Surveillance Video Transmission via Base and Enhancement Frame Segmentation
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Solution Overview
Problem
Existing video surveillance systems face challenges in transmitting high-quality images in real-time due to bandwidth constraints, leading to low-quality images that hinder detailed identification and require time-consuming manual searches for events, and complex storage management of independent video flows.
Innovation Solution
A method that codes images into base and enhancement video frames, transmitting base frames in real-time and storing enhancement frames for later use, allowing incremental quality enhancement and efficient bandwidth use, using scalable video formats like H.264 SVC, enabling quick and efficient transmission and storage of high-quality images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If images are coded in low quality format for real-time transmission, then bandwidth consumption is reduced and transmission speed is improved, but image quality deteriorates and detail identification becomes difficult
Solution Approach 1:
The video stream is segmented into two distinct formats: low-quality compressed video for real-time transmission and high-quality uncompressed video for storage. This segmentation allows each format to serve its specific purpose optimally - real-time monitoring and detailed analysis respectively - without compromising either transmission speed or image quality
Solution Approach 2:
The system introduces an intermediary storage unit that acts as a bridge between the transmitted low-quality video and the original high-quality video. When events are detected in real-time video, the storage unit provides the corresponding high-quality footage, serving as a mediator that connects the two quality levels and enables detailed analysis without requiring continuous high-bandwidth transmission
2Measurement precision
If high quality images are transmitted in real-time, then image detail is improved, but bandwidth consumption increases and transmission speed decreases
Solution Approach 1:
The video data is divided into two quality tiers stored in separate buffers. Low-quality compressed video occupies minimal bandwidth for real-time transmission, while high-quality video is stored locally without transmission. This segmentation eliminates the need to transmit large quantities of high-bandwidth data continuously
Solution Approach 2:
Instead of transmitting all high-quality video data in real-time, the system transmits only the necessary low-quality portion continuously, and selectively retrieves partial high-quality data only when events are detected. This partial action approach minimizes bandwidth consumption while maintaining the ability to access high-quality images when needed
3Adaptability or versatility
If low quality and high quality video frames are stored as independent flows, then storage flexibility is improved, but storage management complexity increases
Solution Approach 1:
The system merges the management of low-quality and high-quality video streams by establishing a synchronization relationship between them through a common timestamp and sequence numbering system. This unified management approach allows the storage unit to efficiently retrieve corresponding high-quality frames based on events detected in low-quality streams, reducing management complexity while maintaining storage flexibility
Data Source
AI summary
A method of transmission by a surveillance device to a control room, via a telecommunications network, of a series of images, includes steps, implemented by the surveillance device, of acquisition of a series of images, of coding of the series of images acquired into a series of base video frames including a first quantity of information and into at least one series of enhancement video frames of the series of base video frames, the series of enhancement video frames including a second quantity of information making it possible to enhance the quality of the series of images coded into the series of base video frames, of transmission in real time via the telecommunications network of at least the series of base video frames to the control room, and of storage of at least the series of enhancement video frames.