Patent ID: 8738685
Filing Date: 2014-05-27
Classification: H04N

Abstract:
1. A node device for use in a distributed content storage system, the node device comprising: a storing unit that stores content catalog information wherein the content catalog information includes unique identification information of divided content data and key frame information, wherein the divided content data includes a key frame obtained by compressing an image frame and compressed differential data obtained by compressing differential information between image frames, and key frame information includes information indicative of a position from a head of the divided content data, of the key frame included in the divided content data; an instruction receiving unit that receives an instruction indicative of playing back the content data; a determining unit configured to determine the key frame information of the key frame included in the divided content data and the unique identification information of the divided content data on the basis of the content catalog information in accordance with the instruction; and a frame obtaining unit configured to obtain the key frame on the basis of the determined key frame information and the determined unique identification information, wherein the distributed content storage system stores the divided content data in a plurality of node devices comprising a peer-to-peer communication system in a distributed manner, the divided content data being obtained by dividing content data including the image frames, and the content data being constituted by the divided content data, and wherein the unique identification information is assigned to each of the divided content data and each of the node devices can obtain the divided content data on the basis of the unique identification information.