Video Bitrate Adjustment via Picture Quality Feedback
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Solution Overview
Problem
Current video bitrate adjustment methods primarily focus on network bandwidth adaptation without considering picture quality, leading to suboptimal video stream quality of experience due to the nonlinear relationship between bitrate and perceived picture quality.
Innovation Solution
A method that analyzes the current picture quality of a video stream during the push-stream process and adjusts the target bitrate based on a predetermined picture quality evaluation standard and the change trend of picture quality relative to historical data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bandwidth estimation algorithm and bit-table are used to determine target bitrate, then network bandwidth adaptation is achieved, but picture quality is not adaptively considered leading to suboptimal video quality of experience
Solution Approach 1:
The patent implements a feedback mechanism by analyzing actual picture quality metrics (PSNR, SSIM, VMAF) of the encoded video stream and using this information to adjust the target bitrate dynamically. The system compares actual picture quality against reference quality and modifies bitrate accordingly, creating a closed-loop control system that adapts to actual encoding performance rather than relying solely on pre-defined bit-tables.
Solution Approach 2:
The patent changes the parameter being optimized from purely network-bandwidth-based bitrate selection to a composite approach that incorporates picture quality metrics. By introducing quality-aware bitrate adjustment that considers PSNR, SSIM, and VMAF parameters, the system transforms the bitrate determination process from a static lookup table approach to a dynamic parameter-optimized approach that balances quality and bandwidth.
2Manufacturing precision
If bitrate is increased to improve picture quality, then video quality of experience improves, but bandwidth cost increases
Solution Approach 1:
The patent optimizes the bitrate parameter by changing it dynamically based on actual picture quality measurements rather than using fixed high-bitrate allocations. The system adjusts bitrate parameters in real-time based on quality metrics and network conditions, achieving quality improvement only when necessary and at the minimal bandwidth cost required.
Solution Approach 2:
The patent applies partial action by increasing bitrate only to the extent necessary to achieve the desired picture quality threshold, rather than continuously maximizing bitrate. The quality-aware adjustment mechanism applies bitrate increases selectively based on actual quality deficits, avoiding excessive bandwidth consumption while still improving quality where needed.
Data Source
AI summary
Embodiment of the disclosure disclose a method, apparatus, device, storage medium and product for video bitrate adjustment, and the method includes: analyzing and determining a current picture quality evaluation result of a target video stream in a current bitrate regulation period based on a video frame; and determining a target bitrate based on a predetermined target picture quality evaluation standard associated with a bitrate and/or a picture quality change trend of the current picture quality evaluation result relative to a historical picture quality evaluation result in a historical bitrate regulation period.