KEYWORDS: Electronic filtering, Video coding, Digital filtering, Standards development, Video, Quantization, Video processing, Copper, Image quality, Video compression
The emerging High Efficiency Video Coding (HEVC) standard uses a block-based coding scheme, which may cause blocking artifacts, especially at lower bitrates. An adaptive in-loop deblocking filter is used in the standard to reduce visible artifacts at block boundaries. The deblocking filter detects artifacts at the block boundaries and attenuates them by applying a selected filter. This paper will present deblocking decisions and filtering operations that are used in HEVC.
In this work, we present a multiple description coding (MDC) scheme for reliable transmission of compressed
three dimensional (3-D) meshes. It trades off reconstruction quality for error resilience to provide the best
expected reconstruction of 3-D mesh at the decoder side. The proposed scheme is based on multiresolution
geometry compression achieved by using wavelet transform and modified SPIHT algorithm. The trees of wavelet
coefficients are divided into sets. Each description contains the coarsest level mesh and a number of tree sets
coded with different rates. The original 3-D geometry can be reconstructed with acceptable quality from any
received description. More descriptions provide better reconstruction quality. The proposed algorithm provides
flexible number of descriptions and is optimized for varying packet loss rates (PLR) and channel bandwidth.
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