converted by the ad converter 231 an image compression section 242 compresses image data by performing dct discrete cosine transform huffman encoding etc the image compression section 242 compresses image data by a compression format complying with for example mpeg motion picture experts group 2 or h 264 standard note that the system 100 may handle any data without limitation to data having a format complying with mpeg 2 or h 264 in cases where compressed image data output from the system decoder 256 is reproduced in the lcd monitor 264 etc an image expansion section 243 decodes this image data to a non compressed state the microphone 250 captures sound and generates audio data in order to support an input of stereo audio or multi channel audio the microphone 250 may include a plurality of microphone units the audio processing section 251 performs various processing operations on the audio data from the microphone 250 the audio processing section 251 generates audio data to be input to the system encoder 255 or generates audio data to be output to the speaker 265 the audio processing section 251 performs audio processing operations on audio data output from the system decoder 256 and generates audio data to be output to the speaker 265 or generates audio data to be input again to the.