Nec Corporation

Nippon Hoso' Kyokai

Takeo Tsutsui

Yutaka Tanaka

Masashi Onosato

Nozomu Hasegawa

Masakazu Tsuji

Masatoshi Yorozu

Chokei Shikina

Teruo Takayanagi

Yasushi Kimura

A method and an apparatus for image processing capable of solving the problem of out of standard image signals, with a least amount of a deterioration of the image quality and a distortion of the image produced at the central region of the image. In this apparatus, the out of standard image signals having missing portions are treated by a horizontal blanking width correction process in which only those parts of the video signals corresponding to horizontally peripheral regions of the image are enlarged to supplement the missing portions of the video signals, and then the parts of the video signals corresponding to the central region of the image and the horizontally peripheral regions of the image are combined to obtain full video signals without missing portions.

Image processing with horizontal blanking width correction

In a television signal frame number converter for converting an input television signal having a first frame number per second into an output television signal having a second frame number per second in accordance with an interpolation coefficient, a processing unit processes two successive frames of the input television signal by a frame interpolation process to produce a processed signal. A memory unit memorizes the processed signal in synchronism with a write-in address signal given by a first frame synchronizing signal of the input television signal and is read out by a read-out address signal given by a second frame synchronizing signal of a reference television signal having the second frame number per second. The converter determines the interpolation coefficient in accordance with a time interval between a write-in start timing of the memory unit and a read-out start timing of the memory unit.

Television signal frame number converter capable of determining an

Growing community of inventors

Tokyo, Japan

Takeo Tsutsui