公开(公告)号：KR1020130017404A

公开(公告)日：2013-02-20

申请号：KR1020110079798

申请日：2011-08-10

Applicant: 경희대학교 산학협력단

Inventor： 서덕영 ,  고정곤 ,  박광훈 ,  김규헌

IPC: H04N5/50

CPC classification number: H04N21/4384

Abstract: PURPOSE: A method for reducing a channel change delay using a hybrid multimedia service and a device thereof are provided to reduce the channel change delay through a unicast preview channel in an open IP multicast broadcasting service. CONSTITUTION: When a user1 requests a channel change at the time(tc), a preview server provides multimedia having lower quality than the image quality of a main server to the user1 during buffering for providing a service of another channel. The user1 receives the service during the buffering. Therefore, the minimum quality of the multimedia is guaranteed for a delay channel change time. [Reference numerals] (AA) Broadcast; (BB) Main server; (CC) Channel change request(tc); (DD) User 3; (EE) User 2; (FF) Receiving a multimedia service of a preview server for a buffering time of the main server; (GG) User 1; (HH) Providing a preview service; (II) Unicast; (JJ) Preview server

Abstract translation: 目的：提供一种使用混合多媒体业务减少信道改变延迟的方法及其装置，以通过开放IP组播广播业务中的单播预测信道来减少信道改变延迟。 规定：当用户1在时间（tc）请求频道更改时，预览服务器在缓冲期间向用户1提供比主服务器的图像质量低的质量的多媒体，以提供另一频道的服务。 user1在缓冲期间接收服务。 因此，延迟通道更改时间保证多媒体的最低质量。 （附图标记）（AA）广播; （BB）主服务器; （CC）频道更改请求（tc）; （DD）用户3; （EE）用户2; （FF）接收主服务器的缓冲时间的预览服务器的多媒体服务; （GG）用户1; （HH）提供预览服务; （二）单播; （JJ）预览服务器