The visual disturbing discontinuities at the block boundaries

which are called block artifacts

might arise in the reconstructed pictures

especially in low bit-rate applications

because the block-based motion compensation prediction

transform and quantization are adopted in the hybrid video coding standards.A deblocking filter

projections onto convex sets

and lapped orthogonal transform behave as the candidate technologies for reducing the block effects in signal processing.This paper analyzes and integrates the systematic architecture of video coding

achieves a deblocking hybrid video coding framework on the basis of a lapped orthogonal transform with time-domain pre- and post-filtering

and discusses the key technology issues including overlap mode choice within the framework.The experimental outcomes are shown to improve the subjective quality of video pictures with a comparative rate-distortion performance

compared to the traditional framework.