Method and system for transmitting scalable coded videos in heterogeneous cellular network

Abstract

The invention discloses a method and a system for transmitting scalable coded videos in a heterogeneous cellular network. The method comprises steps as follows: coding videos into a base layer and an enhanced layer according to SVC (scalable video coding); transmitting the base layer videos and the enhanced layer videos according to connection states of a user terminal and a macro base station and a small base station, subjected to spectrum resource distribution, in the heterogeneous cellular network; if the user terminal is connected with the macro base station only, receiving the base layer transmitted by the macro base station; if the user terminal is connected with the macro base station and the small base station with a multi-stream technology, receiving enhanced layer videos transmitted by the small base station, receiving the base layer videos transmitted by the macro base station at the probability p, and receiving the base layer videos transmitted by the small base station at the probability 1-p. With the adoption of the method and the system, high-performance transmission of the scalable videos in the heterogeneous cellular network is realized, and the lower video interruption rate and the higher video high-definition rate are kept.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method and system for transmitting scalable coded video in a heterogeneous cellular network. Background technique [0002] The emergence of mobile communication and mobile computing has resulted in explosive growth of data traffic, especially mobile video. In mobile video, applications such as video-on-demand and video conferencing are becoming more and more popular. At the same time, user terminals are also diverse in terms of display resolutions and processors. Therefore, how to make mobile video meet the differentiated needs of users is an important issue. Scalable Video Coding (SVC for short) is an extension of H.264 / MPEG-4 AVC, which encodes a video stream into a base layer code stream and multiple enhancement layer code streams. The code stream of the enhancement layer and the code stream of the base layer can be decoded together, which can improve the qua...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this scheme is that the wireless sub-channel has time-varying characteristics, and the sub-channel state is constantly changing, and the measured sub-channel state information may be out of date, which may lead to the following adverse consequences: when the sub-channel quality suddenly deteriorates, Multi-layer video streams are transmitted to the user terminal, resulting in video user terminal stuttering; when the sub-channel quality suddenly improves, non-HD video is still transmitted to the user terminal, which wastes bandwidth and affects user experience

Images