Reception device, method for controlling reception device, and transmission/reception system
View Patent ↗The present technology is to enable a transmitter device to read appropriate device information (EDID) from a receiver device with a reduced burden on the user. A memory unit that stores first device information and second device information, and a communication unit that communicates with an external device are included. The control unit determines to cause the external device to read the second device information, on the basis of reception of a rewrite signal for the first device information from the external device. It is possible to cause the external device (a transmitter device) to read appropriate device information (EDID) from a receiver device (a reception device) with a reduced burden on the user, and thus, user-friendliness can be increased.
1. A reception device comprising:
memory configured to store first device information and second device information;
communication circuitry configured to communicate with an external device; and
control circuitry configured to determine to cause the external device to read the second device information, on the basis of reception of a rewrite signal for the first device information from the external device,
wherein the memory is further configured to store third device information, and, when the rewrite signal is not received, the control circuitry determines to cause the external device to read the third device information, and
wherein the second device information is information compliant with version 2.1 of high-definition multimedia interface (HDMI), and the third device information is information compliant with version 2.0 of HDMI.
2. The reception device according to claim 1 , wherein
each of the second device information and the third device information is extended display identification data (EDID) including an HDMI forum vendor specific data block (HF-VSDB) that is information regarding a function supported by a device.
3. The reception device according to claim 1 , wherein
the second device information is 512-byte EDID obtained by combining EDID for 4K high frame rate (HFR) and EDID for 8K.
4. The reception device according to claim 1 , wherein
the first device information is information included in a status and control data channel structure (SCDCS).
5. The reception device according to claim 4 , wherein
the first device information is FRL_Rate, which is information regarding a link rate selected by the external device.
6. A reception device comprising:
memory configured to store first device information and second device information;
communication circuitry configured to communicate with an external device; and
control circuitry configured to determine to cause the external device to read the second device information, on the basis of reception of a rewrite signal for the first device information from the external device,
wherein the memory is further configured to store third device information, and, when the rewrite signal is not received, the control circuitry determines to cause the external device to read the third device information, and
wherein the memory is further configured to store fourth device information, and, when the external device is compatible with neither the second device information nor the third device information, the control circuitry determines to cause the external device to read the fourth device information.
7. The reception device according to claim 6 , wherein,
when a predetermined signal is not received from the external device, the control circuitry determines that the external device is compatible with neither the second device information nor the third device information.
8. The reception device according to claim 7 , wherein
the predetermined signal is AKE_Init, which is a start signal for an authentication process with the external device.
9. The reception device according to claim 6 , wherein
the fourth device information is information compliant with version 1.4 or older of high-definition multimedia interface (HDMI).
10. The reception device according to claim 9 , wherein
the fourth device information is extended display identification data (EDID) including a vendor specific data block (VSDB) that is information regarding a function supported by a device.
11. The reception device according to claim 6 , wherein
the first device information is information included in a status and control data channel structure (SCDCS).
12. The reception device according to claim 11 , wherein
the first device information is FRL_Rate, which is information regarding a link rate selected by the external device.
13. The reception device according to claim 6 , wherein
the communication circuitry communicates with the external device through a digital interface cable.
14. The reception device according to claim 13 , wherein
the digital interface cable is a high-definition multimedia interface (HDMI) cable.
15. A reception device comprising:
memory configured to store first device information and second device information;
communication circuitry configured to communicate with an external device; and
control circuitry configured to determine to cause the external device to read the second device information, on the basis of reception of a rewrite signal for the first device information from the external device,
wherein the rewrite signal is determined depending on the second device information, and
wherein the rewrite signal is information corresponding to Max_FRL_Rate, which is information regarding a link rate supported by a device, Max_FRL_Rate being written in the second device information.
16. The reception device according to claim 15 , wherein
the first device information is information included in a status and control data channel structure (SCDCS).
17. The reception device according to claim 16 , wherein
the first device information is FRL_Rate, which is information regarding a link rate selected by the external device.
18. A reception device comprising:
memory configured to store first device information and second device information;
communication circuitry configured to communicate with an external device; and
control circuitry configured to determine to cause the external device to read the second device information, on the basis of reception of a rewrite signal for the first device information from the external device,
wherein the rewrite signal is transmitted in accordance with a value of FLT_ready, which is information indicating a preparation status of a link training process, FLT_ready being written in the first device information.
19. The reception device according to claim 18 , wherein
the first device information is information included in a status and control data channel structure (SCDCS).
20. The reception device according to claim 19 , wherein
the first device information is FRL_Rate, which is information regarding a link rate selected by the external device.