TY - JOUR
T1 - DIRECT mode early decision optimization based on rate distortion cost property and inter-view correlation
AU - Zhang, Yun
AU - Kwong, Sam
AU - Xu, Long
AU - Jiang, Gangyi
PY - 2013/6
Y1 - 2013/6
N2 - In this paper, an Efficient DIRECT Mode Early Decision (EDMED) algorithm is proposed for low complexity multiview video coding. Two phases are included in the proposed EDMED: 1) early decision of DIRECT mode is made before doing time-consuming motion estimation/disparity estimation, where adaptive rate-distortion (RD) cost threshold, inter-view DIRECT mode correlation and coded block pattern are jointly utilized; and 2) false rejected DIRECT mode macroblocks of the first phase are then successfully terminated based on weighted RD cost comparison between 16×16 and DIRECT modes for further complexity reduction. Experimental results show that the proposed EDMED algorithm achieves 11.76% more complexity reduction than that achieved by the state-of-the-art SDMET for the temporal views. Also, it achieves a reduction of 50.98% to 81.13% (69.15% on average) in encoding time for inter-view, which is 29.31% and 15.03% more than the encoding time reduction achieved by the state-of-the-art schemes. Meanwhile, the average Peak Signal-to-Noise Ratio (PSNR) degrades 0.05 dB and average bit rate increases by -0.37%, which is negligible. © 1963-12012 IEEE.
AB - In this paper, an Efficient DIRECT Mode Early Decision (EDMED) algorithm is proposed for low complexity multiview video coding. Two phases are included in the proposed EDMED: 1) early decision of DIRECT mode is made before doing time-consuming motion estimation/disparity estimation, where adaptive rate-distortion (RD) cost threshold, inter-view DIRECT mode correlation and coded block pattern are jointly utilized; and 2) false rejected DIRECT mode macroblocks of the first phase are then successfully terminated based on weighted RD cost comparison between 16×16 and DIRECT modes for further complexity reduction. Experimental results show that the proposed EDMED algorithm achieves 11.76% more complexity reduction than that achieved by the state-of-the-art SDMET for the temporal views. Also, it achieves a reduction of 50.98% to 81.13% (69.15% on average) in encoding time for inter-view, which is 29.31% and 15.03% more than the encoding time reduction achieved by the state-of-the-art schemes. Meanwhile, the average Peak Signal-to-Noise Ratio (PSNR) degrades 0.05 dB and average bit rate increases by -0.37%, which is negligible. © 1963-12012 IEEE.
KW - Digital video broadcasting
KW - DIRECT mode
KW - early termination
KW - mode decision
KW - multiview video coding
UR - http://www.scopus.com/inward/record.url?scp=84878285562&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84878285562&origin=recordpage
U2 - 10.1109/TBC.2013.2253033
DO - 10.1109/TBC.2013.2253033
M3 - RGC 21 - Publication in refereed journal
SN - 0018-9316
VL - 59
SP - 390
EP - 398
JO - IEEE Transactions on Broadcasting
JF - IEEE Transactions on Broadcasting
IS - 2
M1 - 6509444
ER -