QoE-based cross-layer optimal video transmission method and system under MIMO-OFDM (Multi-Input Multi-Output-Orthogonal Frequency Division Multiplexing) system

A MIMO-OFDM, cross-layer optimization technology, applied in the field of wireless video transmission optimization, can solve the problem that the decoding end cannot perform correct decoding

Inactive Publication Date: 2014-03-26
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

When the video packet is lost or the transmission delay is greater than the maximum delay limit, the decoder cannot decode correctly

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  • QoE-based cross-layer optimal video transmission method and system under MIMO-OFDM (Multi-Input Multi-Output-Orthogonal Frequency Division Multiplexing) system
  • QoE-based cross-layer optimal video transmission method and system under MIMO-OFDM (Multi-Input Multi-Output-Orthogonal Frequency Division Multiplexing) system
  • QoE-based cross-layer optimal video transmission method and system under MIMO-OFDM (Multi-Input Multi-Output-Orthogonal Frequency Division Multiplexing) system

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Embodiment Construction

[0081] The technical solution of the present invention will be explained in detail below in conjunction with the accompanying drawings.

[0082] In order to achieve this purpose, the present invention proposes a cross-layer optimized video transmission method based on a QoE prediction model under a MIMO-OFDM system. The video transmission method preprocesses the video sequence to be transmitted before each video transmission, until Only the optimal video encoding parameters and transmission parameters are selected from the predetermined set including video encoding parameters and transmission parameters before finally sending the desired video sequence to the client. The method as figure 2 As shown, it specifically includes the following steps:

[0083] Step 101) Set an initial parameter set at the video sequence sending end according to optimization needs, the parameter set includes several two-dimensional elements, and the two-dimensional elements are: video encoding param...

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Abstract

The invention discloses cross-layer optimal video transmission method and system under an MIMO-OFDM (Multi-Input Multi-Output-Orthogonal Frequency Division Multiplexing) system. The method adopts a strategy of predicting a terminal QoE as an optimization target. The method comprises the following steps: 101) structuring a user experience quality prediction model of obtaining a user expect mean opinion value according to the video content type, frame rate, video transmission bit rate and packet loss probability; 102) obtaining each concrete parameter value in the user experience quality prediction model and obtaining the maximal value of a video packet transmission delay; 103) obtaining a parameter value corresponding to the maximal value of the user expect mean opinion score under the maximal transmission delay condition as an optimal parameter value by adopting a traversal algorithm, wherein the optimal parameter value comprises a video encoding parameter value and a modulation encoding mode parameter value, and finally, respectively encoding and transmitting the video correspondingly to the video encoding parameter of an application layer and the modulation encoding mode of a physical layer.

Description

technical field [0001] The present invention relates to wireless video transmission optimization, in particular, the present invention relates to a QoE-based cross-layer optimization method and system for video transmission under MIMO-OFDM system. Background technique [0002] With the rapid development of communication technology, wireless communication systems have made great progress in network capacity and reliability. The combination of Multiple-Input Multiple-Output (MIMO) technology and Orthogonal Frequency Division Multiplexing (OFDM) technology enables wireless communication systems to more effectively support high-rate data transmission and suppress Inter-Symbol Interference (ISI). With the support of MIMO-OFDM technology, the application range of wireless multimedia services is getting wider and wider, and many end users have higher and higher requirements for the quality of multimedia they receive. How to enable end users to obtain satisfactory multimedia servic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/238H04N21/2662H04N7/24
Inventor 吕国丰胡亚辉慈松唐晖
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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