MPEG 2-Based Video Coding with Three-Layer Mixed Scalability
CAIP '01 Proceedings of the 9th International Conference on Computer Analysis of Images and Patterns
Managing Drift in DCT-Based Scalable Video Coding
DCC '01 Proceedings of the Data Compression Conference
Multimedia Traffic Support for Asynchronous Ad hoc Wireless Networks
BROADNETS '04 Proceedings of the First International Conference on Broadband Networks
Content-adaptive wireless streaming of instructional videos
Multimedia Tools and Applications
Interactive Content-aware Video Streaming System with Fine Granularity Scalability
Journal of VLSI Signal Processing Systems
Scalable coding and wireless streaming of lecture videos for mobile learning
Advanced Technology for Learning
Benefits and costs of scalable video coding for internet streaming
Journal of Visual Communication and Image Representation
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A combined subband-DCT approach for spatial scalable video coding is presented. The high-resolution input signal is decomposed into four spatial subband signals. The low-frequency subband is used as the low-resolution signal and is separately coded in the base-layer bitstream, and the high-frequency subband signals are coded in the enhancement-layer bitstream. The low-resolution signal is reconstructed from the base-layer bitstream and the high-resolution signal is reconstructed using both the base- and the enhancement-layer bitstream. Similar to MPEG, DCT-based hybrid coding techniques are applied for the coding of the subband signals, but an improved motion-compensated prediction is used for the low-resolution signal. Additionally, SNR scalability is introduced to allow a flexible bit allocation for the base and the enhancement layer. Experimental results at a bit rate of 6 Mbit/s show that the reference coder MPEG spatial scalable profile (SSP) leads to a loss of more than 2.2-dB peak signal-to-noise ratio (PSNR) compared with nonscalable MPEG-2 coding at the same bit rate, whereas the proposed combined subband-DCT scheme is able to achieve a decrease of less than 0.4 dB in PSNR