An image of an object is picked up by an image processing unit (10) to acquire an image signal of variable frame rate. An audio signal is acquired by an audio processing unit (20) to generate an audio signal having the number of frames caused to be in conformity with the system frame rate to generate a recording signal of recording frame rate from the image signal of the variable frame rate and an audio signal having the number of frames caused to be in conformity with the system frame rate. In recording a recording signal of the recording frame rate onto or into a recording medium (35) by a recording/reproducing unit (30), discrimination information indicating image pick-up frame rate and system frame rate is recorded onto or into the recording medium (35), e.g., as MXF (Material Exchange Format) file along with the image signal of the variable frame rate and the audio signal having the number of frames caused to be in conformity with the system frame rate.
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