Patent Document ID: 8578436
Application ID: 13500069
Patent Flag: 1

Claim One:
1. A method for two time-scales video stream transmission control, wherein transmission control is divided into a long time-scale and a short time-scale, one long time-scale including several short time-scales, the method comprising the steps of: (A) in the long time-scale transmission control, calculating a current bandwidth through a Transmission Control Protocol (TCP) throughput model, and predicting a trend of network bandwidth by using an Exponential Smooth Model (ESM) according to the calculated current bandwidth; (B) in the short time-scale transmission control, using the trend of network bandwidth predicted through Step (A) as an initial value, according to a network transmission packet loss ratio, dividing a network status into three categories, namely light load, full load, and congestion, when the network status is the light load, increasing an estimated bandwidth through an additive factor; when the network status is the congestion, decreasing the estimated bandwidth through a multiplicative factor; and when the network status is the full load, keeping the estimated bandwidth unchanged; and, the multiplicative factor is decided by adopting the following equation: 
 ω=1−β·√{square root over ( P loss ( n ))} where ω is the multiplicative factor, P loss (n) is a packet loss ratio at time n, β is a coefficient, and βε[0,1].