公开(公告)号：US08578436B2

公开(公告)日：2013-11-05

申请号：US13500069

申请日：2010-12-16

申请人： Bo Li ,  Hai-Miao Hu ,  Peng Wang ,  Shu Xian

发明人： Bo Li ,  Hai-Miao Hu ,  Peng Wang ,  Shu Xian

IPC分类号： H04N7/173 ,  G01R31/08 ,  H04B1/66

CPC分类号： H04N21/2662 ,  H04L47/38 ,  H04N21/23418 ,  H04N21/234354 ,  H04N21/2402 ,  H04N21/64769

摘要： A method for two time-scales video stream transmission control is proposed, which mainly includes the following three steps. Firstly, a model-based long time-scale bandwidth trend extraction step is proposed to calculate a current bandwidth through a Transmission Control Protocol (TCP) throughput model, and predict a trend of network bandwidth by using an Exponential Smooth Model (ESM) according to the calculated current bandwidth. Secondly, a short time-scale bandwidth fluctuation detection step is proposed to divide a network status into three categories and according to different network statuses, additively increase or multiplicatively decrease the estimated bandwidth. Thirdly, a target bit rate adjustment step based on two asymmetrical thresholds is proposed to set an up-threshold and a down-threshold of bandwidth to avoid frequently adjusting a target bit rate of an encoder. The method can satisfy the requirements of TCP-friendliness, real-time, and smoothness for the video transmission.

摘要翻译： 提出了一种用于两个时标视频流传输控制的方法，主要包括以下三个步骤。 首先，提出了一种基于模型的长时间带宽趋势提取步骤，以通过传输控制协议（TCP）吞吐量模型计算当前带宽，并且通过使用指数平滑模型（ESM）来估计网络带宽的趋势，根据 计算出的当前带宽。 其次，提出了一种短时间规模的带宽波动检测步骤，将网络状态划分为三类，并根据不同的网络状态，相加地增加或乘法地减少估计的带宽。 第三，提出了基于两个不对称阈值的目标比特率调整步骤来设置带宽的上限和下限，以避免频繁地调整编码器的目标比特率。 该方法可以满足视频传输的TCP友好性，实时性和平滑性要求。

公开(公告)号：US20130263200A1

公开(公告)日：2013-10-03

申请号：US13500069

申请日：2010-12-16

申请人： Bo Li ,  Hai-Miao Hu ,  Peng Wang ,  Shu Xian

发明人： Bo Li ,  Hai-Miao Hu ,  Peng Wang ,  Shu Xian

IPC分类号： H04N21/2662

CPC分类号： H04N21/2662 ,  H04L47/38 ,  H04N21/23418 ,  H04N21/234354 ,  H04N21/2402 ,  H04N21/64769

摘要： A method for two time-scales video stream transmission control is proposed, which mainly includes the following three steps. Firstly, a model-based long time-scale bandwidth trend extraction step is proposed to calculate a current bandwidth through a Transmission Control Protocol (TCP) throughput model, and predict a trend of network bandwidth by using an Exponential Smooth Model (ESM) according to the calculated current bandwidth. Secondly, a short time-scale bandwidth fluctuation detection step is proposed to divide a network status into three categories and according to different network statuses, additively increase or multiplicatively decrease the estimated bandwidth. Thirdly, a target bit rate adjustment step based on two asymmetrical thresholds is proposed to set an up-threshold and a down-threshold of bandwidth to avoid frequently adjusting a target bit rate of an encoder. The method can satisfy the requirements of TCP-friendliness, real-time, and smoothness for the video transmission.

摘要翻译： 提出了一种用于两个时标视频流传输控制的方法，主要包括以下三个步骤。 首先，提出了一种基于模型的长时间带宽趋势提取步骤，以通过传输控制协议（TCP）吞吐量模型计算当前带宽，并且通过使用指数平滑模型（ESM）来估计网络带宽的趋势，根据 计算出的当前带宽。 其次，提出了一种短时间规模的带宽波动检测步骤，将网络状态划分为三类，并根据不同的网络状态，相加地增加或乘法地减少估计的带宽。 第三，提出了基于两个不对称阈值的目标比特率调整步骤来设置带宽的上限和下限，以避免频繁地调整编码器的目标比特率。 该方法可以满足视频传输的TCP友好性，实时性和平滑性要求。