Supporting region-of-interest cropping through constrained compression
MM '08 Proceedings of the 16th ACM international conference on Multimedia
Supporting region-of-interest cropping through constrained compression
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
Event-driven video adaptation: A powerful tool for industrial video supervision
Multimedia Tools and Applications
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We describe a scheme that achieves spatially scalable coding of video by employing nonscalable video encoders (e.g., MPEG-2 main profile), along with a downsampler and an upsampler. The scheme is illustrated for the case of coding video at two resolutions. The enhancement layer is coded in two steps by first exploiting the spatial redundancy and then exploiting the temporal redundancy. Hence, the scheme has a separable implementation. Results are presented for five different sequences, coded for three different combinations of base and enhancement layer bit rates. When MPEG-2 main profile is used for the nonscalable encoders, the results obtained are comparable to the performance of MPEG-2 spatial scalability profile.