SVC-based real-time streaming media recombination algorithm under multi-path parallel transmission

Abstract

The invention discloses an SVC-based real-time streaming media recombination algorithm under multi-path parallel transmission. A video file is coded with SVC, and is partitioned into a basic layer file and an enhanced layer file, and the basic layer file of a highest importance level can be transmitted via a 3G network with high network security while the enhanced layer file is transmitted via a WLAN (Wireless Local Area Network) of high rate, so that the watching requirement of high-definition real-time videos can be met; however, such a high transmission rate is unavailable by means of a single 3G network. Meanwhile, when a user moves out of the coverage of the WLAN network, a terminal can be enabled to continuously download basic layer files since the 3G network has high mobility, thus videos can still be watched via the terminal according to the elastic performance of SVC coding and decoding even though data of an enhanced layer cannot reach. When the user returns back to the coverage of WLAN, the enhanced layer files can be downloaded continually, and high-definition image quality can be restored after two paths of received files are recombined by the terminal via the SVC real-time recombination algorithm.

Description

Technical field [0001] The present invention relates to the field of H.264 SVC encoding and decoding and multi-path parallel transmission under heterogeneous networks, in particular to a real-time stream media recombination algorithm based on SVC under multi-path parallel transmission. Background technique [0002] The future communication network will be a heterogeneous network that contains multiple different access technologies. Due to the different user terminal equipment in the heterogeneous network and the different link bandwidth, the ability to receive video data is different, and the settings are different according to the needs of different users. Therefore, a scalable codec technology is needed to dynamically adjust the code stream rate according to the link bandwidth. The H.264SVC codec technology can just meet the different needs of different terminals for the same service. [0003] At the same time, with the rapid growth of video services, the emergence of high-defini...

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Problems solved by technology

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a real-time streaming media recombination algorithm based on SVC under multi-path parallel transmission, the purpose is to (1) realize a basic layer and The real-time frame reorganization algorithm of enhancement layer data, in order to achieve the smoothness of terminal video playback under multi-path parallel transmission and dynamically adjust the video resolution according to the quality of the network; (2) In order to optimize the H. 264SVC format stream media service real-time reorganization algorithm to improve the performance of video playback; (3) to solve the reorganization problem when the transmission rates of the two paths do not match

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