Video Frame Fault Detection Using MISR Signature Comparison
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Solution Overview
Problem
Current fault detection methods in video processing systems introduce latency, increase memory bandwidth, and enhance power consumption, failing to effectively detect freeze frame and data mismatch faults in video sequences.
Innovation Solution
A fault detection circuit utilizing a multiple input signature register (MISR) with a linear feedback shift register (LFSR) and a multiple signature storage buffer (MSSB) compares current and reference frame signatures to identify faults, minimizing software intervention and reducing latency, bandwidth, and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current fault detection methods are used, then fault detection capability is provided, but latency increases
Solution Approach 1:
The patent pre-calculates and stores signature values for expected video frame regions (such as overlay regions) before the actual fault detection occurs. When a frame is processed, the system compares the actual signature against these pre-computed reference signatures, eliminating the need for complex real-time analysis and significantly reducing detection latency.
Solution Approach 2:
The patent extracts only the critical signature portions of video frames (specifically overlay regions) for fault detection rather than processing entire frames. This extraction approach focuses computational resources on the most diagnostically valuable data, reducing processing time and latency while maintaining effective fault detection capability.
2Reliability
If current fault detection methods are used, then fault detection capability is provided, but memory bandwidth increases
Solution Approach 1:
The system extracts only signature values from specific overlay regions of video frames rather than processing or storing entire frame data. This selective extraction dramatically reduces the volume of data that must be transferred through memory bandwidth, while the extracted signatures retain sufficient information for effective fault detection.
Solution Approach 2:
The patent applies fault detection specifically to localized overlay regions rather than uniformly processing entire video frames. By concentrating detection efforts on regions where faults are most likely to occur (overlay areas), the system reduces overall memory bandwidth requirements while maintaining or improving fault detection effectiveness in critical areas.
3Reliability
If current fault detection methods are used, then fault detection capability is provided, but power consumption increases
Solution Approach 1:
The patent extracts only essential signature data from video frames for fault detection purposes, avoiding the energy-intensive processing of complete frame data. This extraction strategy maintains fault detection capability while significantly reducing computational workload and associated power consumption.
Solution Approach 2:
The system performs partial fault detection by analyzing only signature portions of frames rather than conducting exhaustive analysis of entire frames. This partial action approach provides sufficient fault detection capability for critical applications while consuming less power than complete frame analysis would require.
Data Source
AI summary
A fault detection circuit for detecting faults in a video sequence includes a multiple input signature register (MISR) with a linear feedback shift register (LFSR) that receives pixel data for pixels in a frame region for video frames of a video sequence and receives a read signal to read the pixel data and shift the MISR; a multiple signature storage buffer (MSSB) that stores frame signatures; and a signature comparator that compares current and reference frame signatures to determine if a fault condition exists in the video sequence. The MISR holds a frame signature for the frame region of the video frame while receiving a frame end signal. The MSSB stores a current frame signature held by the MISR after receiving the frame end signal. The MSSB also stores a reference frame signature. A display processing circuit includes the fault detection circuit. An integrated circuit includes the display processing circuit.