The purpose of this paper is to improve allocation of the number of bits by estimating the target bits in H.264/AVC rate control.In the scheme,an enhancement method of the target unit-layer bit allocation is proposed,...The purpose of this paper is to improve allocation of the number of bits by estimating the target bits in H.264/AVC rate control.In the scheme,an enhancement method of the target unit-layer bit allocation is proposed,which uses a frame and unit complexity estimation to improve the existing mean absolute difference(MAD)complexity measurement.Using the statistical characteristics,we obtain change of occurrence bit about QP to apply the bit amount by QP from the video characteristics in the estimated bit amount of the current frame.Simulation results show that not only the proposed rate control scheme could achieve time saving of more than 99% over existing rate control algorithm,but also PSNR and bit rate were almost the same as the performance in all the sequences.展开更多
目前各运营商本地政企光传送网(Optical Transport Network,OTN)系统已覆盖大部分区域,结合某省运营商近年来在省内各本地网建设本地政企OTN系统的工程经验,通过分析当前使用的光通道数据单元(Optical Channel Data Unit k,ODUk)技术带...目前各运营商本地政企光传送网(Optical Transport Network,OTN)系统已覆盖大部分区域,结合某省运营商近年来在省内各本地网建设本地政企OTN系统的工程经验,通过分析当前使用的光通道数据单元(Optical Channel Data Unit k,ODUk)技术带来的局限性,对比ODUk技术和光业务单元(Optical Service Unit,OSU)技术,探讨本地政企OTN系统中OSU技术的建设思路。展开更多
基金supported by the MKE(The Ministry of Knowledge Economy),Korea,under the ITRC(Information Technology Research Center)support program supervised by the NIPA(National IT Industry Promotion Agency)(NIPA-2011-C1090-1121-0010)
文摘The purpose of this paper is to improve allocation of the number of bits by estimating the target bits in H.264/AVC rate control.In the scheme,an enhancement method of the target unit-layer bit allocation is proposed,which uses a frame and unit complexity estimation to improve the existing mean absolute difference(MAD)complexity measurement.Using the statistical characteristics,we obtain change of occurrence bit about QP to apply the bit amount by QP from the video characteristics in the estimated bit amount of the current frame.Simulation results show that not only the proposed rate control scheme could achieve time saving of more than 99% over existing rate control algorithm,but also PSNR and bit rate were almost the same as the performance in all the sequences.
文摘目前各运营商本地政企光传送网(Optical Transport Network,OTN)系统已覆盖大部分区域,结合某省运营商近年来在省内各本地网建设本地政企OTN系统的工程经验,通过分析当前使用的光通道数据单元(Optical Channel Data Unit k,ODUk)技术带来的局限性,对比ODUk技术和光业务单元(Optical Service Unit,OSU)技术,探讨本地政企OTN系统中OSU技术的建设思路。
