Multimedia data stream transmission method united with data differential coding and packet forward error correction coding
A technology of forward error correction coding and multimedia data, which is applied in the field of multimedia data stream transmission, can solve problems such as multiple intranets, strict real-time video stream delay requirements, UDP protocol packet loss, etc., to improve effectiveness and reliability Effect
Inactive Publication Date: 2012-09-12
HARBIN INST OF TECH
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Problems solved by technology
However, the transmission of real-time video streams is very demanding on delay
Moreover, the TCP retransmission method is not suitable for multicast applications involving large user groups.
Many IP TV service providers prefer to use the way of managing IP networks to explain the problem of packet loss, which can reduce the packet loss rate of streaming media transmission, but cannot guarantee that the end-to-end video streaming quality can meet the growing transmission demand
In addition, the domestic network is unstable and there are many intranets. Although the characteristics of UDP allow it to penetrate the intranet, more end users can be used and the effect is better, but the UDP protocol has serious packet loss problems.
Therefore, how to satisfy the essential problems of effectiveness and reliability at the same time is still a bottleneck that plagues the current technological development.
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specific Embodiment approach 1
[0020] Specific implementation mode 1. Combination figure 1 Describe this specific implementation mode, the multimedia data stream transmission method of joint data distinguishable coding and packet forward error correction coding,
[0021] The multimedia data stream transmission process of the multimedia server is as follows:
[0022] Step 1, using M Packet forward error correction encoders to carry out Packet coding on the information frames sent by M digital audio / video streaming media respectively, to obtain M coded data;
[0023] Step 2, using M differentiable encoders to perform distinguishable encoding on the M coded data obtained in step 1, respectively, to obtain M differently coded data;
[0024] Step 3, sending the M-path distinguishable coded data obtained in step 2 to the Packet-based selection delivery network, and the M-way distinguishable-coded data are mixed to form a mixed signal in the Packet-based selective delivery network; M is positive integer;
[002...
specific Embodiment approach 2
[0049] Embodiment 2. The difference between this embodiment and the multimedia data stream transmission method described in Embodiment 1 is that M=2.
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A multimedia data stream transmission method united with data differential coding and packet forward error correction coding relates to a multimedia data stream transmission method, and can enhance the effectiveness and reliability of multimedia data stream transmission. The method includes: multimedia data stream transmission process of a multimedia server: after undergoing Packet coding and differential coding, the information frames sent by M digital audio / video stream media are transmitted to a Packet-based selective delivery network; and multimedia data stream transmission process of each client: the client carries out differential decoding and Packet forward error correction decoding on the simultaneously received M channels of differentially coded data and then merges the data, and therefore the reception of multimedia data streams by the client is fulfilled. The multimedia data stream transmission method united with data differential coding and packet forward error correction coding is applicable to multimedia data stream transmission.
Description
technical field [0001] The invention relates to a multimedia data stream transmission method. Background technique [0002] The salient features of the current popular peer-to-peer (P2P) technology are: making full use of the client's uplink bandwidth, occupying uplink bandwidth while downlink, providing resources for other users, and realizing network acceleration and expansion. Using the P2P method can achieve the purpose of downloading acceleration and expanding the user base. Compared with the P2P downloading technology, the P2P streaming media technology is more difficult. Because the former download is a random download, it can be composed of files in the end, but the latter requires order, because the video and audio data cannot be reversed. in order. [0003] P2P streaming media technology has the difference between Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). TCP is only suitable for small areas with short delays. However, the transmissi...
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IPC IPC(8): H04L29/06H04L1/00
Inventor 于启月吴萌孟维晓林舒
Owner HARBIN INST OF TECH