US 4,731,651 AGranted

Apparatus for compensating a movement of a picture of television signal

AssigneeSony Corporation

InventorsKunio Matsumoto, Akira Furutani, Yutaka Tanaka, Toshiro Ohmura, Taiichiro Kurita, Yoshimichi Ohtsuka, Taiji Nishizawa, Yuichi Ninomiya

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Abstract

Image movement correction is provided in a field conversion television system by deriving simultaneously two fields of a selected number of lines from an original single field and vertically shifting one of the derived fields by 0.5 lines. A movement vector is determined for each field and movement correction is performed based on a current field and a preceding field, in the case of a moving object in the image. If no moving object is present linear approximation is employed to correct for motion caused by the field number conversion. Two memory systems are provided for the two simultaneous fields and also to selectively obtain specific horizontal lines of the current and preceding fields, relative to both simultaneous derived fields. Ultimate selection of a field for display is based upon the detected movement vector.

Claims14

Dependent claims

Apparatus for correcting movement of a television signal picture image in a vertical direction, comprising:

means for detecting movement of a picture image between successive fields of a television signal and producing a vector signal indicating a magnitude and a direction of said detected movement;
first memory means for storing a first field of the television signal therein;
second memory means for storing a second field of the television signal therein;
and
switching means for selecting the stored first and second fields of the television signal from said respective first and second memory means in response to said vector signal;
in which said first memory means comprises a first field memory for delaying the television signal for an interval of at least one field to produce the television signal in the preceding first field and a first pair of memories for respectively storing the data in the same line of the current and preceding first fields.

3 more elements

Dependencies are inferred from the claim text.