PROJECT PROPOSAL HEVC DEBLOCKING FILTER AND ITS IMPLIMENTATION RAKESH SAI SRIRAMBHATLA UTA ID: 1000869391 EE 5359 Under the guidance of DR. K. R. RAO

OBJECTIVE Scope of this project is to primarily focus on the study of in-loop deblocking filter in HEVC Besides this study, modification is done on the deblocking filter which results in the performance improvement of the codec. To compare the HEVC performance after implementing in HM codec with H.264/AVC codec performance using processor clock cycle, mean square error (MSE) and signal to noise ratio (SNR).

HEVC OVERVIEW High Efficiency Video Coding (HEVC) is currently being prepared as the newest video coding standard of the ITU-T Video Coding Experts Group and the ISO/IEC Moving Picture Experts Group. Joint collaborative team on video coding (JCT-VC) developed HEVC video coding standard. JCT-VC is a joint partnership team between video coding experts group (VCEG) and moving picture experts group (MPEG).

HEVC has many advantages over previous coding standards H. 264 and H HEVC has many advantages over previous coding standards H.264 and H.261, like significant rate distortion efficiency achieving higher bit rate reduction, error resilience and is most network friendly compared to other standards. The main goal of the HEVC standardization effort is to enable significantly improved compression performance relative to existing standards—in the range of 50% bit-rate reduction for equal perceptual video quality

VIDEO COMPRESSION STANDARDS SOFTWARE MAIN APPLICATION YEAR JPEG2000 JasPer IMAGE 2000 H.264/MPEG-4 part 10 JM software ADVANCED VIDEO CODING 2003 HEVC HM Software 2013

GENERATIONS OF VIDEO CODING STANDARDS

GOP - Group Of Pictures ( Video Frames ). I-Intra Frame : P – Predicted frame : B – Bidirectional predicted frame Order in which different types of frames are placed makes a GOP structure A classic GOP structure is shown below

BLOCK DIAGRAM OF HEVC ENCODER

STRUCTURE OF HEVC CODEC

DEBLOCKING FILTER AND ITS WORKING In HEVC, two processing steps, namely a deblocking filter (DBF) followed by an SAO filter, are applied to the reconstructed samples before writing them into the decoded picture buffer in the decoder loop. The deblocking filter is intended to reduce the blocking artifacts due to block-based coding. A deblocking filter similar to the one used in H.264/MPEG-4 AVC is operated within the interpicture prediction loop.

The deblocking filter in HEVC has been designed to improve the subjective quality while reducing the complexity. The latter consideration is important since the deblocking filter of the H.264/AVC standard, constitutes a significant part of the decoder complexity The deblocking filter is applied to all samples adjacent to a PU or TU boundary except the case when the boundary is also a picture boundary

Schematic showing the edges of Prediction unit, Transform unit and picture boundary

Scope of this project To study the unified crossbased approach of deblocking filtering in HEVC codec using HM software. To understand and implement a low complexity offsets perceptual optimization for deblocking filtering unit in HM codec . To compare the HEVC performance in HM codec with H.264/AVC codec performance using processor clock cycle, mean square error (MSE) and signal to noise ratio (SNR).

REFERENCES [1] G.J Sullivan et al, “Overview of the H.264/AVC Video Coding Standard”, IEEE Trans. CSVT, vol.13, pp. 560-576, July. 2003 [2] G.J. Sullivan et al, “Overview of the high efficiency video coding (HEVC) standard”, IEEE Trans. CSVT, vol.22, pp. 1649-1668, Dec. 2012 [3] G.J. Sullivan et al, “Standardized extensions of High Efficiency Video Coding (HEVC)”, IEEE Journal Selected topics in signal processing, vol. 7, pp. 1001-1016, Dec. 2013 [4] G.J. Sullivan et al, “Comparison of the Coding Efficiency of Video Coding Standards-Including High Efficiency Video Coding (HEVC)”, IEEE Trans. CSVT, Vol. 22, pp. 1669-1684, Dec.2012

[5] http://www. vcodex. com/images/uploaded/342512928230717 [5] http://www.vcodex.com/images/uploaded/342512928230717.pdf , URL for document on introduction to HEVC [6 ] http://en.wikipedia.org/wiki/Scalable_Video_Coding Wikipedia URL for scalable video coding which has the definitions of video coding standards. [7 ] http://www.youtube.com/watch?v=f9n-7mgNsNQ URL for NPTEL video on basics of video coding standards. [8] http://en.wikipedia.org/wiki/Inter_frame Wikipedia search URL for types of frames in video compression. [9] G.J. Sullivan; J. Ohm; W.-J. Han and T. Wiegand, “Overview of the High Efficiency Video Coding (HEVC) Standard”, IEEE Trans. on CSVT, vol. 22, Issue: 12, pp. 1649-1668, Dec 2012. [10] N. Ling, “High efficiency video coding and its 3D extension: A research perspective," 7th IEEE, Trans. on ICIEA, pp. 2150-2155, July 2012.   [

[11] M. Li et al, “De-blocking Filter Design for HEVC and H [11] M. Li et al, “De-blocking Filter Design for HEVC and H.264/AVC”, PCM 2012, LNCS 7674, pp. 273–284, 2012.   [12] M. Naccari et al, “Low Complexity Deblocking Filter Perceptual Optimization For The HEVC Codec”, 18th IEEE International Conference on Image Processing, pp. 737-740, 2011. [13] A. Norkin et al, “HEVC Deblocking Filter”, IEEE Transactions on Circuits and Systems for Video Technology, Vol. 22, No. 12, pp. 1746-1754, Dec. 2012. [14] JM software download for H.264/AVC: http://iphome.hhi.de/suehring/tml/ [15] HM codec download for H.265: https://hevc.hhi.fraunhofer.de/svn/svn_HEVCSoftware/branches [16] HEVC standard test video sequences: ftp://ftp.tnt.uni-hannover.de/testsequences