Scalable video coding based on frequency spectrum in AVS

This paper presents a new algorithm of scalable video coding base on frequency spectrum. Data partition in MPEG-2 is an early scalable video coding base on spectrum, but it is rough in scalable granularity and low in practicability, while the algorithm proposed in this paper can achieve finer granularity of scalability (9 levels). The algorithm base on frequency spectrum has flexible scalability, low complexity and high efficiency, but it brings a problem of error accumulation through prediction. Because if it only transmits part of DCT coefficients, it makes reference frames of encoder differ from reference frames of decoder which results in error accumulation. This problem is solved by setting references frames in transform region in this paper. AVS-P2 is a new generation of video coding standard with independent intellectual property in China, and it has become a national standard. In this paper, the algorithm of scalable video coding is combined with AVS-P2 and is realized under the framework of AVS-P2. Finally, the algorithm was realized based on the software codec model version rm52j of AVS-P2 and testified the scalable video coding model through several tests.