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RTP anti-packet-loss method

An anti-packet loss and data packet technology, applied in the field of computer communication, can solve problems such as the inability to ignore the impact of network packet loss, and achieve the effect of improving service quality

Inactive Publication Date: 2010-10-20
BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
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  • Description
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  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to propose a method for RTP anti-packet loss, using forward error correction (FEC), to realize RTP Receiver reconstruction data function when transmission error occurs

Method used

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Embodiment Construction

[0030] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0031] figure 1 Schematic diagram of the video surveillance system. In this embodiment, an RTP anti-packet loss method is described by taking a video surveillance system as an object. figure 1 Among them, the video monitoring system includes a central management service unit, a video data distribution / forwarding processing unit, a front-end equipment unit and a user unit. Among them, the central management service unit is the core unit of the video surveillance system, responsible for the access of monitoring equipment and clients, the signaling forwarding control processing of each unit, the reception and processing of alarm information, and the management of business support information. The video data distributio...

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Abstract

The invention discloses an RTP anti-packet-loss method in the technical field of computer communication, which is used for solving the problems that RTP lacks a retransmission mechanism and cannot ignore network packet loss. The method comprises the following steps: storing an extension head in a contribution source identifier CSRC field of a data packet head before a streaming medium sender sends streaming medium data; setting a forward error correction cycle in the extension head; adding 1 to a serial number every time after a frame is sent; every time when the length complementation result of the serial number and the forward error correction cycle is equal to the difference between the length of the forward error correction cycle and 1, sending a correction frame, and simultaneously, adding 1 to the serial number; and when the missing frame number in one forward cycle exceeds 1, adopting a feedback retransmission mechanism to request to retransmit the missing frame by a streaming medium receiving end or directly ignoring the frame which cannot be recovered, thereby preventing network congestion caused by retransmission. The invention improves a transmission mechanism of the RTP so that the RTP has the retransmission function, and improves the service quality for the RTP to transmit the streaming medium data.

Description

technical field [0001] The invention belongs to the technical field of computer communication, and in particular relates to an RTP anti-packet loss method. Background technique [0002] Video data is carried on the IP network and transmitted in the form of video data packets, which inevitably encounters the problem of network packet loss. Packet loss will cause problems such as video image mosaic, local image deformation, frequent screen refresh or flicker, video and audio out of sync, frame rate drop, and image stillness. These problems will greatly affect the user's application experience. If the network packet loss rate is too large or too frequent, it will also cause excessive delay in the transmission of video data, and even cause communication interruption. [0003] According to the characteristics of streaming media data, because a small amount of errors and losses in audio and video data have little impact on the final playback quality, in order to avoid the delay c...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/18H04L29/06
Inventor 姜圳
Owner BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
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