Patent ID: 7256837

Claim:
A baseband video transmission system for transmission of a video signal including component video signals, said system comprising: a transmitting device for multiplexing a horizontal synchronizing signal and a vertical synchronizing signal with at least one component video signal of the video signal, multiplexing a data signal with at least one other component video signal of the video signal during at least one blanking period of the component video signals of the video signal, multiplexing each component video signal, including the at least one component video signal having the horizontal synchronizing signal and the vertical synchronizing signal multiplexed therewith and the at least one other component video signal having the data signal multiplexed therewith, with each other to generate a DVI video signal, and outputting a DVI signal including the DVI video signal and a system clock of the component video signals; and a receiving device for receiving the DVI signal, extracting the horizontal synchronizing signal and the vertical synchronizing signal from the at least one composite video signal having the horizontal synchronizing signal and the vertical synchronizing signal multiplexed therewith included in the received DVI signal, extracting the data signal from the at least one other component video signal having the data signal multiplexed therewith included in the received DVI signal, extracting each component video signal of the video signal from the received DVI signal, using the extracted horizontal synchronizing signal, the extracted vertical synchronizing signal and the received system clock of the component video signals to synchronize a character image signal from the extracted data signal with the video signal, and reproducing the video signal and the character image signal, wherein the data signal represents data of a type selected from the group consisting of closed-captions, teletext, and a control signal for controlling a host.