Dual Stream Master Stream sub-code stream

The dual stream uses a high bitrate code stream for local HD storage, such as QCIF/CIF/D1 encoding, where low bitrate streams are used for network transmission, such as QCIF/CIF encoding, while taking into account local storage and remote network transmission. Dual-stream can realize local transmission and remote transmission of two different bandwidth code flow needs, local transmission using high-bit stream can obtain higher HD recording storage, remote transmission using low stream to adapt to various networks such as CDMA/ADSL to achieve higher image smoothness.

Dual-stream in the existing network bottlenecks in the image quality and transmission quality, can break through the network bottleneck, according to the network bandwidth flexibly select the code stream format, to achieve local high-definition storage, while the back-end low-stream network transmission. In fact, dual-stream is a speed-up of network video surveillance, this creatively to widen the application of dual-stream, to realize arbitrary code stream Format Selection coding technology, so that the large-scale video surveillance system hundreds of thousands of cameras to generate massive video, audio, storage, alarm and management data, To ensure the stable operation of the transmission system in the case of limited network resources available to the user.

The main stream is used for local storage, and the sub-stream is suitable for the transmission of images on low-bandwidth networks.

Translated from http://blog.csdn.net/qinqqfirst/article/details/6531328

Dual Stream Master Stream sub-stream (RPM)