Joint Collaborative Team On Video Coding Jct Vc Contribution-Books Pdf

Joint Collaborative Team on Video Coding JCT VC Contribution
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d coeff sign flag indicates sign information of the non zero coefficients. e coeff abs level remaining indicates remaining absolute level value. Among five syntax elements the bins of significant coeff flag coeff abs level greater1 flag and. coeff abs level greater2 flag are encoded with adaptive context models through regular mode. coeff sign flag and binarized bins of coeff abs level remaining are encoded with fixed equal probability. model through bypass mode The former is referred to as context coded bins and the latter is referred to as. bypass bins Context coded bin coding is one of the main bottlenecks of HTM throughput. Table 1 shows an example of residual coding in a sub block In the HEVC standardization it was asserted. to encode coeff abs level greater1 flag and coeff abs level greater2 flag only for a few starting non. zero coefficients in inverse scan order 1 Note that in Table 1 coeff abs level greater1 flag and. coeff abs level greater2 flag are encoded only for the first 8 and 1 non zero coefficients in a sub block. respectively This is for improving CABAC throughput by reducing context coded bins and it is applied. for both texture and depth videos in the current HTM Although these flags are designed by considering. trade off coding performance and throughput improvement it is optimized for texture videos Thus in. this proposal we targets on improving the CABAC throughput in depth video coding. Table 1 Example of residual coding in HTM,Coding order. Scanning Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0. Coefficient 0 1 1 0 2 4 1 4 4 2 6 4 7 6 12 18, significant coeff flag 0 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1. coeff abs level greater1 flag 0 0 1 1 0 1 1 1,coeff abs level greater2 flag 0. coeff sign flag 0 1 0 0 1 1 0 0 1 0 0 0 1 0,coeff abs level remaining 2 2 2 0 5 3 6 5 10 17. 2 Proposed method, To find the best trade off performance and throughput improvement for depth videos we tested different.
N 0 2 and 4 values Comparing experimental results in the proposed method we set N to 0 i e we do. not encode both coeff abs level greater1 flag and coeff abs level greater2 flag for depth videos. Table 2 shows an example of the proposed scheme Compared with the coded symbols in Table 1 the. HTM method 8 coeff abs level greater1 flags and 1 coeff abs level greater2 flags are removed in. depth coding The value of coeff abs level remaining is adjusted appropriately for the values of. coeff abs level greater1 flag and coeff abs level greater2 flag. Table 2 Example of residual coding in the proposed scheme. Coding order, Scanning Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0. Coefficient 0 1 1 0 2 4 1 4 4 2 6 4 7 6 12 18, significant coeff flag 0 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1. coeff abs level greater1 flag,coeff abs level greater2 flag. coeff sign flag 0 1 0 0 1 1 0 0 1 0 0 0 1 0, coeff abs level remaining 0 0 1 3 3 3 1 5 3 6 5 10 17. Page 2 Date Saved 2012 10 22, Table 3 shows the number of context coded bins for a 4 4 sub block in worst case scenario As shown.
the proposed scheme reduces the maximum numbers of context coded bins from 25 to 16 This rate is. 36 of context coded bins in CABAC level coding, Table 3 Comparison of maximum number of context coded bins in worst case scenario. HTM 4 0 Proposed Method,significant coeff flag 16 16. coeff abs level greater1 flag 8 0,coeff abs level greater2 flag 1 0. Total 25 16,3 Simulation Results, We implemented the proposed high throughput CABAC method into the HTM 4 0 1 software 2. Simulations were performed using common test conditions 3 Table 4 Table 5 and Table 6 show the. results of the proposed scheme From these results we determine N 0 As shown there is maximum. 0 1 BD Rate loss on average Table 7 Table 8 and Table 9 are 2 views test cases In this experiment. we did not check processing time However since no complex process is added for the proposed scheme. we expect that there is no significant processing time increase. Table 4 Experimental results 3 views test case coeff abs level greater1 flag 4. video synthesized,video 0 video 1 video 2 coded synthesized.
Balloons 0 0 0 0 0 0 0 0 0 0 0 0,Kendo 0 0 0 0 0 0 0 0 0 0 0 0. Newspapercc 0 0 0 0 0 0 0 0 0 0 0 0,GhostTownFly 0 0 0 0 0 0 0 0 0 0 0 0. PoznanHall2 0 0 0 0 0 0 0 0 0 0 0 0,PoznanStreet 0 0 0 0 0 0 0 0 0 0 0 0. UndoDancer 0 0 0 0 0 0 0 0 0 0 0 0,1024x768 0 0 0 0 0 0 0 0 0 0 0 0. 1920x1088 0 0 0 0 0 0 0 0 0 0 0 0,Average 0 0 0 0 0 0 0 0 0 0 0 0.
Table 5 Experimental results 3 views test case coeff abs level greater1 flag 2. video synthesized,video 0 video 1 video 2 coded synthesized. Balloons 0 0 0 0 0 0 0 0 0 1 0 0,Kendo 0 0 0 0 0 0 0 0 0 0 0 0. Newspapercc 0 0 0 0 0 0 0 0 0 0 0 0,GhostTownFly 0 0 0 0 0 0 0 0 0 6 0 3. PoznanHall2 0 0 0 0 0 0 0 0 0 0 0 0,PoznanStreet 0 0 0 0 0 0 0 0 0 0 0 0. Page 3 Date Saved 2012 10 22,UndoDancer 0 0 0 0 0 0 0 0 0 0 0 0.
