ISO/IEC DIS 10918-1 begins with a digital image in the format Y, CB, CR (such as defined in CCIR 601-2) and provides several levels of compression. Predictive coding and transforms are employed, with the higher compression ratios selectively recognising the decrease in human visual acuity with increasing spatial frequencies. It is optimised for about 15:1 compression. As increased data storage and increased processing capabilities are becoming available, there is exploration of adapting JPEG-1 for application to successive frames in real time; i.e., full-motion JPEG.