Patent ID: 8514335

Claim:
A transceiver comprising: a transmission device that includes: a first transmission unit that transmits video data in a first frequency band; a second transmission unit that transmits video data over a second frequency bandwidth smaller in transmission capacity, and wider in transmission range, than the first frequency band; and a transmission side control unit that controls said first and second transmission units, and a reception device that includes: a first reception unit that receives video data transmitted by said first transmission unit; a second reception unit that receives video data transmitted by said second transmission unit; and a reception side control unit that controls said first and second reception units wherein if it is detected that a reception quality of video data received by said first reception unit is degraded below a predetermined threshold while video data is transmitted and received in the first frequency band, said reception side control unit notifies control information, which indicates the degradation, to said transmission side control unit, said transmission side control unit detects a frequency bandwidth usable by said second transmission unit based on the control information which indicates the degradation and, when a usable frequency bandwidth is determined, causes said second transmission unit to transmit video data over the determined frequency bandwidth and, at the same time, notifies control information, which indicates the determined frequency bandwidth, to said reception side control unit, and said reception side control unit causes said second reception unit to receive video data based on control information which indicates the determined frequency bandwidth.