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    • 2. 发明申请
    • A MEDIA SERVER AND METHOD OF OPERATION THEREFOR
    • 媒体服务器及其操作方法
    • WO2007116334A2
    • 2007-10-18
    • PCT/IB2007/051097
    • 2007-03-28
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.THIJSSEN, Paulus, T., A.
    • THIJSSEN, Paulus, T., A.
    • H04N7/24H04N5/00G11B27/10
    • H04N21/23106G11B20/10527G11B27/10G11B2020/10666G11B2020/10759H04N5/76H04N5/765H04N5/775H04N5/781H04N21/2381H04N21/4331H04N21/4333H04N21/4363H04N21/4381
    • A media server (201) comprises a circular buffer (303) which buffers a received media stream to provide a time shifting function. A file indication processor (305) generates a first linear file indication for the circular buffer (303) which are transmitted to media clients (203). The linear file indication has a first file timing indication. A receiver (313) can receive a media request message from at least one media client (203) comprising a request for media indicated by the first linear file indication and including a playback start indication relative to the first file timing indication. A playback controller (315) determines a playback point for the circular buffer in response to the playback start indication and a media transmitter (317) transmits media from the first circular buffer (303) to the at least one media client (203) in response to the playback point. If the request is outside the circular buffer (303) a predetermined stream indicating that the requested media is unavailable is transmitted.
    • 媒体服务器(201)包括缓冲接收的媒体流以提供时移功能的循环缓冲器(303)。 文件指示处理器(305)产生发送到媒体客户端(203)的循环缓冲器(303)的第一线性文件指示。 线性文件指示具有第一文件计时指示。 接收器(313)可以从至少一个媒体客户端(203)接收媒体请求消息,该媒体请求消息包括由第一线性文件指示所指示的媒体请求并且包括关于第一文件定时指示的回放开始指示。 回放控制器(315)响应于回放开始指示来确定循环缓冲器的回放点,并且媒体发送器(317)响应于该响应将媒体从第一循环缓冲器(303)发送到至少一个媒体客户端(203) 到播放点。 如果请求在循环缓冲器(303)之外,则发送指示所请求的媒体不可用的预定流。