An Adaptive Deblocking Filter to Improve the Quality of the HEVC Standard

Abstract

In this paper, we present an adaptive deblocking filter to improve the video quality for high efficiency video coding (HEVC) scheme. The HEVC standard is a hybrid coding scheme using block-based prediction and transform encoding/decoding. At the decoding step, the boundary of any two adjacent blocks causes visual discontinuities called blocking artifacts that can be removed using deblocking filter. Conventional approaches, including the HEVC standard, tend to remove those artifacts using two offset parameters that are defaulted to 0. However, such a choice is not necessarily suitable to encode/decode all video sequences. The proposed approach reduces an exhaustive search among a set of candidate offsets to eventually select the best offsets adaptively (i.e., for each frame) according to some characteristics of the data sequences. Improvements are shown using the proposed approach in terms of ratedistortion (RD) performance as opposed to the HEVC standard without changing the compression ratio and with negligible change in the encoding/decoding time.

Enhancing the Quality of Medical Images Containing Blur Combined with Noise Pair

“…Eldeken, and Salama [15], the deblocking filter process of the HEVC standard modified. The modification was based on determining better offset parameters in the filtering process to remove the blocking artifacts on the decoded video sequences.…”

Efficient Multimedia Transmission over Scalable IoT Architecture

“…In comparison with the standard method and H.264 compression of the media files, the proposed method saves about 4.8 times more storage space in the MCS. This applies due to the fact that by using HEVC compression standard for media files, there are about the half of bitrate (50%) savings, without degrading the quality [18], [19], [56]. Therefore, a media file compressed with H.264 standard has about 2 times more size than the other one with HEVC compression standard.…”