Video Image Area Extraction for Bandwidth Reduction
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Solution Overview
Problem
Current video call systems face challenges in effectively transmitting and displaying a portion of a captured video image between devices, particularly in adapting to different resolutions and communication methods, which affects the quality and usability of video calls.
Innovation Solution
A system and method that allow a device to track an object in a video image and transmit only the relevant portion of the image to another device, adjusting resolution and area of interest based on communication methods and user input, using area information to determine and modify the image transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the entire captured video image is transmitted to the external device, then the user can view the complete scene, but the transmission bandwidth and processing load increase significantly
Solution Approach 1:
The patent extracts and transmits only the selected area of interest from the full video image to the external device. The display device receives area information indicating the coordinates and dimensions of the selected region, then extracts and displays only that portion of the image, reducing transmission data while preserving the most relevant visual information for the user.
Solution Approach 2:
The patent segments the video image into multiple regions and transmits only the specific segment (area of interest) that the user has selected. By dividing the complete image into manageable portions and transmitting only the necessary segment, the system reduces overall transmission bandwidth consumption while maintaining image information quality for the relevant area.
2Measurement precision
If the video image resolution is increased to improve quality, then the image clarity improves, but the data transmission size and bandwidth requirements increase
Solution Approach 1:
The patent applies local quality enhancement by transmitting the selected area of interest at high resolution while reducing or eliminating transmission of the remaining image areas. The display device receives area information that specifies the high-resolution region of interest, allowing the system to concentrate bandwidth resources on improving the quality of the most important visual information rather than uniformly enhancing the entire image.
3Productivity
If the device transmits only a portion of the video image to reduce bandwidth usage, then transmission efficiency improves, but the user may lose context of the surrounding area
Solution Approach 1:
The patent uses area information as an intermediary data structure that conveys the spatial relationship and context of the selected region. The area information includes coordinates and dimensions that allow the display device to understand the selected area's position within the full image, preserving spatial context information even when transmitting only a portion of the video data.
4Adaptability or versatility
If the system adapts video transmission to different communication methods and resolutions, then compatibility across devices improves, but the system complexity increases
Solution Approach 1:
The patent implements a universal area information transmission mechanism that works across different communication methods and device resolutions. The area information data structure is designed to be resolution-independent, allowing the same transmission protocol to function effectively whether the devices use high-resolution or low-resolution displays, or different communication bandwidths, thereby achieving multi-functionality without proportionally increasing system complexity.
Data Source
AI summary
A system and method for providing an image are provided. The image providing method includes: transmitting, to an external device, a first video image of a first resolution, which is converted from an original video image of an original resolution; receiving, from the external device, area information about an area of interest of the first video image of the first resolution; determining, based on the area information, an area corresponding to the area of interest, of the original video image of the original resolution, wherein the determined area is smaller than the original video image of the original resolution converting a part of the original video image of the original resolution to a second video image of the first resolution, wherein the part corresponds to the determined area; and transmitting the second video image to the external device.