The MPEG LA January 1, 2006 MPEG-4 Visual Patent List lists patent 6,134,269: Fixed or adaptive deinterleaved transform coding for image coding and intra coding of video.
The inventors are from AT&T and Lehigh University (Competitive Technologies acted as Lehigh's agent and submitted the patent to the pool). So it looks like AT&T might have at least one patent in the MPEG LA pool (just through a related entity).
some other potential AT&T patents:
4,999,705 Three dimensional motion compensated video coding 5,227,878 Adaptive coding and decoding of frames and fields of video 5,253,056 Spatial/frequency hybrid video coding facilitating the derivatives of variable-resolution images 5,270,813 Spatially scalable video coding facilitating the derivation of variable-resolution images 5,500,678 Optimized scanning of transform coefficients in video coding
Some of these are prior to MPEG-4, but you can follow the "Referenced By" link on the individual uspto patent pages to see other later patents.
I have seen AT&T patents assigned to:
AT&T Corp AT & T Corp AT&T Bell Laboratories (old, but still valid patents) Bell Telephone Laboratories (patents mostly? expired)
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The MPEG LA January 1, 2006 MPEG-4 Visual Patent List lists patent
6,134,269: Fixed or adaptive deinterleaved transform coding for image coding and intra coding of video.
The inventors are from AT&T and Lehigh University (Competitive Technologies acted as Lehigh's agent and submitted the patent to the pool). So it looks like AT&T might have at least one patent in the MPEG LA pool (just through a related entity).
some other potential AT&T patents:
4,999,705 Three dimensional motion compensated video coding
5,227,878 Adaptive coding and decoding of frames and fields of video
5,253,056 Spatial/frequency hybrid video coding facilitating the derivatives of variable-resolution images
5,270,813 Spatially scalable video coding facilitating the derivation of variable-resolution images
5,500,678 Optimized scanning of transform coefficients in video coding
Some of these are prior to MPEG-4, but you can follow the "Referenced By" link on the individual uspto patent pages to see other later patents.
I have seen AT&T patents assigned to:
AT&T Corp
AT & T Corp
AT&T Bell Laboratories (old, but still valid patents)
Bell Telephone Laboratories (patents mostly? expired)