Canon Kabushiki Kaisha

Eiji Oyama

Nobutoshi Takayama

Shinichi Koyama

Masahito Natsume

Kunio Sakurai

Sakae Hori

A signal processing apparatus comprises an input unit for inputting first image data having a first resolution, a resolution converting unit for converting the resolution of the input first image data and outputting second image data having a second resolution which is lower than the first resolution, a character data producing unit for producing first character data in accordance with the second resolution, an enlargement unit for enlarging the first character data to produce second character data in accordance with the first resolution, a first multiplexing unit for multiplexing the input first image data and the second character data to produce first multiplex image data, and a second multiplexing unit for multiplexing the second image data output from the resolution converting unit and the first character data output from the character data producing unit to produce second multiplex image data.

Image processing apparatus

A video signal processing apparatus is arranged to process a composite information signal which is formed by multiplexing first and second information signals having different frequency bands. When the composite information signal recorded on a recording medium is reproduced, the first information signal is extracted from the reproduced composite information signal and a first detection signal is obtained by subjecting the extracted first information signal to a detection process. The second information signal is also extracted from the reproduced composite information signal and a second detection signal is obtained by subjecting the extracted second information signal to a detection process. The first and second detection signals are compared with each other. A correction process is performed on the composite information signal reproduced from the recording medium according to the result of comparison. The reproduced composite information signal can be adequately corrected by virtue of the arrangement.

Information signal reproduction apparatus

An information signal output apparatus is adapted, when controlling the amplitude of an input information signal to be a predetermined level, to control the speed of response of the amplitude control in accordance with the status of the input information signal. The apparatus is thereby able to output an input information signal without deteriorating the signal.

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Yokohama, Japan

Eiji Oyama