Video Call Quality Measurement Using Original Frame Reference
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Solution Overview
Problem
Current methods for measuring the quality of video call services are inadequate for real-time bidirectional services, as existing standards and research are more suited for unidirectional services like IPTV or streaming video, making it difficult to directly apply quality measurement techniques to video call services.
Innovation Solution
A method and system that replace real-time video frames from a camera with original video frames during a video call, allowing for quality analysis at the receiving terminal using full-reference and no-reference methods based on original frames and timestamps, enabling the generation of a quality index for the video call service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If real-time video frames from camera are used for video call, then service quality is improved, but quality measurement accuracy deteriorates
Solution Approach 1:
The patent creates a copy of the original video content and transmits it alongside or instead of real-time camera frames. This copy serves as a reference for quality measurement, allowing the system to compare transmitted video against the known original content to accurately assess transmission quality without relying on the variable real-time camera input.
2Measurement precision
If quality measurement is performed using both FR and NR methods, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the quality measurement process into two separate methodological paths: Full-Reference (FR) measurement that compares transmitted video with the original video copy, and No-Reference (NR) measurement that evaluates quality without requiring the original. This segmentation allows each method to be implemented independently and combined for comprehensive quality assessment.
Solution Approach 2:
The system design allows the same video transmission infrastructure to support both FR and NR quality measurement approaches. The original video copy serves multiple purposes: as a reference for FR measurement and as a basis for generating test content that can be evaluated through NR methods, making the system multi-functional without proportionally increasing complexity.
3Adaptability or versatility
If original video is replaced with real-time camera frames, then adaptability is improved, but quality control deteriorates
Solution Approach 1:
The patent performs preliminary encoding and preparation of the original video content before transmission. By pre-processing the video and creating a reference copy in advance, the system establishes a baseline for quality control that can be used to monitor and maintain consistent quality levels during actual video call operations, even when adapting to different real-time conditions.
Data Source
AI summary
Provided is a method of measuring quality of a video call between a transmitting terminal including processing circuitry and a receiving terminal, the method including processing, by the processing circuitry, original frames included in an original video based on a video call service; replacing, by the processing circuitry, real-time video frames acquired from a camera for a video call with a receiving terminal with at least a portion of the original frames; and transmitting, by the processing circuitry, the portion of the original frames to the receiving terminal as frames for the video call with the receiving terminal through the video call service.