公开(公告)号：US20240276045A1

公开(公告)日：2024-08-15

申请号：US18624325

申请日：2024-04-02

申请人： PORTSMOUTH NETWORK CORPORATION

发明人： Eliezer Aloni ,  Gal Mor ,  Noam Brousard

IPC分类号： H04N21/2662 ,  H04L9/40 ,  H04L12/28 ,  H04L12/64 ,  H04N21/222 ,  H04N21/2343 ,  H04N21/235 ,  H04N21/2362 ,  H04N21/2389 ,  H04N21/239 ,  H04N21/24 ,  H04N21/435 ,  H04N21/63 ,  H04N21/6408 ,  H04N21/647 ,  H04N21/84

CPC分类号： H04N21/2662 ,  H04L12/2852 ,  H04L12/2878 ,  H04N21/222 ,  H04N21/2343 ,  H04N21/234363 ,  H04N21/23439 ,  H04N21/235 ,  H04N21/2362 ,  H04N21/2389 ,  H04N21/2393 ,  H04N21/2402 ,  H04N21/435 ,  H04N21/631 ,  H04N21/6408 ,  H04N21/64738 ,  H04N21/84 ,  H04L2012/6478 ,  H04L63/0428

摘要： A system and method for bandwidth management by controlling the bit rate of a signal stream in real time according to available link bandwidth. Applications include multiple-channel video data streams over a limited-bandwidth link such as a Digital Subscriber Line. A video signal is transrated at the head end to multiple streams having different bit rates, by a multirating device which sends the multiple streams over a network, along with metadata containing information about the data structure and parameters of the streams. At the network access edge, a demultirating device uses the metadata to select the stream with the highest video quality whose bit rate does not exceed the available bandwidth of the end-user's access link. This scheme provides multiple unicast signals to different end-users in place of a single multicast signal, supports multiple high-definition channels over a limited bandwidth link, and is compatible with standard encryption methods.