According to an embodiment a signal multiplexing apparatus includes a clock selector, a data selector, and a converter. The clock selector selects either a first clock signal synchronized with a first data signal or a second clock signal different from the first clock signal to obtain a third clock signal. The data selector selects a subset of a first signal set at each timing controlled by the third clock signal to generate a first parallel signal. The first signal set includes the first data signal and a second data signal whose speed is lower than a speed of the first data signal. The converter converts the first parallel signal into a serial signal in accordance with the third clock signal.

Systems, methods, and devices perform synchronization operations for video streams. Methods include receiving a video frame at a frame capture unit, the video frame being included in a stream of video data, buffering the video frame using a buffer coupled between the frame capture unit and a frame display unit, and determining an offset value based, at least in part, on a refresh rate associated with the frame capture uni. Methods further include reading, using the frame display unit, the video frame from the buffer after a designated period of time defined by the offset value.

The present invention may comprise: in order to receive an analog image signal, generating a camera initialization signal including operation period information of a camera; transmitting the camera initialization signal to a plurality of analog image signal transmission apparatuses; determining whether or not each of the plurality of analog image signal transmission apparatuses is ready to transmit the analog image signal; if determining that each of the plurality of analog image signal transmission apparatuses is ready to transmit the analog image signal, simultaneously transmitting a transmission command signal to the plurality of analog image signal transmission apparatuses; and receiving a plurality of analog image signals from the plurality of analog image signal transmission apparatuses.

Systems, methods, and devices perform synchronization operations for video streams. Methods include receiving a video frame at a frame capture unit, the video frame being included in a stream of video data, buffering the video frame using a buffer coupled between the frame capture unit and a frame display unit, and determining an offset value based, at least in part, on a refresh rate associated with the frame capture uni. Methods further include reading, using the frame display unit, the video frame from the buffer after a designated period of time defined by the offset value.