MPEG: a video compression standard for multimedia applications
Communications of the ACM - Special issue on digital multimedia systems
Algorithms for Manipulating Compressed Images
IEEE Computer Graphics and Applications
Transcoding Of MPEG-2 Video in the Frequency Domain
ICASSP '97 Proceedings of the 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '97) -Volume 4 - Volume 4
Manipulation and compositing of MC-DCT compressed video
IEEE Journal on Selected Areas in Communications
Fast algorithms for DCT-domain image downsampling and for inverse motion compensation
IEEE Transactions on Circuits and Systems for Video Technology
Adaptive motion-vector resampling for compressed video downscaling
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
A fast scheme for image size change in the compressed domain
IEEE Transactions on Circuits and Systems for Video Technology
Image resizing in the compressed domain using subband DCT
IEEE Transactions on Circuits and Systems for Video Technology
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Digital video databases are widely available in compressed format. In many applications such as video browsing, picture in picture, video conferencing etc. data transfer at lower bit rate is required. This requires downscaling of the video before transmission. The conventional spatial domain approach for downscaling video is computationally very expensive. The computation can greatly be reduced if downscaling and inverse motion compensation (IMC) are performed in Discrete Cosine Transform (DCT) domain. There are many algorithms in the literature to perform IMC in the DCT domain. In this paper, we propose an efficient integrated technique to perform IMC and downscaling in DCT domain. This new approach results in significant improvement in computational complexity.