Dynamic Video Encoding Scheme Selection
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Solution Overview
Problem
Mobile devices face challenges in maintaining a consistent high frame rate for video transmissions due to computing capability constraints and resource spikes, leading to video delay, jerky video, and audio-video desynchronization.
Innovation Solution
A method for dynamically selecting a video encoding scheme based on real-time system resource utilization by comparing the actual encoding time of a video frame to pre-defined estimated processing times, adjusting the encoding scheme to optimize processing time for subsequent frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a high-quality video encoding scheme is used, then video quality is improved, but processing time increases and frame rate consistency deteriorates
Solution Approach 1:
The patent implements dynamic encoding scheme selection that adjusts the encoding quality parameters in real-time based on current system resource availability. The encoder transitions between different encoding schemes (e.g., high quality, medium quality, low quality) depending on processor utilization metrics, allowing the system to optimize between video quality and processing speed dynamically rather than using a fixed encoding scheme
Solution Approach 2:
The patent changes encoding parameters such as quantization step size, transformation block size, and motion search range based on system resource conditions. When processor utilization is high, parameters are adjusted to reduce complexity and processing time; when resources are abundant, parameters are optimized for higher video quality
2Manufacturing precision
If a complex video encoding scheme is used, then video quality is improved, but frame rate consistency deteriorates due to processing time variation
Solution Approach 1:
The patent incorporates a feedback mechanism that monitors processing time and system resource utilization for each encoded frame. Based on this feedback, the system adjusts the encoding scheme parameters for subsequent frames to maintain consistent frame rates. If a frame takes longer than expected to process, the next frame's encoding parameters are adjusted to compensate and maintain timing consistency
Solution Approach 2:
The encoding scheme is made dynamic by continuously adjusting parameters based on real-time performance measurements. The system adapts encoding complexity on a per-frame basis to ensure that each frame can be processed within the target time budget, thereby maintaining stable and consistent frame rates throughout video transmission
3Power
If system resource utilization increases, then more processing power is available, but video encoding performance deteriorates due to shared resources
Solution Approach 1:
The patent performs preliminary assessment of system resource utilization before encoding each video frame. By checking processor availability and resource conditions in advance, the system can pre-select appropriate encoding parameters that will complete within the required time window, preventing performance deterioration even when overall system utilization is high
Data Source
AI summary
Disclosed is a method, a system and a computer readable medium for encoding a video stream. The method includes determining a first time period based on a first estimated processing time algorithm, determining a second time period based on a second estimated processing time algorithm, comparing an encoding time period of the video frame to the first time period and the second period, and changing an encoding scheme for encoding a subsequent video frame if two times the encoding time of the video frame is one of less than the first time period and greater than the second time period.