# US 11,122,304 B2 · Source device, content providing method using the source device, sink device and controlling method of the sink device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,304 B2 - Document ID: US11122304B2 - Status: Granted - Kind: B2 - Application number: 15/931,801 - Filed: 2020-05-14 - Published: 2020-08-27 - Granted: 2021-09-14 - Earliest claimed: 2013-01-28 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Sung-bo Oh - Web page: https://patentgrep.com/patent/US11122304B2 ## CPC - H04N 21/2347: involving video stream encryption - G06F 21/10: Protecting distributed programs or content, e.g. vending or licensing of copyrighted material (protection in video systems or pay television H04N7/16) {; Digital rights management [DRM]} - G09G 5/006: {Details of the interface to the display terminal (specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04)} - H04L 63/0428: {wherein the data content is protected, e.g. by encrypting or encapsulating the payload} - H04N 21/43622: {Interfacing an external recording device} - H04N 21/4367: Establishing a secure communication between the client and a peripheral device or smart card - H04N 21/440263: {by altering the spatial resolution, e.g. for displaying on a connected PDA} - H04N 21/4408: involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network - G09G 2340/0407: Resolution change, inclusive of the use of different resolutions for different screen areas - G09G 2358/00: Arrangements for display data security - G09G 2370/047: using display data channel standard [DDC] communication - G09G 2370/12: Use of DVI or HDMI protocol in interfaces along the display data pipeline - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A source device for transmitting content to a sink device is provided. The source device may include an interface configured to perform high-bandwidth digital content protection (HDCP) authentication with the sink device, and a controller configured to determine an HDCP version supported by the sink device, convert the content so as to be encrypted in the HDCP version supported by the sink device in response to a determination that another HDCP version applied to the content is not supported by the sink device, encrypt the converted content in the HDCP version supported by the sink device, and control the interface to transmit the content to the sink device. ## Claims ### Claim 1 An electronic device for transmitting content to a display device, the electronic device comprising: an interface; and a controller configured to: identify a high-bandwidth digital content protection (HDCP) version supported by the display device, based on identifying that the HDCP version supported by the display device is not a first HDCP version, downscale a content, encrypt the downscaled content based on a second HDCP version, and transmit the encrypted content to the display device via the interface. ### Claim 2 (depends on 1) The electronic device of claim 1, wherein the first HDCP version is more recent than the second HDCP version. ### Claim 3 (depends on 1) The electronic device of claim 1, wherein the controller is configured to receive information from the display device via the interface, and identify the HDCP version supported by the display device based on the information, and wherein the information is in an extended display identification data (EDID) format. ### Claim 4 (depends on 1) The electronic device of claim 1, wherein the controller is configured to, based on the content encrypted based on the second HDCP version being transmitted to the display device, transmit, to the display device, a message indicating that the content is downscaled such that the display device outputs the message. ### Claim 5 (depends on 1) The electronic device of claim 1, wherein the content comprises at least one of image data or audio data. ### Claim 6 A method of transmitting content from an electronic device to a display device, the method comprising: identifying a high-bandwidth digital content protection (HDCP) version supported by the display device; based on identifying that the HDCP version supported by the display device is not a first HDCP version, downscaling a content; encrypting the downscaled content based on a second HDCP version; and transmitting the encrypted content to the display device. ### Claim 7 (depends on 6) The method of claim 6, wherein the first HDCP version is more recent than the second HDCP version. ### Claim 8 (depends on 6) The method of claim 6, wherein the identifying identifies the HDCP version supported by the display device based on information received from the display device, and wherein the information is in an extended display identification data (EDID) format. ### Claim 9 (depends on 6) The method of claim 6, further comprising: based on the content encrypted based on the second HDCP version being transmitted to the display device, outputting, on the display device, a message indicating that the content is downscaled. ### Claim 10 (depends on 6) The method of claim 6, wherein the content comprises at least one of image data or audio data. ### Claim 11 A system for processing digital content, the system comprising: a display device comprising at least one processor configured to: receive a content, and process and display the content; and an electronic device comprising at least one processor configured to: identify a high-bandwidth digital content protection (HDCP) version supported by the display device, based on identifying that the HDCP version supported by the display device is not a first HDCP version, downscale a content, encrypt the downscaled content based on a second HDCP version, and transmit the encrypted content to the display device.