Dynamic Bit Rate Control for Video Quality
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Solution Overview
Problem
Conventional video conversion devices lack the ability to directly control video quality by adjusting the output bit rate in response to varying frame detail, leading to fluctuations in distortion and quality, and often result in unnecessary resource usage due to constant bit rate constraints.
Innovation Solution
A system that includes a video conversion module coupled with a bit rate controller, which generates a quality score by comparing input and output comparison blocks and adjusts the output bit rate based on a target quality level, allowing for real-time adjustments to maintain desired video quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the bit rate is reduced to decrease system requirements, then processing power and network bandwidth requirements are reduced, but video quality deteriorates due to increased distortion
Solution Approach 1:
The patent implements dynamic bit rate adjustment by continuously monitoring video quality metrics and adapting the bit rate in real-time. The system transitions from static bit rate allocation to dynamic control, where the bit rate is adjusted based on actual video content complexity and quality measurements, resolving the contradiction between reducing processing requirements and maintaining video quality.
Solution Approach 2:
The system changes the bit rate parameter dynamically based on video quality feedback. By monitoring quality metrics and adjusting the bit rate parameter in response to measured quality levels, the system optimizes the balance between processing requirements and video quality output.
2Quantity of substance
If the bit rate is reduced to decrease network bandwidth requirements, then network bandwidth consumption is reduced, but video quality deteriorates due to increased distortion
Solution Approach 1:
The patent implements dynamic bit rate adjustment by continuously monitoring video quality metrics and adapting the bit rate in real-time. The system transitions from static bit rate allocation to dynamic control, where the bit rate is adjusted based on actual video content complexity and quality measurements, resolving the contradiction between reducing network bandwidth requirements and maintaining video quality.
Solution Approach 2:
The system changes the bit rate parameter dynamically based on video quality feedback. By monitoring quality metrics and adjusting the bit rate parameter in response to measured quality levels, the system optimizes the balance between network bandwidth consumption and video quality output.
3Quantity of substance
If the bit rate is reduced to decrease storage capacity requirements, then storage capacity requirements are reduced, but video quality deteriorates due to increased distortion
Solution Approach 1:
The patent implements dynamic bit rate adjustment by continuously monitoring video quality metrics and adapting the bit rate in real-time. The system transitions from static bit rate allocation to dynamic control, where the bit rate is adjusted based on actual video content complexity and quality measurements, resolving the contradiction between reducing storage capacity requirements and maintaining video quality.
Solution Approach 2:
The system changes the bit rate parameter dynamically based on video quality feedback. By monitoring quality metrics and adjusting the bit rate parameter in response to measured quality levels, the system optimizes the balance between storage capacity requirements and video quality output.
4Stability of the object's composition
If a constant bit rate is imposed to meet system constraints, then system constraints are satisfied, but video quality fluctuates and cannot be directly controlled
Solution Approach 1:
The patent implements a feedback control mechanism where video quality is measured and used to adjust the bit rate. The system continuously monitors quality metrics, compares them against target quality levels, and adjusts the bit rate accordingly, enabling direct quality control while maintaining bit rate stability through controlled adjustment rather than constant rate imposition.
Solution Approach 2:
The system transitions from static constant bit rate to dynamic bit rate adjustment controlled by quality feedback, allowing the bit rate to adapt while maintaining overall system stability through regulated changes based on measured quality levels.
5Stability of the object's composition
If quantization is increased to maintain constant bit rate, then bit rate stability is maintained, but distortion increases and video quality deteriorates
Solution Approach 1:
The patent implements a feedback control mechanism where video quality is measured and used to adjust the bit rate. By monitoring quality metrics and adjusting bit rate in response to measured quality, the system maintains bit rate stability through controlled adjustment while preventing excessive distortion that would result from fixed quantization increases.
Solution Approach 2:
The system dynamically adjusts the bit rate parameter based on quality feedback rather than relying on fixed quantization settings, allowing optimization of the balance between bit rate stability and distortion control according to actual video content and quality measurements.
Data Source
AI summary
A system and method includes adjusting bit rate based on measured quality in a video conversion module. The video conversion module may be, for example, an encoder or a transcoder. In one embodiment, the video conversion module receives an input stream in a first format and converts the input stream to an output stream in a second format. The video conversion module is coupled to a bit rate controller that controls the bit rate of the output stream. A bit rate controller compares the output quality of the output stream to a target quality, and adjusts the output bit rate responsive to the comparison having a difference greater than a predetermined value.