image data the signal processing dsp 202 controls the recording medium interface 104 the memory bus controller 102 and the extended bus interface to read the image data from the recording medium 101 the image data is supplied to the pickup image signal processing circuit 203 the image data is processed by the pickup image signal processing circuit 203 into luminance and color information the output of the pickup image signal processing circuit 203 is thinned if necessary according to the image size of the image display buffer memory 12 by the thinning out process circuit 204 and is transferred to the buffer memory 205 after completion of transfer of the luminance and color information to the buffer memory 205 the thinning out process circuit 204 notifies the signal processing dsp 202 of completion of the transfer upon receipt of this notice the signal processing dsp 202 transfers the luminance information data of the buffer memory 205 to the image display buffer memory 12 by controlling the extended bus interface and the memory bus controller 102 2 5 2 reproduction of compressed images on the recording medium in a case where an image file recorded on the recording medium consists of compressed image data the signal processing dsp 202 reads out the compressed image data from the recording medium 101 by controlling.