Patent ID: 8005356

Claim:
The video transmission system of a ring network comprising: a ring redundant network, which is for carrying out optical wavelength multiplexing of at least one video signal, utilizable in the system, and transmission of a multiplexed signal; an acquisition unit for the multiplexed signal, which acquires the multiplexed signal in said ring redundant network; an output unit for a first signal, which is capable of outputting any first video signal, demultiplexed from the acquired multiplexed signal, to external from said ring redundant network; an input receiving unit for a second signal, which receives an input of any second video signal, external from said ring redundant network, to be included in the multiplexed signal in said ring redundant network; an output unit for the multiplexed signal, which is capable of multiplexing of said second video signal, which has been inputted, and of outputting the multiplexed signal to said ring redundant network, and a plurality of optical wavelength multiplexing apparatuses, and a plurality of video transmission apparatuses, adjacent to the respective optical wavelength multiplexing apparatuses, wherein the optical wavelength multiplexing apparatus comprises the acquisition unit for a multiplexed signal, the output unit for the first signal, the input receiving unit for the second signal, and the output unit for a multiplexed signal, the acquisition unit for a multiplexed signal comprises an acquisition means for a multiplexed signal, which acquires a multiplexed signal, outputted from another optical wavelength multiplexing apparatus, the output unit for the first signal comprises an output means for the first signal, which is capable of outputting said first video signal to the adjacent video transmission apparatus, which is exterior of the ring redundant network, the input receiving unit for the second signal comprises an input receiving means for the second signal, which receives an input of said second video signal from the adjacent video transmission apparatus, which is external from the ring redundant network, and the output unit for the multiplexed signal comprises an output means for the multiplexed signal, which is capable of multiplexing said second video signal, and of outputting the multiplexed signal to another optical wavelength multiplexing apparatus, different from the optical wavelength multiplexing apparatus, which has acquired said multiplexed signal.