1
Aggelos Katsaggelos
Taner Ozcelik, James C Brailean, Aggelos K Katsaggelos, Ozan Erdogan, Cheung Auyeung: Method and apparatus for spatially adaptive filtering for video encoding. Motorola, Northwestern University, Darleen J Stockley, June 9, 1998: US05764307 (29 worldwide citation)

The present invention provides a method (200) and an apparatus (100) for spatially adaptive filtering for video encoding. The apparatus filters a video sequence prior the encoding process. The apparatus comprises a noise variance determiner (102), a local variance determiner (104), a noise visibilit ...


2
Aggelos Katsaggelos
Mark R Banham, James C Brailean, Stephen N Levine, Aggelos K Katsaggelos, Guido M Schuster: Method, device and microprocessor for selectively compressing video frames of a motion compensated prediction-based video codec. Motorola, Northwestern University, Darleen J Stockley, June 9, 1998: US05764921 (19 worldwide citation)

A method (100, 200), device (300) and microprocessor (400) are provided for selectively compressing video frames of a motion compensated prediction-based video codec based on a predetermined set of compression techniques. An energy estimate of the current displaced frame difference, DFD, is used to ...


3
Aggelos Katsaggelos
Serhan Uslubas, Aggelos K Katsaggelos, Faisal Ishtiaq, Shih Ta Hsiang, Ehsan Maani: Digital image compression by resolution-adaptive macroblock coding. Motorola, Northwestern University, Motorola, Penny Tomko, January 6, 2011: US20110002391-A1

Disclosed is an image encoder that divides a digital image into a set of “macroblocks.” If appropriate, a macroblock is “downsampled” to a lower resolution. The lower-resolution macroblock is then encoded by applying spatial (and possibly temporal) prediction. The “residual” of the macroblock is cal ...


4
Aggelos Katsaggelos
Faisal Ishtiaq, Shih Ta Hsiang, Aggelos K Katsaggelos, Ehsan Maani, Serhan Uslubas: System and method of optimized bit extraction for scalable video coding. Motorola, Northwestern University, Motorola, Law Department, April 15, 2010: US20100091841-A1

A device for use with a frame generating portion that is arranged to receive picture data corresponding to a plurality of pictures and to generate encoded video data for transmission across a transmission channel having an available bandwidth. The frame generating portion can generate a frame for ea ...


5
James C Brailean, Taner Ozcelik, Aggelos K Katsaggelos: Method and system for estimating motion within a video sequence. Motorola, Darleen J Stockley, February 10, 1998: US05717463 (27 worldwide citation)

A method and system for estimating the motion within a video sequence provides very accurate estimates of both the displacement vector field, as well as, the boundaries of moving objects. The system comprises a preprocessor (102), a spatially adaptive pixel motion estimator (104), a motion boundary ...


6
Taner Ozcelik, James C Brailean, Aggelos K Katsaggelos: Method and apparatus for regenerating a dense motion vector field. Motorola, Darleen J Stockley, November 12, 1996: US05574663 (7 worldwide citation)

The present invention provides a method (300) and apparatus (100) for regenerating a dense motion vector field, which describes the motion between two temporally adjacent frames of a video sequence, utilizing a previous dense motion vector field. In this method, a spatial DVF and a temporal DVF are ...


7
Taner Ozcelik, James C Brailean, Aggelos K Katsaggelos: Method and apparatus for detecting occlusion. Motorola, Darleen J Stockley, March 18, 1997: US05612745 (6 worldwide citation)

The present invention provides a method and apparatus for detecting occluded areas in a video frame. A previous displacement vector field, DVF, is motion compensated (402) and used to provide an occlusion test parameter (404) which is compared to an optimal threshold (408) to detect occluded areas. ...


8
Zhu Li, Bhavan Gandhi, Aggelos K Katsaggelos: Method and apparatus for reduction of visual content. Motorola, Fitch Even Tabin & Flannery, November 8, 2005: US06963378 (5 worldwide citation)

At least one visual significance metric is determined (12) for at least some frames belonging to an original series of frames (11). Key frames are identified (13) as a function, at least in part, of the visual significance metric. Cumulative visual significance values are then determined (14) for at ...


9
Taner Ozcelik, James C Brailean, Aggelos K Katsaggelos, Stephen N Levine: Method and system for improved motion compensation. Motorola, Darleen J Stockley, July 8, 1997: US05646867 (5 worldwide citation)

The present invention provides a method (600) and system (100) for predicting a differential vector field. The method and system enable the detection and encoding of an area where motion compensating the past image frame to the current image frame, fails. Based on the DFD signal, the present inventi ...


10
Faisal Ishtiaq, Aggelos K Katsaggelos: Method and structure for scalability type selection in digital video. Motorola, February 7, 2006: US06996172 (4 worldwide citation)

A scalability type selection method and structure for hybrid SNR-temporal scalability that employs a decision mechanism capable of selecting between SNR and temporal scalability based upon desired criteria is disclosed. This method and structure utilizes models of the desired criteria such as the ex ...