US 6,983,013 B1 | ||
Method and device for encoding video signal | ||
Pierre Gautier, Nogent-sur-Marne (France); Sandra Del Corso, Clamart (France); and Isabelle Lemaguet, Paris (France) | ||
Assigned to Koninklijke Philips Electronics N.V., Eindhoven (Netherlands) | ||
Appl. No. 9/806,091 PCT Filed Jul. 31, 2000, PCT No. PCT/EP00/07425 § 371(c)(1), (2), (4) Date Mar. 26, 2001, PCT Pub. No. WO01/10133, PCT Pub. Date Feb. 08, 2001. |
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Claims priority of application No. 99401969 (EP), filed on Aug. 03, 1999; and application No. 99403228 (EP), filed on Dec. 21, 1999. | ||
Int. Cl. H04N 7/12 (2006.01) |
U.S. Cl. 375—240 | 7 Claims |
1. A method for encoding video signals corresponding to a sequence of frames each of which originally consists of two fields
F1 and F2, in which the encoding step is preceded by a preprocessing step which itself comprises the sub-steps of:
(A) receiving the successive frames and delaying each of them with a delay of at least two fields;
(B) adjusting said delay according to the following dominance change criterion:
(a) when a change from an F1 dominance to an F2 dominance is detected, the first field of the first F2 dominant frame is suppressed, said delay being therefore decreased by a quantity equal to “one field” duration;
(b) when a change from an F2 dominance to an F1 dominance is detected, the last field of the last F2 dominant frame is repeated, the delay being therefore increased by a quantity equal to “one field” duration.
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