When the input output controller 22 receives request data through the modem 42, the input output controller 22 controls the memory controller 25 to retrieve an AV stream and a BGV stream from the memories and to transfer the streams to the multiplexer 30. The memory controller 25 retrieves a BGV stream...http://www.google.com.tw/patents/US6022223?utm_source=gb-gplus-share專利 US6022223 - Video/audio data supplying device
