UNDERSTANDING PROPERTIES OF UNCHANGING BLOCKS Alice Yu Gates 100, 12:15 Wednesday, April 21, 1999 Zero-block prediction has been shown to be an effective way to reduce complexity in block-based, motion-compensated DCT coders, such as H.263. A challenging question is how to determining accurate predictors for these blocks, while simultaneously being simple to compute. This talk is work-in-progress and specifially looks at the properties of blocks which show no change between frames. We will show that an analysis of unchanging blocks adds insight into the greater problem of zero-block detection.