JVT E079 slides

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Information about JVT E079 slides
Sports

Published on May 2, 2008

Author: Rina

Source: authorstream.com

A performance comparison of CABAC and VLC-base entropy codes for SD and HD sequences (JVT-E079r2):  A performance comparison of CABAC and VLC-base entropy codes for SD and HD sequences (JVT-E079r2) Iole Moccagatta (LSI Logic) Krishna Ratakonda (IBM) Conclusions and Recommendations:  Conclusions and Recommendations Performance analysis of CABAC and VLC-based entropy coders 21 test sequences, varying both in format (CIF, SD interlaced and progressive, HD interlaced) and content (movie, sport, natural content, and computer graphic) two encoder configurations (IBBP and IP) bitrate ranging from 150Kbit/s to 52Mbits/s CABAC achieves a large and consistent bitrate reduction 2.3 to 17.6% for CIF (IP) 6.3 to 14.8% for interlaced SD (IBBP) 5.3 to 22% for interlaced and progressive SD (IP) 7.1 to 31.2% for progressive SD (IBBP) 7 to 17.7% for interlaced HD (IBBP) example: about 11% for SD@1Mbits/s and HD@6Mbits (IBBP) In light of these results and of considerations in JVT-E116, recommend removal of VLC-based entropy coders from Main IBBP with periodical Intra refresh:  IBBP with periodical Intra refresh IBBP with one Intra every 1 sec (interlaced seq.) and 1.25 sec (progressive seq.); interlaced seq. coded in interlaced frame mode, progressive seq. coded in progressive frame mode; fixed Qp, no rate control, RD optimization on; four set of quantization scales: 40 (I), 40 (P), 43 (B) 32 (I), 32 (P), 33 (B) 24 (I), 24 (P), 26 (B) 20 (I), 20 (P), 22 (B) No ABT, no SI/SP, no error res. tools, one slice per picture. JM4.0c IBBP with periodical Intra refresh (2):  IBBP with periodical Intra refresh (2) Three interlaced SD test sequences (720x480, 4:2:0, 30fps): “Opening” (151 pictures): the opening of the Olympic games in Barcelona showing puppets and children in costumes performing in a crowded stadium (spatially and temporally tough); “Football” (142 pictures); “Basket'' (235 pictures): a basket game (spatially and temporally tough); Three progressive SD test sequences (720x480, 4:2:0, 24fps) in letter box format: “Golden1” (76 pictures): two people running across a library with flashes from shooting (spatially and temporally medium difficulty); “Golden2” (118 pictures): a person caught while falling (spatially medium difficulty, temporally tough); “Blackrain” (103 pictures): a fast motorcycle chase on the background of the NYC port (spatially medium difficulty, temporally tough). IBBP with periodical Intra refresh (3):  IBBP with periodical Intra refresh (3) Two interlaced HD test sequences (1080i, 4:2:0, 30fps): “Hawaii1” (177 pictures): rain falling over a tropical forest (spatial medium difficulty, temporally easy); “Hawaii2” (216 pictures): two background scenes with people and nature and a large foreground panning text containing additional nature scenes (spatially and temporally very tough). IBBP with periodical Intra refresh (4):  IBBP with periodical Intra refresh (4) Comparison of CABAC and CA-VLC performance using interlaced SD test sequences IBBP with periodical Intra refresh (4bis):  IBBP with periodical Intra refresh (4bis) PSNR-Y vs. bitrate for the interlaced SD test sequences IBBP with periodical Intra refresh (5):  IBBP with periodical Intra refresh (5) Comparison of CABAC and CA-VLC performance using progressive SD test sequences IBBP with periodical Intra refresh (5bis):  IBBP with periodical Intra refresh (5bis) PSNR-Y vs. bitrate for the progressive SD test sequences IBBP with periodical Intra refresh (6):  IBBP with periodical Intra refresh (6) Comparison of CABAC and CA-VLC performance using interlaced HD test sequences IBBP with periodical Intra refresh (6bis):  IBBP with periodical Intra refresh (6bis) PSNR-Y vs. bitrate for the interlaced HD test sequences IP w/o interlaced coding:  IP w/o interlaced coding IP with only the first frame coded as Intra; fixed Qp, no rate control, RD optimization on; Interlaced coding is not used; three set of quantization scales: 36 (I), 38 (P) 24 (I), 27 (P) 16 (I), 18 (P) No ABT, no SI/SP, no error res. tools, one slice per picture. JM4.2 IP w/o interlaced coding (2):  IP w/o interlaced coding (2) Three standard interlaced SD test sequences (720x480, 4:2:0, 30fps): “Cheer leaders”, “Mobile & Calendar”, and “Football” Four proprietary interlaced and progressive SD test sequences (720x480, 4:2:0, 24fps): “Marbles”: fast moving marbles against a white background. Japanese text on the bottom part of the screen scrolls from left to right (spatially easy, temporally tough). Interlaced. “Murdock”: commercial combining graphics and some natural images moving quickly. Has a 10 frames fade in the middle of the sequences (spatially medium difficulty, temporally medium difficulty). Progressive. “Turtle”: commercial with a still frame in the beginning and a fade to a slowly moving turtle (spatially and temporally easy except for the fade). Progressive. “Speedbike”: bikers move towards the camera and flash before the camera (spatially medium difficulty, temporally very tough). Interlaced. IP w/o interlaced coding (3):  IP w/o interlaced coding (3) Three standard and four proprietary CIF test sequences: same as above except “Pills” replaces “Marbles“; “Pills”: a computer generated animation of medicine pills going through the digestive tract (spatially medium difficulty, temporally tough, as smooth regions show blocking artifacts easily). IP w/o interlaced coding (4):  IP w/o interlaced coding (4)     IP w/o interlaced coding (5):  IP w/o interlaced coding (5)     IP w/o interlaced coding (6):  IP w/o interlaced coding (6)     Slide18:  ®

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