Video Frame Sub-region Segmentation for Bandwidth Reduction
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Solution Overview
Problem
The increasing resolution of CCTV cameras results in large amounts of video data, making it difficult to transmit over limited broadband networks, necessitating a technology to reduce transmission bandwidth while maintaining video quality.
Innovation Solution
A video data processing method that selects and divides video frames into sub-regions, generates sub-video streams, and adjusts quantization coefficients based on object importance and similarity, allowing for efficient transmission over reduced bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If video resolution is increased to improve surveillance quality, then video quality is improved, but transmission bandwidth requirement increases
Solution Approach 1:
The patent divides video frames into multiple sub-regions (e.g., 4x4 grid) and processes each sub-region independently. This segmentation allows selective transmission of only important sub-regions containing objects of interest, reducing the total amount of data transmitted while maintaining quality where it matters most.
Solution Approach 2:
The patent applies different quantization coefficients to different sub-regions based on their importance. Sub-regions containing objects of interest use lower quantization coefficients (higher quality), while background sub-regions use higher quantization coefficients (lower quality). This local differentiation maintains overall video quality perception while reducing total bandwidth requirements.
2Loss of information
If all video frames are transmitted to maintain complete video information, then video completeness is improved, but transmission data volume increases
Solution Approach 1:
The patent extracts and identifies sub-regions containing objects of interest from each video frame using object detection algorithms. Only these extracted important sub-regions are transmitted, while redundant background areas are omitted or heavily compressed, significantly reducing transmission data volume while preserving essential video information.
Solution Approach 2:
Instead of transmitting complete video frames, the patent transmits only partial information - specifically the important sub-regions containing objects of interest. This partial action approach reduces transmission data volume while maintaining sufficient video completeness for surveillance purposes.
3Quantity of substance
If video data is compressed to reduce transmission bandwidth, then transmission bandwidth is reduced, but video quality deteriorates
Solution Approach 1:
The patent applies adaptive quantization coefficients to different sub-regions based on their importance. Important sub-regions containing objects use lower quantization coefficients to maintain high quality, while less important background sub-regions use higher quantization coefficients for greater compression. This local quality differentiation resolves the contradiction by maintaining quality where needed while achieving compression where acceptable.
4Quantity of substance
If selective frame sampling is used to reduce transmission data, then transmission data volume is reduced, but video detail information is lost
Solution Approach 1:
The patent segments each video frame into multiple sub-regions and applies object detection to identify important areas within each frame. This segmentation allows the system to capture detailed information from critical sub-regions even when using frame sampling, preventing loss of important video detail information while still reducing overall transmission data volume.
Data Source
AI summary
Provided is a method for processing video data. The method includes storing data of a video captured by a camera, selecting one or more video frames from among a plurality of video frames constituting at least a portion of the stored video data, dividing the one or more selected video frames into a plurality of sub-regions, and arranging the plurality of sub-regions according to a predetermined arrangement order and generating a sub-video stream, which includes the plurality of arranged sub-regions as a plurality of sub-video frames.