Video Images, In Addition To "block" Method

With the development at a full speed of information technology, the conventionally used analog signal is gradually replaced by the digital signal because it needs broader bandwidth and is vulnerable to noise. But one of the main problems of digital video transmission is its huge volume of data. It is difficult and even impossible to transmit and save the data. Thus, in order to transmit as many data as possible through the limited channel, and get real time images with high quality, it is necessary to compress the images as well.With the development of the communication and computer, video compression has been an active research area in the last decade. A series of international standards of video compression coding, such as H.26x, MPEG-1, MPEG-2, MPEG-4 and so on, have been developed by international standardization organization (ISO) and international telecommunication union (ITU) these years, which have greatly promoted the application of the video coding technology.With the development of the digital television technology, The scalable video coding is more effective than the traditional coding in the low code rate, lacks the QoS guarantee and the network different condition. It is recognized first choice plan for the wireless network and the Internet video transmission. The scalable video coding provides the code stream in the basic layer and the code stream in the enhancement layers. The basic code stream contains the basic information of the video signal, and satisfies the lowest request of the user. It can be decoded independently. The enhancement code stream contain some details of the video signal. It must be decoded with the basic code stream together. According to channel condition, it is decoded one or many layers, thus it obtains recovery to the different signal.The scalable video coder is desired in a multi-resolution environment, which could provide the users with video streams with various quality. But in a spatial scalable encoder, the blocking effect caused by the BDCT used in the base layer could disturb the prediction result in the enhancement layer, which will decrease the encoding efficiency. Thus If a deblocking filter were implemented to smooth the reconstructed image, the bad effect would be removed. In this paper, we applied an efficient wavelet-based soft-threshold deblocking algorithm to the spatial scalable video coding for eliminating the blocking effect and performanced a simulation. The result shows the significant efficiency.