TY - GEN
T1 - Adaptive rate estimation for H.264/AVC intra mode decision
AU - Liao, Ke Ying
AU - Yang, Jar-Ferr
AU - Sun, Ming Ting
PY - 2008/9/16
Y1 - 2008/9/16
N2 - In this paper, a modified bit-rate estimation method is proposed to reduce the computation for 4×4 intra mode decision of H.264/AVC video encoder. The number of coded bits is modeled by a linear combination of existing coding parameters, which are highly related to the entropy coding of H.264/AVC. Furthermore, to improve the accuracy of the estimation, the proposed scheme is made adaptive to the information obtained from previously coded blocks. Comparing to the original rate distortion optimized (RDO) encoding process, which needs to calculate the actual encoded bits of H.264/AVC for each coding mode, the proposed adaptive rate estimation can save about 28% and 21% of the total encoding time for QCIF and VGA sequences, respectively. For the coding performance, the proposed method achieves nearly no loss in visual quality with only slight bit-rate increases.
AB - In this paper, a modified bit-rate estimation method is proposed to reduce the computation for 4×4 intra mode decision of H.264/AVC video encoder. The number of coded bits is modeled by a linear combination of existing coding parameters, which are highly related to the entropy coding of H.264/AVC. Furthermore, to improve the accuracy of the estimation, the proposed scheme is made adaptive to the information obtained from previously coded blocks. Comparing to the original rate distortion optimized (RDO) encoding process, which needs to calculate the actual encoded bits of H.264/AVC for each coding mode, the proposed adaptive rate estimation can save about 28% and 21% of the total encoding time for QCIF and VGA sequences, respectively. For the coding performance, the proposed method achieves nearly no loss in visual quality with only slight bit-rate increases.
UR - http://www.scopus.com/inward/record.url?scp=51449090698&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=51449090698&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2008.4517820
DO - 10.1109/ICASSP.2008.4517820
M3 - Conference contribution
AN - SCOPUS:51449090698
SN - 1424414849
SN - 9781424414840
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 1157
EP - 1160
BT - 2008 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP
T2 - 2008 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP
Y2 - 31 March 2008 through 4 April 2008
ER -