Single Frame Memory for Video Signal Y/C Separation and Deinterlacing
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Solution Overview
Problem
Existing video signal processing apparatuses require two frame memories for interlaced scanning video signal processing, increasing costs and processing time due to the need for separate memories for Y/C separation and deinterlacing operations.
Innovation Solution
A video signal processing apparatus utilizing a single frame memory for both Y/C separation and deinterlacing operations, with a Y/C separator and deinterlacer circuit that processes interlaced video signals to produce sequential video signals, reducing the need for multiple memory accesses and lowering fabrication costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two frame memories are used for Y/C separation and deinterlacing operations, then processing accuracy is improved, but device complexity and fabrication cost increase
Solution Approach 1:
The patent merges the Y/C separation function and deinterlacing function into a single frame memory structure. The frame memory is designed to store both Y (luminance) and C (chrominance) signals simultaneously, eliminating the need for separate frame memories for each function. This integration reduces device complexity while maintaining processing accuracy through coordinated access to the unified memory structure.
Solution Approach 2:
The single frame memory is designed with multi-functionality to serve both Y/C separation and deinterlacing operations. The memory structure includes multiple access ports and control logic that enable it to perform diverse functions: storing interlaced video signals, separating Y and C components, and deinterlacing fields. This universal design reduces the overall number of memory components needed in the system.
2Productivity
If two frame memories are used for Y/C separation and deinterlacing operations, then processing capability is improved, but processing time increases
Solution Approach 1:
By combining Y/C separation and deinterlacing operations within a single frame memory, the patent eliminates sequential memory access steps. The integrated memory structure allows simultaneous or overlapping operations where Y and C signal processing can occur in parallel, reducing the total processing time compared to using separate frame memories for each function.
Solution Approach 2:
The frame memory is designed to pre-store both Y and C signals in a coordinated manner during the Y/C separation phase, so that during the deinterlacing phase, the data is already positioned and ready for rapid access. This preliminary organization of data within the unified memory structure eliminates the need for additional data transfer operations between separate memories, thereby reducing processing time.
3Adaptability or versatility
If two frame memories are used for Y/C separation and deinterlacing operations, then functional separation is improved, but fabrication cost increases
Solution Approach 1:
The patent integrates multiple functional separations (Y/C separation and deinterlacing) into a single frame memory fabrication. Instead of manufacturing and assembling separate frame memories for each function, the unified memory structure is created in a single fabrication process, reducing manufacturing complexity and fabrication cost while maintaining the necessary functional separations through internal address and control logic.
Data Source
AI summary
A video signal processing apparatus may include a frame memory and a separator and deinterlacer circuit. The frame memory may store an interlaced video signal. The separator and deinterlacer circuit may execute operations of separating and deinterlacing the interlaced video signal stored in the frame memory. The apparatus may output a sequential video signal. A data processing system may include the video signal processing apparatus. A method for processing video signals may include storing an interlaced video signal in a frame memory and executing operations of separating and deinterlacing the interlaced video signal stored in the frame memory. The method may also include outputting a sequential video signal.