Fine Granular Scalable Video Coding Based On The Image Object

With the development of computer and communications technology,real-time video and media transmission becomes an inevitable trend.However,the bandwidth of network is limited and real-time changed and the networks of different users are significantly different at the same time,which are the reasons for the difficulties of real-time video and media transmission.The scalable video coding sequence is the most suitable method to solve above problem. The video sequence is usually separated into two layers by scalable video coding,in which the basic layer and enhancement layer are included.The basic layer is must be transmitted,in which basic information is contained and bitrate is lower.The enhancement Layer is an option transmission,which can be cut off even non-transmission when the bandwidth is insufficient. So the enhancement layer transmission is more,the image quality is better.The scalable video streams are able to adapt to complicated fluctuations of network bandwidth because the video streams can be self-regulated within the scope of a large bitrate.Secondly,for the loss of enhancement layer data packet will not affect the other frame and the quality of video sequence,the video sequence generated by the scalable video coding has better robustness.Whereas,the encoding rate of the scalable video is less efficient,which is low 3 db compared with the traditional non-hierarchical coding method.In order to improve coding efficiency,a new fine granular scalable video coding method based on the image object is introduced based on the analysis of the fine-granularity-scalable and the coding based on the image object,in which motion compensation technology in enhancement layer is employed to improve the coding efficiency.The high spatial resolution enhancement layer is induced to obtain a better classification,which can be applied in the transmission of the spatial resolution video that needed to be changed.The selectively enhance is utilized in while plane coding to improve the video quality of the interested region.The simulation is carried on the NS-2 network simulator,which shows that the coding efficiency and the image quality can be improved and the video sequence space scalability can be provided,either.