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Self-adapting transmission method and system in ascending honeycomb video communication

A technology of video communication and transmission method, applied in the field of communication, can solve the problem of not reducing the probability of packet loss and effectively solving the problem of packet loss in cellular video communication, so as to reduce the probability of packet loss events, continuous image quality, The effect of clear image quality

Inactive Publication Date: 2008-07-16
SHANGHAI JIAO TONG UNIV
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AI Technical Summary

Problems solved by technology

For the sudden packet loss in cellular video communication, because the packet loss is caused by channel error reasons such as signal attenuation, reducing the sending bit rate cannot reduce the probability of packet loss. This method cannot effectively solve the problem in cellular video communication. packet loss problem

Method used

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  • Self-adapting transmission method and system in ascending honeycomb video communication
  • Self-adapting transmission method and system in ascending honeycomb video communication

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Embodiment Construction

[0025] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0026] This embodiment is based on the mobile video monitoring system of CDMA (code division multiple access) 2000-1X network, and this system adopts embedded digital signal processing chip TMS320DM642 as the main processing chip of video codec unit, realizes the video codec based on H.264 standard Decoding; ARM central processing chip is used to realize the transmission control unit function of the sending end / receiving end; the existing public mobile communication network CDMA2000-1X is used as a cellular wireless transmission network. This sample embodiment can be ...

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Abstract

The invention discloses a self-adaptive transmission method and a self-adaptive transmission system in the uplink cellular video communication of the wireless multimedia communication technical field. The method is that: a feedback-based channel effectively transmits bandwidth perceiving; the sending speed of a data flow is adjusted according to the perceived effective transmission bandwidth, the adjustment of the sending rate is realized by changing the packet length of the data flow; two-stage information resource rate control based on cache cleaning and rate control of an encoder is used. The device comprises a sending end, a transmission network and a receiving end, wherein the sending end comprises a video encoding unit and a transmission control unit, the receiving end comprises a transmission control unit and a video decoding unit, the sending end and the receiving end transmit messages through the transmission network. The sending rate of the invention can automatically adapt to the change of the channel bandwidth, decreases the probability of packet loss caused by the fluctuation of the wireless channel bandwidth, and realizes that the customer side can obtain the best possible playing quality under the condition of constant change of network operation conditions.

Description

technical field [0001] The present invention relates to a method and system in the technical field of communication, in particular to an adaptive transmission method and system in uplink cellular video communication. Background technique [0002] At present, the wireless cellular network (2G / 2.5G / 3G) has been adopted as a mobile communication access standard by most countries and regions in the world, and it also provides the possibility for ubiquitous mobile multimedia communication. Mobile multimedia communication based on video and audio will be the mainstream service of cellular networks in the future, and will provide people with multimedia communication services anytime and anywhere. The wireless video communication based on the cellular network, its transmission network includes the wireless channel from the transceiver terminal to the mobile base station, and the backbone network (such as the Internet) between the mobile base stations or from the base station to the ...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L29/06
Inventor 张重阳杨华成皓
Owner SHANGHAI JIAO TONG UNIV
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