Interpolating DCT representation of digital video over time

Haim Schweitzer; Yanjun Zhang

doi:10.1117/12.205478

23 March 1995 Interpolating discrete cosine transform (DCT) representation of digital video over time

Haim Schweitzer, Yanjun Zhang

Proceedings Volume 2421, Image and Video Processing III; (1995) https://doi.org/10.1117/12.205478
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

Abstract

Changing video frame rate may require adding new frames. This can be done by interpolating the given frames over time. We describe a very fast algorithm for time interpolation of DCT encoded video. Given a sequence of DCT encoded frames, the algorithm produces the interpolated sequence of DCT encoded frames without computing DCT or inverse DCT. The idea is to exploit a simple shift property of DCT coefficients that holds for frame triplets. It is somewhat analogous to the shift property of Fourier coefficients that holds for frame pairs.

Citation Download Citation

Haim Schweitzer and Yanjun Zhang "Interpolating discrete cosine transform (DCT) representation of digital video over time", Proc. SPIE 2421, Image and Video Processing III, (23 March 1995); https://doi.org/10.1117/12.205478

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