VIVOTEK’s Smart Stream is a state-of-the-art video encoder enhancement that is fully compatible with both H.264 and H.265 standards. Through a collection of algorithms that analyze the video stream in real time, details of regions of interest and specific movements are prioritized and preserved with fine-tuned video settings. Optimizing video surveillance, VIVOTEK Smart Stream can significantly lower bandwidth and storage requirements without sacrificing visual quality. In some cases, it can reduce storage usage by up to 80%. As a world leader in video compression, VIVOTEK constantly innovates new technologies to render encoding more efficient and provide and ever smarter Smart Stream.
Advanced algorithms detect motion and automatically enhance video quality for these moving objects or persons. Other regions are rendered with a relatively lower visual quality, which reduces overall video bitrate. The system can also be configured to use a combination of both ROI and automatic movement detection. For example, in a traffic monitoring application, only the road and the vehicles on it need to be captured at high resolution, but surrounding buildings are of no interest, so a lower baseline video quality for those areas is adequate.In this scenario, Smart Stream auto mode saves 30% of the original bandwidth required, while the detail of moving objects is kept.
I-frames consume the most bitrate within the encoded video stream. Therefore, the longer the I-frame interval, the lower the overall bandwidth of the video will be. However, a longer I-frame interval will also introduce more encoding propagation errors and side effects for the recording application. By analyzing the scene, Dynamic Intra-Frame Period can optimize the I-frame interval to reduce bit rate without compromising video quality. In doing so, Dynamic Intra Frame Period allows for a maximum reduction of bandwidth, while preserving the highest video quality for objects of interest.
Smart Q reduces bitrate by using real-time scene information. The scene complexity is analyzed and can be dynamically separated into several blocks. Each block is encoded with an optimized compression parameter to maintain visual quality and reduce bitrate.
Analytic Scenes of Smart Q
By analyzing the amount of motion in the scene, Smart FPS can further reduce bandwidth without missing important changes in the scene. Because video compression is most effective in scenes that do not change, Smart FPS will treat the scene as static when there is barely any motion detected. Through this technique, it can reduce bandwidth without changing the frame rate and be compatible with VMS and video players. For example, scenes like indoor hallways that are frequently used will see tremendous bandwidth reduction when Smart FPS is applied.
VIVOTEK unceasingly enhances Smart Stream by adding different features, including ROI, Dynamic Intra Frame Interval, Smart Q and smart FPS. The Smart Stream features table below indicates including features included in each generation.
|Features||ROI||Dynamic Intra Frame Period||Smart Q||Smart FPS|
|Smart Stream II||V||V|
|Smart Stream III||V||V||V||V|
Smart Stream Features Table
Finally, the below bandwidth comparison table displays network bandwidth reductions when smart stream generation is applied on the same original video stream.