1024x768 0 0 0 0 0 0 0 0 0 0 0 0,1920x1088 0 0 0 0 0 0 0 0 0 1 0 1. Average 0 0 0 0 0 0 0 0 0 1 0 1, Table 6 Experimental results 3 views test case coeff abs level greater1 flag 0. coeff abs level greater2 flag 0,video synthesized,video 0 video 1 video 2 coded synthesized. Balloons 0 0 0 0 0 0 0 0 0 0 0 0,Kendo 0 0 0 0 0 0 0 0 0 0 0 0. Newspapercc 0 0 0 0 0 0 0 0 0 2 0 1,GhostTownFly 0 0 0 0 0 0 0 0 0 1 0 1.
PoznanHall2 0 0 0 0 0 0 0 0 0 1 0 1,PoznanStreet 0 0 0 0 0 0 0 0 0 1 0 1. UndoDancer 0 0 0 0 0 0 0 0 0 0 0 0,1024x768 0 0 0 0 0 0 0 0 0 1 0 1. 1920x1088 0 0 0 0 0 0 0 0 0 1 0 0,Average 0 0 0 0 0 0 0 0 0 1 0 1. Table 7 Experimental results 2 views test case coeff abs level greater1 flag 4. video 0 video 1 video only synthesized only coded synthesized. Balloons 0 0 0 0 0 0 0 1 0 0,Kendo 0 0 0 0 0 0 0 1 0 0. Newspapercc 0 0 0 0 0 0 0 0 0 0,GhostTownFly 0 0 0 0 0 0 0 0 0 0.
PoznanHall2 0 0 0 0 0 0 0 0 0 0,PoznanStreet 0 0 0 0 0 0 0 0 0 0. UndoDancer 0 0 0 0 0 0 0 1 0 0,1024x768 0 0 0 0 0 0 0 0 0 0. 1920x1088 0 0 0 0 0 0 0 0 0 0,Average 0 0 0 0 0 0 0 0 0 0. Table 8 Experimental results 2 views test case coeff abs level greater1 flag 2. video 0 video 1 video only synthesized only coded synthesized. Balloons 0 0 0 0 0 0 0 1 0 0,Kendo 0 0 0 0 0 0 0 1 0 0. Newspapercc 0 0 0 0 0 0 0 1 0 1,GhostTownFly 0 0 0 0 0 0 0 6 0 3.
Page 4 Date Saved 2012 10 22,PoznanHall2 0 0 0 0 0 0 0 0 0 0. PoznanStreet 0 0 0 0 0 0 0 0 0 0,UndoDancer 0 0 0 0 0 0 0 1 0 0. 1024x768 0 0 0 0 0 0 0 0 0 0,1920x1088 0 0 0 0 0 0 0 2 0 1. Average 0 0 0 0 0 0 0 1 0 1, Table 9 Experimental results 2 views test case coeff abs level greater1 flag 0. coeff abs level greater2 flag 0, video 0 video 1 video only synthesized only coded synthesized.
Balloons 0 0 0 0 0 0 0 1 0 0,Kendo 0 0 0 0 0 0 0 0 0 0. Newspapercc 0 0 0 0 0 0 0 2 0 1,GhostTownFly 0 0 0 0 0 0 0 1 0 1. PoznanHall2 0 0 0 0 0 0 0 1 0 0,PoznanStreet 0 0 0 0 0 0 0 1 0 0. UndoDancer 0 0 0 0 0 0 0 1 0 0,1024x768 0 0 0 0 0 0 0 1 0 0. 1920x1088 0 0 0 0 0 0 0 1 0 0,Average 0 0 0 0 0 0 0 1 0 0.
4 Conclusions, This contribution has presented a simplified CABAC coefficients level coding for depth map In the. proposed method we do not encode both coeff abs level greater1 flag and. coeff abs level greater2 flag therefore nine context coded bins are saved in each sub block Note that. all the modules and processes of current CABAC are kept unchanged and no additional module is needed. in the proposed scheme We recommend adoption of the proposed scheme in the next version of HTM. 5 References, 1 J Chen W Chien J Rajan J Sole and M Karczewicz Non CE1 throughput improvement on. CABAC coefficients level coding JCTVC H0554 San Jose CA February 2012. 2 HTM 4 0 1 Software https hevc hhi fraunhofer de svn svn 3DVCSoftware tags HTM 4 0 1. 3 D Rusanovskyy K M ller and A Vetro Common Test Conditions of 3DV Core Experiments. JCT2 A1100 Stockholm SE July 2012,6 Acknowledge, This research was supported a grant Establishing the Foundation of International Standardization for. Mobile Devices and Multimedia Convergence Technology from Improvement of Standards Technology. Program funded by Korean Agency for Technology and Standards Ministry of Knowledge Economy of. Page 5 Date Saved 2012 10 22,7 Patent rights declaration s. Gwangju Institute of Science and Technology GIST may have current or pending patent rights. relating to the technology described in this contribution and conditioned on reciprocity is. prepared to grant licenses under reasonable and non discriminatory terms as necessary for. implementation of the resulting ITU T Recommendation ISO IEC International Standard per. box 2 of the ITU T ITU R ISO IEC patent statement and licensing declaration form.


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