Quality Prediction Apparatus for Adaptive Bitrate Video Streaming
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Solution Overview
Problem
In Adaptive Bitrate (ABR) video streaming, switching of streaming servers leads to delayed throughput and buffer occupation measurements, resulting in potential reproduction interruptions and inconsistent quality of experience due to the time required to select a proper streaming bit rate.
Innovation Solution
A quality prediction apparatus that acquires and compares access network and core network throughputs to predict the smaller throughput value, enabling efficient selection of the appropriate streaming bit rate without requiring actual measurement after server switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If throughput and buffer occupation amount are measured after server switching in ABR scheme, then measurement accuracy is improved, but response time increases causing reproduction interruptions
Solution Approach 1:
The patent performs preliminary measurement of throughput and buffer occupation amount before server switching occurs. By obtaining these measurements in advance, the system can predict the appropriate streaming bit rate without waiting for post-switching measurements, thereby reducing response time and preventing reproduction interruptions while maintaining measurement accuracy.
2Manufacturing precision
If high streaming bit rate is selected in low throughput environment, then image quality is improved, but reproduction interruption occurs due to insufficient data arrival
Solution Approach 1:
The patent implements a feedback mechanism where the predicted throughput and buffer occupation amount are continuously monitored and used to dynamically adjust the streaming bit rate selection. When throughput is low, the system feedback-indicates to select lower bit rates to prevent reproduction interruptions, while allowing higher bit rates when throughput is sufficient, thus balancing image quality and reproduction continuity.
3Reliability
If low streaming bit rate is continuously selected in high throughput environment, then reproduction interruption is prevented, but quality of experience does not increase
Solution Approach 1:
The patent employs dynamic bit rate selection that adapts to changing network conditions. Instead of continuously selecting low bit rates, the system dynamically adjusts the streaming bit rate based on real-time throughput predictions and buffer status. When throughput increases, the system automatically selects higher bit rates to improve quality of experience, while maintaining reproduction continuity through continuous monitoring and adaptation.
Data Source
AI summary
A quality prediction apparatus includes a first acquisition unit acquiring a first throughput for an access network of a terminal from the terminal, the terminal acquiring video data in a divided state from a plurality of video streaming servers, a second acquisition unit acquiring a second throughput for a core network to which the plurality of video streaming servers connect, the terminal being to acquire the video data from one of the video streaming servers, and a prediction unit selecting smaller one of the first throughput and the second throughput as a prediction value of a throughput for the video data to be acquired, and therefore, an efficient prediction of the throughput for the video data streaming can be enabled.