Surveillance Camera Dual-Stream Encoding for Storage Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of large storage space occupation by video data from surveillance systems due to high frame rates and resolutions, leading to poor video smoothness and potential playback delays, especially when network conditions are poor.
Innovation Solution
A method involving parallel encoding with different sets of parameters (resolution, frame rate, and bitrate) to generate two types of videos: a first video for normal conditions and a second video for intrusion detection, optimizing storage space and playback quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If video is encoded with high resolution and high frame rate, then video quality and smoothness are improved, but storage space occupation increases
Solution Approach 1:
The patent divides video encoding into two separate streams: a first video stream with lower resolution and frame rate for normal monitoring, and a second video stream with higher resolution and frame rate for intrusion events. This segmentation allows the system to maintain high video quality when needed while reducing storage space occupation during normal operation.
Solution Approach 2:
The patent dynamically switches between different encoding parameters based on detected events. When intrusion is detected, the system transitions to encoding the second video stream with higher resolution and frame rate; when no intrusion is detected, it uses the first video stream with lower parameters. This dynamic adjustment optimizes both video quality and storage space usage.
2Speed
If video is encoded with high frame rate, then video smoothness is improved, but storage space occupation increases
Solution Approach 1:
The patent segments the frame rate requirement into two levels: the first video stream uses a lower frame rate suitable for normal monitoring, while the second video stream uses a higher frame rate for capturing fast-moving intrusion events. This segmentation reduces overall storage space occupation while maintaining smooth video playback when needed.
Solution Approach 2:
The patent changes the frame rate parameter dynamically based on intrusion detection. During normal operation, the system uses a lower frame rate to reduce storage space occupation. When intrusion is detected, the frame rate parameter is increased to improve video smoothness for capturing critical events.
3Loss of energy
If network bandwidth is limited, then transmission cost is reduced, but video playback smoothness deteriorates
Solution Approach 1:
The patent segments video transmission into two quality levels corresponding to the two encoding streams. The first video stream with lower bandwidth requirements is transmitted during normal operation, reducing network bandwidth consumption. The second video stream with higher quality is transmitted only when intrusion is detected, ensuring playback smoothness is maintained when it matters most.
Solution Approach 2:
The patent dynamically adjusts the video stream quality based on intrusion detection status. During normal operation, the system transmits the lower-quality first video stream to conserve network bandwidth. When intrusion is detected, it switches to transmitting the higher-quality second video stream to ensure smooth playback for security personnel reviewing critical events.
Data Source
AI summary
The present application provides a method for video data generation and storage, a camera device, and a video surveillance system. The camera device includes an image capturing unit, a video encoding unit, and a controller. The video encoding unit encodes an image captured by the image capturing unit with a first resolution, a first frame rate and a first bitrate to obtain a first bitstream, and performs parallel encoding on the image with a second resolution, a second frame rate and a second bitrate to obtain a second bitstream. The controller encapsulates the first bitstream into a first video and store the first video to a storage unit, and encapsulates the second bitstream into a second video when detecting an intrusion target in a monitored area, and store the second video to the storage unit. The storage space occupied by video data captured from the system is effectively reduced.