Ati Technologies Inc.

Biljana D Simsic

Philip L Swan

Indra Laksono

Edward George Callway

David I Glen

Antonio Asaro

David A Strasser

Paul Chow

Allen J Porter

Ivan Wong Yang

A method and apparatus for decompressing compressed data, which includes video data that has been compressed in accordance with the MPEG 2 standard, wherein the processing begins by retrieving components from a non-local memory at a rate that is independent of the rate in which the components were written into the non-local memory. The components include motion vectors and run/level data. As the components are retrieved from memory, the run/level data is used to produce representations of the uncompressed data. As the representations of the uncompressed data are generated, they are processed based on the motion vector data to recapture the uncompressed data. The uncompressed data is then stored in a frame buffer for subsequent display.

Method and apparatus for decompressing compressed data

One embodiment of a de-interlacing device has a decoder that extracts decoding motion vector data for use in de-interlacing of decompressed picture data, from an MPEG-2 type compressed data stream containing interlaced decompressed picture data made up of macroblock of data. The de-interlacing device also has a video rendering device for receiving the extracted decoding motion vector data from the decoder. The decoder has a determinator for determining whether the macroblock of data contains motion based on the decoding motion vector data and at least a subset of the block of data. The decoder generates motion vector based de-interlacing information containing information indicating whether each macroblock contains motion or no motion and if desired, a level of confidence that the referenced data is suitable for a particular method of de-interlacing. The video rendering device de-interlaces the interlaced picture data on a macroblock of data basis by applying an adaptive motion filtering algorithm to the interlaced picture data for display on the progressive display device.

Method and apparatus for de-interlacing interlaced content using motion vectors in compressed video streams

A method and apparatus for detecting differences between an image update rate and a display update rate and to provide a viable solution that produces minimal adverse visual effects is achieved by first detecting an image delineation from a stream of images. The image delineation is then used to determine the image update rate which is compared to the display update rate to produce a relationship between the two update rates. The relationship is then compared to a plurality of desired relationships to determine if it is sufficiently similar to one or more of the desired relationships. If it is, an image display pattern associated with the desired relationship is used. For example, if the relationship is sufficiently similar to the desired relationship of 1:1, then the image display pattern will be 1111 . . . In other words, the image display pattern would display each received image once. But, even though the relationship is sufficiently similar, the display update is adjusted, such that, over time, the relationship matches the desired relationship.

Method and apparatus for detecting image update rate differences

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Biljana D Simsic