Patent ID: 6823399
Filing Date: 2004-11-23
Classification: H04L

Abstract:
An apparatus controlling method for performing control between apparatuses connected to a predetermined bus line,wherein in an audio/video stream data transmission between a first apparatus and a second apparatus, presetting of settings for inputting or outputting the audio/video stream of data in the first apparatus is directed by a transmission of a command in a predetermined format via the bus line, wherein an identification data unique to the second apparatus is transmitted upon the transmission of the command, and the first apparatus stores the transmitted unique identification data when performing the presetting in accordance with the command; and when the audio/video stream data transmission between the first apparatus and the second apparatus is preset and a third apparatus sends another command to the first apparatus, the first apparatus rejects the other command, and the third apparatus sends a status command to the second apparatus requesting identification information relating to the second apparatus for reporting an error message.