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US 7,256,837 B2Granted
Baseband video transmission system
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYutaka Nio, Taro Funamoto
Life of this patent
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Abstract
In a baseband video transmission system for transmission of a video signal at a baseband based on the DVI standard, a transmitting device multiplexes a data signal representing data other than video during at least one blanking period of component video signals of the video signal to generate a DVI signal. A receiving device receives the DVI signal, and extracts the data signal from the received DVI signal.
Claims11
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.
11 more elements
Dependencies are inferred from the claim text.