VIDEO SIGNAL PROCESSING APPARATUS FOR CONVERTING A FRAME VIDEO SIGNAL REPRESENTING A PLURALITY OF VIDEO FRAMES INTO A FIELD VIDEO SIGNAL REPRESENTING A PLURALITY OF VIDEO FIELDS.

摘要

A VIDEO SIGNAL PROCESSING APPARATUS AND METHOD FOR CONVERTING A FRAME-UNIT VIDEO SIGNAL INTO A FIELD-UNIT VIDEO SIGNAL. THE APPARATUS INCLUDES A MEMORY (33, 34) FOR STORING THE FRAME-UNIT VIDEO SIGNAL, A CONTROL CIRCUIT (35, 36) FOR CONTROLLING READING OF THE STORED FRAME-UNIT VIDEO DATA FROM THE MEMORY SO AS TOOBTAIN THE FIELD-UNIT VIDEO SIGNAL HAVING FIELDS WHICH ARE ARRANGED IN A DESIRED ORDER, AND A VERTICAL FILTER (32, 95) WHICH RECEIVES THE FIELD-UNIT VIDEO SIGNAL READ FROM THE MEMORY. THE VERTICAL FILTER SHIFTS A CENTROID OF A PICTURE REPRESENTED BY THE RECEIVED VIDEO SIGNAL IN ACCORDANCE WITH AT LEAST ONE COEFFICIENT WHICH IS SELECTIVELY SET BASED UPON THE FIELD ORDER. THE READING OF THE VIDEO SIGNAL MAY BE CONTROLLED SO AS TO OPERATE AS A DELAY DEVICE THEREBY ELIMINATING THE NEED FOR SUCH DELAY DEVICE IN THE VERTICAL FILTER. WHEN APPLIED TO A DIGITAL VTR OR THE LIKE, THE PRESENT APPARATUS PREVENTS LINE FLICKER AND SUPPRESSES PLANE FLICKER. (FIGURE 1)