Abstract: Also in a video system in which a device responding to a multiple screen display function and a non-responding device are mixedly present, a communication message for a collaboration of the device which performs a multiple screen display operation is realized without exerting an influence on operations of the non-responding device. A video device including two or more video input ports and capable of simultaneously receiving videos output from multiple video source devices connected to the video input ports is configured so as to perform a predetermined filtering operation or message conversion when transmitting to the other video input ports a communication message for video device control to be converted through the video input ports.

Abstract: An information processing device is provided with plural HDMI connectors through which an audio signal is supplied to the other information processing device. The device allows selection of an audio signal supply destination. The audio signal supply is requested, and the audio signal is supplied to the specified information processing device in the requested arriving order. The information processing device of a specific type is determined as a priority device which is preferentially selected to receive the audio signal. If the information processing device of specific type is determined as the priority device, and supply of the audio signal therefrom is requested, the audio signal is supplied to the priority device by terminating the audio signal supply to the other information processing device. The audio signal may be supplied to plural supply destinations.

Abstract: Also in a video system in which a device responding to a multiple screen display function and a non-responding device are mixedly present, a communication message for a collaboration of the device which performs a multiple screen display operation is realized without exerting an influence on operations of the non-responding device. A video device including two or more video input ports and capable of simultaneously receiving videos output from multiple video source devices connected to the video input ports is configured so as to perform a predetermined filtering operation or message conversion when transmitting to the other video input ports a communication message for video device control to be converted through the video input ports.

Abstract: An information processing device is provided with plural HDMI connectors through which an audio signal is supplied to the other information processing device. The device allows selection of an audio signal supply destination. The audio signal supply is requested, and the audio signal is supplied to the specified information processing device in the requested arriving order. The information processing device of a specific type is determined as a priority device which is preferentially selected to receive the audio signal. If the information processing device of specific type is determined as the priority device, and supply of the audio signal therefrom is requested, the audio signal is supplied to the priority device by terminating the audio signal supply to the other information processing device. The audio signal may be supplied to plural supply destinations.