Transmission processing method for MPEG conveying stream in video-on-demand service

Abstract

The invention discloses a transport processing method of MPEG transport stream TS in a request service, which is applicable to a stream server. The method comprises that: A. analyzing and inquiring whether key frame data is included in a coded TS packet or not; B. combining the TS packets into loading data of a real-time transport protocol RTP packet which is packed through filling with RTP headers comprising an extension header with indication information which is used to indicate that whether the key frame data is included in the RTP packet; C. storing the RTP packet; D. searching a RTP packet required by a random access after receiving a random access command, and determining whether to send the packet or not according to the indication of the extension head. The invention can avoid using a complicated search algorithm to determine whether a media packet is a random access point or not during each random access, thereby reducing consumption for system resources, improving the efficiency of the random access, and reducing the cost.

Description

technical field [0001] The invention relates to the technical field of multimedia communication, in particular to a transmission processing method of a moving picture expert group format (MPEG) transport stream (TS) in an on-demand service. Background technique [0002] MPEG TS disclosed in the 13818-1 standard of the International Organization for Standardization (ISO) and the H.222 standard of the International Telecommunication Union (ITU) is a widely used system layer multiplexing protocol, and MPEG1 / 2 / 4 video, H264 video, MPEG1 / 2 / 4 audio and other mainstream audio and video encoding formats are currently widely used in the field of broadcasting and television. With the development of multimedia communication applications such as IPTV, TS streams have also been widely used in the field of streaming media and video surveillance based on IP networks. (i.e. TS over RTP) to transmit video data. Currently, the RFC2250 document of the Internet Engineering Task Force (IETF, ...

AI Technical Summary

Problems solved by technology

[0007] 1. For each random access request in on-demand broadcasting, the streaming media server first needs to convert the standard format file into TS packets. The conversion process is very resource-intensive, and the technical specifications disclosed in the current RFC2250 file are not carried in the RTP Any indication information about I-frame data, so the prior art needs to use the I-frame search algorithm to find whether each TS packet contains I-frame data when reading TS packets, and for some encoding algorithms, the algorithm for searching I-frames It consumes a lot of system resources. For popular programs, there are often multiple on-demand sessions, which will waste a lot of system resources, resulting in high cost of the streaming server.

At the same time, consuming so many system resources in real-time on-demand will also affect the real-time performance of media data transmission

[0008] 2. For the I-frame search algorithm of various encoding formats, professional codec knowledge is required, and the general streaming servers on the edge nodes usually do not include this part of the function, which requires the transformation of these general streaming servers, thus improving the overall CDN the cost of

[0009] 3. For the on-demand request of encrypted TS programs, it is necessary to search for the nearest entitlement control information (ECM) package and send it before sending the I frame data, otherwise the terminal will not be able to play the TS package normally

However, the algorithm for finding ECM packets also consumes system resources very much, resulting in high cost of the streaming server and affecting the real-time performance of on-demand

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