Image memory storage system and method for a block oriented image processing system

摘要

A multi-channel memory system for holding video image data employs a particular form of interleaving in each channel to achieve optimum performance. Data representing luminance and chrominance components are written into the memory in respectively different channels such that the luminance information occupies one part of a memory row while the chrominance information occupies another part. The channel assignment is cycled within a memory row and is changed from one row of the memory to the next such that all luminance information in the row is contiguous and all chrominance information is contiguous yet luminance information and its corresponding chrominance information may be accessed in a single operation using all three channels. The memory is organized in three channels, each channel including two devices and each device including two banks. In addition to the interleaving of the channels, memory rows holding image data which are adjacent on the screen are stored in respectively different banks and devices such that this adjacent data may be accessed quickly.