Abstract: Various embodiments relating to identifying an acoustic signature of an audio content item are provided. In one embodiment, an audio subsample of a test audio content item may be compared with corresponding audio subsamples of each of a plurality of catalog audio content items. If the audio subsample of the test audio content item matches the corresponding audio samples of two or more catalog audio content items, those catalog audio content items may be selected as candidate audio content items. A complete audio sample of the test audio content item may be compared to corresponding complete audio samples of each of the candidate audio content items. One of the candidate audio content items may be selected as a matching audio content item.

Abstract: A technique for rendering non-linear BRDFs that are stable in both the temporal and spatial domains, without serious interruption to the content creation pipeline used in most games, is provided. Non-linear content is linearized by rendering in texture space at a fixed resolution. A MIP-map chain is calculated from this texture. The complete MIP-map chain is used for rendering on a display device. Low resolution reflectance parameters are used to approximate the highest resolution reflectance parameters as the object becomes smaller on the display device. The low resolution reflectance parameters are calculated using non linear fitting techniques.