Video Compression Using Hybrid DWT-DCT Algorithm

Abstract- Videos and images are one of the most important approaches to represent some data. Now a day’s all the communication process are working on such media. The main problem with this kind of media is its large size. Also this large data contains a lot of redundant information. Compressing the video helps to reduce the size and thus saves the transmission bandwidth and storage space. By considering the role played by image and video in communication it is necessary to develop a compression scheme that can achieve a high compression ratio while preserving the video quality. DWT (Discrete Wavelet Transform) and DCT (Discrete Cosine Transform) are the most commonly video compression techniques. DCT has high energy compaction and requires less computational resources, DWT on the other hand is a multiresolution transformation. But the compression ratio that can be achieved is low. The proposed method uses a Hybrid DWT-DCT algorithm on motion compensated frame by taking the advantages of both the method. The performance of the proposed method can be evaluated using compression ratio, PSNR and mean square error