Multi-broadcasting stream merging method of supporting VCR function

A multicast streaming and functional technology, applied in the field of video service system, can solve the problems of incompatibility between personalized service and server scalability, loss, etc.

Inactive Publication Date: 2005-04-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to propose a method for combining multicast streams that supp

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  • Multi-broadcasting stream merging method of supporting VCR function
  • Multi-broadcasting stream merging method of supporting VCR function
  • Multi-broadcasting stream merging method of supporting VCR function

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Embodiment Construction

[0013] Such as figure 1 As shown, the video service system consists of two parts, the client and the server, and the two parts transfer video data and control information through the network. The client cache is responsible for providing data to the player, observing its behavior, and sending requests to the server in a timely manner. The client receiver is responsible for receiving data from the network and putting it into the cache. The server-side scheduler performs stream scheduling after receiving the request, and sends the data to the client in the form of multicast stream.

[0014] The overall process of the present invention is as figure 2 shown. When a new client joins the system, the player requests data from the cache (step 11), and the cache control checks the data in the cache (step 12), and if there is corresponding data, the data is directly returned to the player for playback (step 13) If not, then send a request to the server (step 14), wait until the ser...

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Abstract

The multicasting flow merging method backing up VCR function has the server side to provide the client side with multicasting video service, and the client side to access the active buffer memory and with control and request mechanism to create condition for the flow merging in the server side. In the server side adopting the flow merging mechanism, when some new client joins the system, the broadcaster requests data to the buffer memory, the buffer memory controller checks the data inside the buffer memory, and the corresponding data, if existing, will be returned to the broadcaster for direct broadcasting; or, in case of no data, request will be sent to the server and the server returns to the multicasting flow address for the receiver to receive the flow data from the corresponding address. The present invention provides one synergistic mechanism between the client side and the server side.

Description

technical field [0001] The invention relates to a video service system, in particular to a personalized video service system which transmits data in multicast form and can support user VCR operation. Background technique [0002] The video service system using multicast technology can be widely used in network teaching, video conferencing, network classroom, video on demand and other services. Compared with the video service in the unicast mode, the video service system using the multicast technology saves the bandwidth of the server and makes it have higher performance. Compared with the traditional live video service, the method of combining multicast streams can make the video service more personalized, and can meet the different needs of customers at any time. The existing methods for merging multicast streams supporting the VCR function have insufficient functions. [0003] VCR software can download streaming files such as ASF, RM, WMA, RA,...

Claims

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Application Information

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IPC IPC(8): H04N7/00H04N7/15H04N7/173
Inventor 单炜陆桑璐陈力军陈道蓄谢立
Owner NANJING UNIV
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