A Modular Post-Processing Scheme for Low Bit-Rate Video Coding

 This paper proposes a method to remove blocking and ringing artifacts in low bit-rate block-based video coding. The proposed deblocking filter has 2 separate filtering modes, which are selected by pixel behavior around the block boundary. In each mode, proper one-dimensional filtering operations are performed across the block boundary along horizontal and vertical directions, respectively. Even though the proposed filtering is quite simple, it improves both subjective and objective image qualities for various image features. The modular structure of the proposed algorithm makes it possible to adjust the overall complexity depending on the available computational power of the decoder.