# US 2014/0156739 A1 · Client device, information processing method, and information processing system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0156739 A1 - Document ID: US20140156739A1 - Status: Published application - Kind: A1 - Application number: 14/174,991 - Filed: 2014-02-07 - Published: 2014-06-05 - Earliest claimed: 2010-11-22 - Assignees: Sony Corporation - Applicants: Sony Corporation - Inventors: Shin YANAI; Tohru Kurata; Hiroki Kato; Masayuki Ebisawa; Tatsuya Koeda; Hideaki Nishino - Web page: https://patentgrep.com/patent/US20140156739A1 ## CPC - H04L 65/1094: Inter-user-equipment sessions transfer or sharing - H04L 65/1073: Registration or de-registration - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract There is provided a client device including a storage section which stores content data, a control section which acquires content identification information for identifying the content data stored in the storage section, and a transmission section which transmits, to a server device, a registration request including user identification information for identifying a user who uses the client device and the content identification information acquired by the control section, and which, when the server device holds the content data identified by the content identification information, causes the server device to hold information obtained by associating the user identification information with the content identification information as user-specific registration information. ## Claims ### Claim 1 A client device comprising: a storage section which stores content data; a control section which acquires content identification information for identifying the content data stored in the storage section; and a transmission section which transmits, to a server device, a registration request including user identification information for identifying a user who uses the client device and the content identification information acquired by the control section, and which, when the server device holds the content data identified by the content identification information, causes the server device to hold information obtained by associating the user identification information with the content identification information as user-specific registration information. ### Claim 2 (depends on 1) The client device according to claim 1, wherein, when the server device does not hold the content data identified by the content identification information, the transmission section causes the server device to be prohibited from holding the user-specific registration information. ### Claim 3 (depends on 1) The client device according to claim 1, wherein, when the server device does not hold the content data identified by the content identification information, the transmission section causes the server device to hold the user-specific registration information, and also transmits the content data stored in the storage section to the server device and causes the server device to hold the content data. ### Claim 4 (depends on 1) The client device according to claim 1, wherein the storage section further stores a playlist obtained by arranging a plurality of pieces of content identification information in reproduction order, wherein the control section acquires the playlist stored in the storage section, and wherein the transmission section further transmits the playlist to the server device, and causes the server device to hold a list, which is obtained by eliminating the content identification information that is not included in the user-specific registration information from the playlist, in association with the user identification information. ### Claim 5 (depends on 1) The client device according to claim 1, wherein the storage section further stores a playlist obtained by arranging a plurality of pieces of content identification information in reproduction order, wherein the control section acquires the playlist stored in the storage section, and wherein the transmission section further transmits the playlist to the server device, and causes the server device to hold the playlist in association with the user identification information. ### Claim 6 A client device comprising: a control section which acquires content identification information designated by a user who uses the client device as selection information; a transmission section which transmits, to a server device, a content transmission request including user identification information for identifying the user and the selection information acquired by the control section, and which, when the server device holds information obtained by associating the user identification information with the selection information as user-specific registration information, causes the server device to execute transmission of content data identified by the selection information as a response to the content transmission request; and a reception section which receives the content data transmitted from the server device. ### Claim 7 (depends on 6) The client device according to claim 6, wherein, when the selection information is not held, as the content identification information, by the server device in association with the user identification information, the transmission section causes the server device to be prohibited from transmitting the content data identified by the selection information. ### Claim 8 (depends on 6) The client device according to claim 6, further comprising a storage section which stores content data, wherein the control section acquires content identification information for identifying the content data stored in the storage section, and wherein the transmission section transmits, to the server device, a registration request including the user identification information and the content identification information acquired by the control section, and when the server device holds the content data identified by the content identification information, the transmission section causes the server device to hold information obtained by associating the user identification information with the content identification information as the user-specific registration information. ### Claim 9 (depends on 8) The client device according to claim 8, wherein the transmission section transmits, to the server device, a registration request including the user identification information and the content identification information acquired by the control section, and when the server device holds the content data identified by the content identification information, the transmission section causes the server device to continuously hold the user-specific registration information, which has already been held by the server device, and also causes the server device to add information obtained by associating the user identification information with the content identification information to the user-specific registration information. ### Claim 10 (depends on 1) The client device according to claim 1, wherein the transmission section transmits, to the server device, an information transmission request which is a request for acquiring content-related information, which is information related to content data held by the server device, wherein the client device further comprises a reception section which receives, from the server device, the content-related information as a response to the information transmission request, and wherein the control section causes a predetermined display section to display the content-related information received by the reception section from the server device. ### Claim 11 (depends on 10) The client device according to claim 10, wherein the transmission section transmits, to the server device, user identification information for identifying a user who uses the client device by including the user identification information in the information transmission request, and wherein, when, in the content-related information received by the reception section from the server device, there is included information indicating that the content identification information is not registered in the user-specific registration information in association with the user identification information included in the information transmission request, the control section causes the predetermined display section to display the content-related information, and also causes the predetermined display section to display a predetermined object for causing the user to purchase the content data identified by the content identification information, in a corresponding manner to the content-related information. ### Claim 12 (depends on 1) The client device according to claim 1, wherein the transmission section transmits, to the server device, a registration information acquisition request including user identification information for identifying a user who uses the client device, wherein the client device further comprises a reception section which receives content-related information as a response to the registration information acquisition request from the server device, the content-related information being information related to content data identified by the content identification information which is held by the server device in association with the user identification information in the user-specific registration information, and wherein the control section causes a predetermined display section to display the content-related information received by the reception section from the server device. ### Claim 13 (depends on 12) The client device according to claim 12, wherein the reception section further receives content-related information as a response to the registration information acquisition request from the server device, the content-related information being information related to content data identified by the content identification information which is not held by the server device in association with the user identification information in the user-specific registration information, and wherein the control section causes the predetermined display section to display the content-related information, and also causes the predetermined display section to display a predetermined object for causing the user to purchase the content data identified by the content identification information, in a corresponding manner to the content-related information. ### Claim 14 An information processing method, comprising the steps of: storing content data; acquiring content identification information for identifying the content data; transmitting, to a server device, a registration request including user identification information for identifying a user and the content identification information; and causing, when the server device holds the content data identified by the content identification information, the server device to hold information obtained by associating the user identification information with the content identification information as user-specific registration information. ### Claim at position 15 15-17. (canceled)