Kabushiki Kaisha Toshiba

Yuichi Honda

Shigeki Kamimura

An embodiment has a C separating circuit which separates a carriage color signal and which outputs a reference, a lead, and a delayed composite video signals, a filter that extracts a high-frequency carriage color component with a significant variation in hue from the carriage color signal, a first calculation circuit which outputs a first luminance signal, a second calculation circuit which subtracts the carriage color signal from each of the reference, the preceding lead, and the delayed composite video signals and which derives a second luminance signal having an intermediate value, and a selection circuit which outputs the second luminance signal when the high-frequency carriage color component has a value larger than the reference value and which derives the first luminance signal when the high-frequency carriage color component has a value smaller than the reference value.

Luminance signal/carriage color signal separating circuit and method

A cross-color/dot interference reduction circuit according to one embodiment of the present invention includes a signal generation unit configured to calculate a difference in an input signal between adjacent frames and generate a difference signal, a component extraction unit configured to extract a cross-color/dot interference component from the difference signal, a combination output unit configured to combine an interference reduction signal corresponding to the cross-color/dot interference-component with the input signal and provide an output signal with a reduced cross-color/dot interference, an image scene analysis unit configured to analyze an image scene contained in the input signal, and a signal amplification/attenuation unit configured to amplify/attenuate the interference reduction signal based on an image scene analysis result from the image scene analysis unit.

Cross-color/dot interference reduction circuit, imaging apparatus having cross-color/dot interference function, and cross-color/dot interference reduction method

According to one embodiment, a noise reducing circuit includes a frame memory configured to frame-delay a video signal, a first arithmetic unit configured to subtract the frame-delayed video signal given by the frame memory from the video signal to output a first frame difference signal, a first rectangular wave removing unit configured to remove a rectangular wave component from the first frame difference signal to generate a second frame difference signal, a first pulse discriminating unit configured to receive the second frame difference signal, remove a continuous pulse component from the second frame difference signal, and output a single pulse component, and a second arithmetic unit configured to subtract the single pulse component from the video signal.

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Fukaya, Japan

Yuichi Honda