Video Encoding Quantization Parameter Adjustment via Motion Sensing
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Solution Overview
Problem
Existing video coding techniques face challenges in selecting an optimal quantization parameter (QP) due to hardware limitations, which affects video compression bit rate and quality, especially when estimating frame motion requires looking ahead to multiple future or prior frames.
Innovation Solution
The use of motion-sensing circuitry, such as accelerometers and location-sensing circuitry, to determine the quantization parameter for video encoding based on detected physical motion of the electronic device, allowing for real-time adjustment of QP without needing to examine large numbers of future or prior frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the encoder examines multiple future or prior frames to predict motion and select QP, then the video encoding quality is improved, but the device complexity and processing time increase due to hardware limitations
Solution Approach 1:
The patent introduces motion-sensing circuitry as an intermediary device that physically senses motion of the electronic device and converts it into motion information. This intermediary provides motion data directly to the encoder without requiring the encoder to examine multiple video frames, thereby improving encoding quality while reducing device complexity and processing burden
Solution Approach 2:
The patent replaces the mechanical/frame-based motion analysis system with a sensing-based system. Instead of using the encoder to mechanically examine multiple frames to detect motion, the system uses dedicated motion-sensing circuitry to detect physical motion and provide this information directly to the encoder, simplifying the overall system architecture
2Measurement precision
If the encoder looks ahead to multiple frames to select proper QP, then the quantization accuracy is improved, but the latency increases due to buffering requirements
Solution Approach 1:
The motion-sensing circuitry continuously monitors and detects physical motion of the electronic device in advance, providing motion information to the encoder before encoding is needed. This preliminary detection eliminates the need to buffer and examine multiple frames to determine motion, reducing encoding latency while maintaining accurate QP selection
Solution Approach 2:
The motion-sensing circuitry autonomously detects and provides motion information without requiring the encoder to perform frame analysis. The sensing system serves itself by directly outputting motion data that the encoder can use immediately, eliminating the time-consuming frame examination process
3Quantity of substance
If a larger QP is used for compression, then the bit rate is reduced, but the image quality deteriorates when the source frame is complex
Solution Approach 1:
The patent dynamically adjusts the QP parameter based on real-time motion information from the motion-sensing circuitry. When motion is detected indicating complex scenes, the system automatically selects smaller QP values to maintain image quality. When no motion is detected indicating simple scenes, the system uses larger QP values to reduce bit rate, achieving adaptive optimization of both quality and compression
Data Source
AI summary
Systems, methods, and devices for encoding video data are provided. For example, an electronic device for obtaining and encoding video may include image capture circuitry, motion-sensing circuitry, and data processing circuitry. The image capture circuitry may capture an uncompressed video frame, and the motion-sensing circuitry may detect physical motion of the electronic device. The data processing circuitry may encode the uncompressed video frame based at least in part on a quantization parameter, which the data processing circuitry may determine based at least in part on whether the motion-sensing circuitry has detected physical motion of the electronic device.