Transcoding Frame-Based Video to Frame-Free via Sigma-Delta Modulation
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Solution Overview
Problem
Traditional frame-based video systems suffer from limitations such as aliasing errors, blur, and inability to accurately represent motion, especially at high speeds, due to their reliance on discrete frames.
Innovation Solution
The development of methods and systems for transcoding frame-based video into frame-free video and vice versa, utilizing motion adaptive frame interpolation and discrete time sigma delta modulation, to enhance temporal bandwidth and improve video representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frame-based video is used, then compatibility with traditional displays is maintained, but motion representation accuracy and temporal bandwidth are limited
Solution Approach 1:
The patent introduces a transcoding system as an intermediary between frame-based video sources and frame-free video displays. This mediator converts traditional frame-based video into frame-free video format, enabling high temporal bandwidth applications while maintaining compatibility with existing displays through the conversion process
Solution Approach 2:
The system changes the fundamental parameter of video representation from discrete frames to continuous time signaling. By transforming the temporal structure from frame-based to frame-free, the system achieves higher temporal bandwidth and improved motion representation while adapting to both traditional and next-generation display requirements
2Measurement precision
If frame rate is increased to reduce aliasing errors, then motion representation improves, but system complexity and processing requirements increase
Solution Approach 1:
The patent replaces the mechanical frame-based sampling system with a continuous time signaling system. Instead of using high frame rates to reduce aliasing, the system uses continuous time domain representation with sigma-delta modulation, substituting the mechanical frame structure with an analog-like continuous signal approach
Solution Approach 2:
The system uses periodic sigma-delta modulation at a high frequency to convert the continuous video signal into a bit-plane stream. This periodic action at the modulation frequency allows the system to achieve high temporal bandwidth while managing complexity through structured periodic processing rather than requiring proportionally higher frame rates
3Ease of manufacture
If frame-based video is used, then processing is simplified, but temporal bandwidth is limited and motion blur occurs
Solution Approach 1:
The patent segments the video signal into separate bit-planes through sigma-delta modulation. This segmentation allows the system to process temporal information at a finer granularity level, enabling higher temporal bandwidth by handling the segmented bit-planes independently at the modulation frequency rather than being constrained by frame rate
4Measurement precision
If shutter is opened longer to capture more light, then image quality improves, but aliasing errors increase due to integration over extended period
Solution Approach 1:
The system eliminates the shutter opening/closing cycle entirely by using continuous time signaling. Instead of integrating light over discrete shutter intervals, the system continuously captures and modulates the video signal in real-time, maintaining continuous useful action without the periodic interruptions that cause aliasing errors
Data Source
AI summary
The present invention encompasses methods and systems of transcoding frame-based video to frame free video is provided. The method comprises receiving a frame-based video stream, upconverting the received frame-based video stream to produce an upconverted frame-based video stream at a higher frame rate than the received frame-based video stream, and modulating the upconverted frame-based video stream using discrete time sigma delta modulation to produce a frame free video stream. In addition, complimentary methods and systems are disclosed for transcoding frame free video to frame-based video.