Cache Memory Pixel Prefetching for Image Conversion Latency

The patent applies preliminary action by determining and storing in the cache memory the specific unconverted pixels that will be needed for calculating converted pixel values, rather than storing all unconverted pixels. The coordinate calculation unit calculates which unconverted pixels are required in advance, and the cache control unit loads only those specific pixels into the cache memory before the conversion process begins. This ensures that the cache memory contains exactly the pixels that will be used, improving both access speed and usage efficiency.

The patent applies preliminary action by predicting and loading the required unconverted pixels into the cache memory before they are needed for conversion. The coordinate calculation unit determines which unconverted pixels will be needed based on the conversion parameters, and the cache control unit fetches these pixels from external memory in advance and stores them in the cache memory. This eliminates or reduces the need for frequent fetch requests during the actual conversion process, thereby reducing access latency while ensuring all necessary pixel data is available.

The patent applies the extraction principle by selectively extracting only the necessary unconverted pixels from the entire unconverted image and loading them into the cache memory. Instead of reading the whole image, the coordinate calculation unit identifies which specific pixels are needed for the conversion operation, and the cache control unit extracts and loads only those pixels. This reduces the amount of data transferred between external memory and cache memory, decreasing memory bandwidth consumption and processing time while ensuring all required pixels are available for conversion.