Nec Corporation

Keiichi Hirayama

Kazuo Kashigi

Shigehisa Kawabe

A video composing system for producing special effects comprising two special effect circuits each of which includes: a video display, a write-in address generator, a read-out address generator responsive to special effect signals, and a depth data generator for generating depth data according to the read operation. Also included is an image mixer for mixing video signals received from the two special effect circuits and a comparator for comparing data received from the two special effect circuits and for producing a control signal based thereon. Taking into consideration the depth parameter produces more naturally appearing video images.

Video composing system using special effect apparatus

A television video signal processing circuit for imparting to a television picture special effects includes special function generators and picture pixel distance calculating circuits which enable pixels to be rearranged to create a special effect such as the folding of a portion of the picture unto itself or the rolling up thereof with reference to a predesignated straight line. A brightness contrast control circuit alters the brightness information in certain portions of the picture to accentuate given regions thereof so that the image appears to the viewer as if it were three dimensional.

Special effect system for video signal

A circuit for processing television signals to produce special effects includes a special effects circuit and a key signal generating circuit. Instead of generating the key signal separately and tailoring it for the desired special effects by using complicated circuits, the key signal is superimposed onto a video signal to produce a composite video signal which signal is processed to conform to the desired special effects. After the processing, the key signal is separated from the composite video signal to be used as it is intended. Thus, complicated and dedicated circuits solely for use for processing the key signal are eliminated.

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Tokyo, Japan

Keiichi Hirayama