Transmission system and relay device
First Claim
1. A transmission system for transmitting a video signal from a source device to a sink device via a relay device,wherein the sink device supplies a power to the relay device on the basis of a request from the relay device, andwherein each of the source device and the relay device has an acquirer for acquiring physical address information of the sink device provided from the sink device and an input terminal number thereof and a communication unit for transmitting or receiving messages to or from another device, a transmission message in the messages includes information about whether a transmission originator is the source device or the relay device, the transmission message of the relay device in the messages includes information about a power required by the relay device, the sink device starts supply of powers required by the source device and the relay device on the basis of the message received by the sink device and transmits a message including information about the power supply.
5 Assignments
0 Petitions
Accused Products
Abstract
Provided is a system for supplying a power from a sink device to a source device. Not only the source device but also a cable or a repeater device to be connected thereto has compatibility in power supply. A physical address obtained from information of an EDID memory forms a base of CEC message exchange, but a physical address of the cable or repeater device is overlapped with the source device or unknown. The cable or a repeater device uses changes the type of a message while using the same physical address as the source device or use such a message having the physical address information of the source device is described in a parameter of the message using the unknown physical address. The message having a supply or reception current for each device described therein is exchanged with the sink device or the source device to adjust current reception.
8 Citations
4 Claims
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1. A transmission system for transmitting a video signal from a source device to a sink device via a relay device,
wherein the sink device supplies a power to the relay device on the basis of a request from the relay device, and wherein each of the source device and the relay device has an acquirer for acquiring physical address information of the sink device provided from the sink device and an input terminal number thereof and a communication unit for transmitting or receiving messages to or from another device, a transmission message in the messages includes information about whether a transmission originator is the source device or the relay device, the transmission message of the relay device in the messages includes information about a power required by the relay device, the sink device starts supply of powers required by the source device and the relay device on the basis of the message received by the sink device and transmits a message including information about the power supply.
Specification