VIDEO SIGNAL TRANSMISSION DEVICE, VIDEO SIGNAL TRANSMISSION METHOD, VIDEO SIGNAL RECEPTION DEVICE, AND VIDEO SIGNAL RECEPTION METHOD

摘要

It is possible to preferably transmit a video signal of a desired bit rate within a transmission bit rate of a transmission path. A control unit (111) controls operations of data compression units (121-1 to 121-n) and a switch unit (122). When a bit rate BR1 of a non-compressed video signal outputted from a codec (117) is within a transfer bit rate BR2 of an HDMI transmission path, the control unit (111) supplies the non-compressed video signal outputted from the codec (117) as a video signal to be transmitted, to an HDMI transmission unit (102). On the other hand, when the bit rate BR1 is greater than the transfer bit rate BR2, the control unit (111) selects a compression method with which the reception side is compatible, performs a compression process so that the bit rate BR1 is lower than the bit rate BR2, and supplies the compressed video signal as a video signal to be transmitted, to the HDMI transmission unit (102). Moreover, the control unit (111) transmits the compression information (control information on the switch unit 122 and the data compression units 121-1 to 121-n) to the reception side.