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D2D network multimedia stream code rate adjusting method and D2D network multimedia stream real-time transmission system

A multimedia stream and adjustment method technology, applied in image communication, selective content distribution, electrical components, etc., can solve problems such as waste of computing time, inapplicability, and difficulty in meeting the real-time requirements of users for transmission information, and achieve saving resources, improve user experience, improve spectrum utilization and expand system capacity

Active Publication Date: 2021-01-01
NORTHEASTERN UNIV
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AI Technical Summary

Problems solved by technology

However, due to the high computational complexity of DASH technology, a lot of computing time will be wasted during operation, which is not applicable in D2D networks, and it is difficult to meet the real-time requirements of users for transmitting information.

Method used

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  • D2D network multimedia stream code rate adjusting method and D2D network multimedia stream real-time transmission system
  • D2D network multimedia stream code rate adjusting method and D2D network multimedia stream real-time transmission system
  • D2D network multimedia stream code rate adjusting method and D2D network multimedia stream real-time transmission system

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Embodiment Construction

[0040] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] Such as figure 1 As shown, a D2D communication network is established within a certain range, and then file transmission and video stream data encoding and decoding are performed. Using the Wi-Fi Direct function of Android smartphones to build a D2D network with multiple devices, data transmission and processing are both It is carried out in the D2D network, and adopts the adaptive multimedia stream code rate adjustment method of the present invention to sense the network status of the receiving end and request video content with different code rates accordingly, removing the role of the base station in the data transmission process, such as Figure 4 (a) and Fi...

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Abstract

The invention discloses a D2D network multimedia stream code rate adjusting method and a D2D network multimedia stream real-time transmission system, and belongs to the technical field of wireless network communication. The system is realized on an Android platform, establishes a D2D communication group by fully utilizing a WiFi Direct technology and other multimedia functions on a mobile phone, and achieves the functions of D2D network establishment, file transmission and video stream data encoding and decoding within a certain range. The invention further provides an adaptive multimedia stream code rate adjusting method. The method can sense the network condition of a receiving end, requests video content with different code rates according to the network condition, and achieves real-time transmission of multimedia streams. Resource sharing service is transferred from a cellular network facility to device-to-device, the spectrum utilization rate is improved, and the system capacity is expanded.

Description

technical field [0001] The present invention relates to the technical field of wireless network communication, in particular to a D2D network multimedia stream code rate adjustment method and a multimedia stream real-time transmission system. Background technique [0002] In terms of applying D2D communication technology to mobile streaming media services, a relatively mature MicroCast service system has been proposed abroad. However, each device of MicroCast downloads video blocks of different time periods from the server, and then shares them with other users through the D2D link. Since the data blocks are not obtained sequentially according to the playback time, it does not support real-time playback. The prior art also proposes an HTTP-based dynamic adaptive streaming technology (Dynamic Adaptive Streaming over HTTP, DASH), which controls video streams according to network conditions. Due to the limitations of traditional TCP / IP network support for video transmission, e...

Claims

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Application Information

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IPC IPC(8): H04N21/238H04W4/70
CPCH04N21/23805H04W4/70
Inventor 李婕杨志萍王兴伟李福亮栗腾飞王湛元
Owner NORTHEASTERN UNIV
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