Support - Technical Term

Dual Stream

Dual Stream

It means a channel of video images passing through the video coder, and output 2 independent bit streams as shown in the figure:
The resolution, frame rate, bit rate and other parameters of output bit stream can be set independently. The output dual steam can meet different demands, for example, one for hard disk storage and the other for network transmission.


Double Common Intermediate Format, a format of color images whose resolution is 528 x 384 pixels (PAL) or 528 x 320 pixels (NTSC)

Dynamic Adjustment of Encoding Parameters

The user adjusted encoding parameters can take effect at once without pausing or restarting of network transmitting and recording.

In the surveillance system, for static monitoring scene, video can be recorded in low bit rate through reducing resolution, image quality, bit rate and frame rate, while changing of image scene requires higher resolution , bit rate and frame rate of video, etc to get high quality video stream. Since the above parameters can be dynamically modified, continuous images can be maintained without switching files frequently. And it does not only meet the requirement of high-quality images at critical moments, but also save the disk space and network bandwidth.