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US 9,544,658 B2Granted
Video signal transmission/reception method, display device, and decoding device
AssigneeHitachi Maxell, Ltd.
InventorsMayuko Tanaka, Nobuaki Kabuto
Life of this patent
Estimating the term…
Abstract
According to the present invention, even when the operation requested through the second transmission path (or first transmission path) cannot be performed, it is possible to perform the requested operation by using the function of the device coupled to the first transmission path (or second transmission path).
Claims8
A method for first, second, and third devices to transmit or receive a video signal, the first and second devices being coupled together through a first network, the first and third devices being coupled together through a second network which is a different network from the first network, and the second and third devices being coupled together through the second network, the method comprising:
- when the first device cannot process a video signal received from the third device through the second network,
- transmitting a limited multicast message from the first device to devices that are coupled to the first device by both the first network and the second network, via the second network to search for a device which can process the video signal which cannot be processed by the first device, the limited multicast message being addressed to only devices coupled to the first network, wherein a communication protocol of the first network is different from a communication protocol of the second network, and the limited multicast massage employs the communication protocol of the second network;
- transmitting a response message from the second device to the first device through the second network, the response message indicating that the second device can process the video signal;
- transmitting a request message from the first device to the second device to request the second device to process the video signal;
- receiving, by the second device, the video signal from the third device through the second network;
- processing, by the second device, the received video signal;
- and
- transmitting, by the second device, the processed video signal to the first device through the first network.
5 more elements
A display device for displaying video on the basis of a received video signal, comprising:
- a first transmitter/receiver configured to transmit or receive a signal through a first network;
- a second transmitter/receiver configured to transmit or receive a signal through a second network which is a different network from the first network;
- a decoder configured to decode a video signal received by the second transmitter/receiver;
- and
- a display unit configured to display video on the basis of a video signal received by the first transmitter/receiver or a video signal decoded by the decoder,
- wherein when the decoder cannot decode an encoding format of a video signal received by the second transmitter/receiver, the second transmitter/receiver transmits a limited multicast message to devices that are coupled to the first transmitter/receiver by both the first network and the second network, via the second network to search for a device which can decode the video signal, the limited multicast message being addressed to only devices coupled to the first network, and
- a communication protocol of the first network is different from a communication protocol of the second network, and the limited multicast massage employs the communication protocol of the second network.
4 more elements
A decoding device for decoding a video signal, comprising:
- a first transmitter/receiver configured to transmit or receive a signal through a first network;
- a second transmitter/receiver configured to transmit or receive a signal through a second network which is a different network from the first network;
- and
- a decoder configured to decode a video signal received by the second transmitter/receiver, wherein
- the second transmitter/receiver is further configured to:
- receive a limited multicast message which is an inquiry about a capability of the decoder, the limited multicast message being addressed to only devices coupled to the first network, and is sent from the first transmitter/receiver to devices that are coupled to the first device by both the first network and the second network, via the second network, wherein a communication protocol of the first network is different from a communication protocol of the second network, and the limited multicast massage employs the communication protocol of the second network,
- transmit information about a transmission band to expectedly be secured with a content server through the second network and information about the capability of the decoder to a source of the limited multicast message, and
- receive a video signal from the content server,
- the decoder decodes the received video signal, and
- the first transmitter/receiver transmits the decoded video signal to a device other than the content server.
7 more elements
Dependencies are inferred from the claim text.