Minimum-drift digital video down-conversion.
Journal
Proceedings of the 7th ACM International Conference on Multimedia '99, Orlando, FL, USA, October 30 - November 5, 1999, Part 1.
Pages
277-284
Date Issued
1999
Author(s)
Alshaykh, Osama K.
Abstract
This paper presents a new technique for decoding a full-resolution video bitstream at low memory cost and displaying the signal at a lower resolution. Existing techniques solve the problem by storing the down-converted blocks into memory instead of the full-resolution blocks. While the memory is reduced, these techniques introduce drift errors because the decoder does not have the same pixels as the encoder in performing motion-compensated prediction. The approach proposed here alleviates the problem by tracking the drift at the decoder. It improves the video quality without any increase in decoder complexity. The effectiveness of the approach is evaluated using both objective and subjective tests. This minimum-drift approach is very simple to implement and can also be applied for memory reduction of a full resolution HDTV decoder.
Type
conference paper