the intermediate frame. When
, ’ the compressed update frame is received, decoding the [58] Field of Search ................................... .. 348/409, 413, - - - transmitted sequence of images includes the step of decom
348/416; H04N 7/36, 7/48 . pressing the compressed update frame to produce a trans [56] References Cited mitted update frame. When the intermediate motion param
eters are received, decoding the transmitted sequence of US. PATENT DOCUMENTS images includes the step of Warping the transmitted update
frame With the intermediate motion parameters thereby to 4’989’087 1/1991 Pele """" " 348/416 roduce a transmitted intermediate frame 5,305,400 4/1994 Butera . . . . . . . . . . . . . . . . . .. 382/56 p '
5,646,691 7/1997 Yokoyama .... .. 348/416 5,706,055 1/1998 Katto ..................................... .. 348/409 8 Claims, 7 Drawing Sheets
I_|__________T___—___—__T______—__;TI F'___—_'_—_—__|_ I
| l g I I FRAME l |
VIDEO IN! PRE- STORE MOTION } PROCESSOR _ — _ FOR NEW _ _ " ESTIMATOR | |
FRAME |
/ / I I 59 I | l I 20 22J 58 I | . i I I I l I I I l I I L — — |
I l
66\ I i | I : I r- ——————————————— — — -> FRAM E : I
I r___- PREDICTOR _________ __p__ i I I
' 64 I D so ' I K IP I : I 1 + f I .
I l
FORFRQAEAEO'ZAgIAROURgTED T ____ _ Pu" oEcoFlIgtheI-Essote *"_ coMFPRRAéAsEsmN I l UPDATE FRAME ; I
I I I I ' |
I : | 68 A OUTPUT *——'_|
BUFFER "
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