Content transmission device and content playback device

Abstract

A content transmission unit ( 22 ) is provided that performs chunk transfer of a segment to a client ( 2 ) in subsegment unit, the subsegment being formed by dividing the segment into a plurality of pieces after receiving a request requiring transmission of the segment from the client ( 2 ).

1 . (canceled) 
     
     
         2 . A content transmission device that transmits content which is constituted by a plurality of segments and in which each of the segments is divided into a plurality of subsegments being capable of random access to a content playback device, the content transmission device comprising:
 transmission means for transmitting a response to the content playback device in response to a request after receiving the request from the content playback device,   wherein the transmission means transfers the each of the segments to the content playback device in subsegment unit in a case where the request requires transmission of the segment.   
     
     
         3 . The content transmission device according to  claim 2 , wherein
 time information and/or byte size of the subsegments is described in a header of the content.   
     
     
         4 . The content transmission device according to  claim 2 ,
 wherein the transmission means transfers the each of the segments using chunked transfer of HTTP protocol.   
     
     
         5 . A content playback device that acquires content which is constituted by a plurality of segments and in which each of the segments is divided into a plurality of subsegments being capable of random access from a content transmission device and performs playback of the content, the content playback device comprising:
 acquisition means for transmitting a request for requiring transmission of the segment to the content transmission device, wherein the acquisition means acquires the each of the segments that is transferred from the content transmission device in subsegment unit in response to the request.   
     
     
         6 . The content playback device according to  claim 5 , wherein time information and/or byte size of the subsegments is described in a header of the content. 
     
     
         7 . The content playback device according to  claim 5 , wherein the acquisition means acquires the each of the segments by chunked transfer of HTTP protocol.