Streaming media wireless adaptive transmission method based on TCP (Transmission Control Protocol)

An adaptive transmission and streaming media technology, applied in the transmission system, electrical components, etc., can solve the problems of reduced network utilization and affecting the reception effect, and achieve the effects of reducing delay, ensuring transmission reliability, and data reliability

Inactive Publication Date: 2014-11-05
浙江奇汇电子提花机有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Blindly entering congestion control will reduce network utilization and affect reception

Method used

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  • Streaming media wireless adaptive transmission method based on TCP (Transmission Control Protocol)
  • Streaming media wireless adaptive transmission method based on TCP (Transmission Control Protocol)
  • Streaming media wireless adaptive transmission method based on TCP (Transmission Control Protocol)

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Embodiment Construction

[0022] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Such as figure 1 with figure 2 Shown, a kind of streaming media wireless adaptive transmission method based on TCP protocol, comprises the steps:

[0024] (1) With the frame rate initial value v 0 = 5 frames per second for audio and video encoding; data segmentation is performed on the I frame, P frame and B frame in the encoded audio and video stream to obtain multiple data fragments; each data fragment takes 600 bytes as a unit , the last data fragment of an I frame, P frame, B frame or audio stream can be a data fragment of less than 600 bytes.

[0025] The I frame represents the key frame in the video stream, the P frame represents the difference between the current frame and the previous frame, and the B frame represents the difference bet...

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PUM

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Abstract

The invention relates to the technical field of audio and video data transmission, and discloses a streaming media wireless adaptive transmission method based on a TCP (Transmission Control Protocol). According to the method, audio and video data is encapsulated through a fixed-length packet header by adopting the TCP according to the characteristic of reliable data transmission of the TCP; and meanwhile, double buffer areas are set to store and transmit audio and video data packets respectively, and packet loss and frame rate adjustment are performed according to the real-time state of a network to adapt to the bandwidth change of a wireless channel, so that a network congestion state is reduced. By using the principle, the original transmission reliability of the TCP is ensured, delay in video transmission is reduced, and high-quality transmission of the audio and video data based on a wireless network is well realized.

Description

technical field [0001] The invention belongs to the technical field of audio and video data transmission, and in particular relates to a wireless adaptive transmission method for streaming media based on the TCP protocol. Background technique [0002] In the current various emergency communication system solutions, the audio and video data transmission between the emergency audio and video communication terminal and the command center is mainly implemented based on wireless networks such as 3G. In this application, the complexity of the network environment is far more than that of traditional Wired networks, such as wireless networks, have low bandwidth and high bit error characteristics, which make the traditional audio and video communication terminals based on wired network design unsatisfactory, such as delay, jitter, blurred screen, and even audio and video transmission interruption. etc., which is unacceptable in emergency telecommunications. Therefore, how to transmi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L29/08
Inventor 赵益民
Owner 浙江奇汇电子提花机有限公司
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