1. An integrated circuit for video/audio processing that processes video and audio signals, comprising: a microcomputer block including a CPU; a stream input/output block operable to receive/output video and audio streams to and from an external device, under the control of said microcomputer block; a media processing block operable to execute media processing including at least one of compression and decompression of the video and audio streams inputted to said stream input/output block or outputted from said stream input/output block under the control of said microcomputer block; an AV input/output block operable to convert the video and audio streams subjected to the media processing in said media processing block and output the video and audio streams to an external device, or acquire the video and audio signals from the external device and convert the video and audio signals into video and audio streams to be subjected to the media processing in said media processing block, under the control of said microcomputer block; and a memory interface block operable to control data transfer between a memory and said microcomputer block, said stream input/output block, said media processing block and said AV input/output block, under the control of said microcomputer block,