Table of Contents | 
Abstract | Overview
Table of Contents | Abstract | Overview
This document details the development of a diagnostic instrumentation tool for the Dirac video codec. Dirac has been released open source and therefore it is important for current and future developers to easily see and interpret decisions made by the encoder for diagnostic purposes. In other words, this tool allows developers to see metadata associated with an encoded picture sequence created during the encoding process.
Information is overlaid on top of the encoded sequence luminance (Y) layer in order for its relationship with the picture sequence to be easily identified. Currently, data associated with motion estimation and compensation is available as instrumentation. Figure 1 shows an example output of Sum of Absolute Difference (SAD) informatio For more information on SAD block values see Overlay details: SAD or refer to the algorithm documentation.
Figure 1. Example of diagnostic output showing SAD block values