Katherine H Cornog

6337880, Jan 8, 2002

Apr 7, 2000

09/544869

Katherine H. Cornog - Newburyport MA
James Hamilton - Redwood City CA
Oliver Morgan - Lexington MA

Avid Technology, Inc. - Tewksbury MA

H04B 166

37524001, 386 4, 386111

Random access to arbitrary images, whether frames or fields, of a video segment compressed using both interframe and intraframe techniques may be enhanced by including state information, for decoding and display, at appropriate points in the compressed bitstream to enable random access to each intraframe compressed image. The state information may be inserted during compression or by processing the bitstream of compressed data. An image index also may be generated that maps each temporal image in a decompressed output image sequence to an offset in the compressed bitstream of the data used to decode the image. The index may be created during compression or by processing the bitstream of compressed data. To access one or more samples starting with a specified point in time in a decompressed output image sequence, the index is accessed using the specified point in time to identify another sample in the decompressed output image sequence for which data is used to produce the specified sample. The identity of the other sample is used to access the index to identify a location in the compressed data for the data used to produce the specified sample.

6570624, May 27, 2003

Apr 20, 2001

09/839160

Katherine H. Cornog - Newburyport MA
Garth A. Dickie - Framingham MA
Peter J. Fasciano - Natick MA
Randy M. Fayan - Medford MA
Robert A. Gonsalves - Wellesley MA
Michael Laird - Nashua NH

Avid Technology, Inc. - Tewksbury MA

H04N 701

348446, 382276

Two images are analyzed to compute a set of motion vectors that describes motion between the first and second images. A motion vector is computed for each pixel in an image at a time between the first and second images. This set of motion vectors may be defined at any time between the first and second images, such as the midpoint. The motion vectors may be computed using any of several techniques. An example technique is based on the constant brightness constraint, also referred to as optical flow. Each vector is specified at a pixel center in an image defined at the time between the first and second images. The vectors may point to points in the first and second images that are not on pixel centers. The motion vectors are used to warp the first and second images to a point in time of an output image between the first and second images using a factor that represents the time between the first and second image at which the output image occurs. The warped images are then blended using this factor to obtain the output image at the desired point in time between the first and second images.

6584152, Jun 24, 2003

Dec 11, 2000

09/734276

Michael Sporer - Wellesley MA
Katherine H. Cornog - Newburyport MA
Peter Zawojski - Merrimack NH
James Hamilton - Redwood City CA

Avid Technology, Inc. - Tewksbury MA

H04B 166

37524001, 386111, 382309

Random access to arbitrary fields of a video segment compressed using both interframe and intraframe techniques is enhanced by adding state information to the bitstream prior to each intraframe compressed image to allow each intraframe compressed image to be randomly accessed, by generating a field index that maps each temporal field to the offset in the compressed bitstream of the data used to decode the field, and by playing back segments using two or more alternatingly used decoders. The cut density may be improved by eliminating from the bitstream applied to each decoder any data corresponding to bidirectionally compressed images that would otherwise be used by the decoder to generate fields prior to the desired field.

6665450, Dec 16, 2003

Sep 8, 2000

09/657699

Katherine H. Cornog - Newburyport MA
Garth A. Dickie - Arlington MA
Peter J. Fasciano - Natick MA
Randy M. Fayan - Medford MA

Avid Technology, Inc. - Tewksbury MA

G06K 936

382276, 382293, 382300

Two images are analyzed to compute a set of motion vectors that describes motion between the first and second images. A motion vector is computed for each pixel in an image at a time between the first and second images. This set of motion vectors may be defined at any time between the first and second images, such as the midpoint. The motion vectors may be computed using any of several techniques. An example technique is based on the constant brightness constraint, also referred to as optical flow. Each vector is specified at a pixel center in an image defined at the time between the first and second images. The vectors may point to points in the first and second images that are not on pixel centers. The motion vectors are used to warp the first and second images to a point in time of an output image between the first and second images using a factor that represents the time between the first and second image at which the output image occurs. The warped images are then blended using this factor to obtain the output image at the desired point in time between the first and second images.

6792433, Sep 14, 2004

Apr 6, 2001

09/828099

Katherine H. Cornog - Newburyport MA
Oliver Morgan - Lexington MA

Avid Technology, Inc. - Tewksbury MA

G06F 1730

7071041, 370431

By providing an index that stores information about how to access each grouping of elements in an interleaved data stream and each element within each grouping, random access to each element in the interleaved data stream can be achieved. The index may store a temporal offset for each grouping for interleaved data streams in which the order of data samples in the interleaved data stream is different from the order in which those data samples are used to present the data stream. The information that allows each element in a grouping to be accessed may include information defining the length of each element, or information describing the relative position of each element in a grouping, such as a map table. Such a map table may have an entry for each data type, wherein each entry includes an indication of information used to access a sample of the data type.

6871003, Mar 22, 2005

Mar 17, 2000

09/528786

Michael E. Phillips - Melrose MA, US
Katherine H. Cornog - Newburyport MA, US

Avid Technology, Inc. - Tewksbury MA

H04N005/93

386 55, 386 65

The invention provides an editing system for editing and combining media material into a resulting media composition. The media may be film or video based material, and also may include audio material. The video may adhere to either NTSC or PAL timing. In response to editing instructions, an Edit Decision List (EDL) is produced that specifies the material that makes up the edited composition, and the order of presentation of this material in the output composition. The EDL specifies the input clips that are taken from the source material using source timecode and similarly defines the output order again according to a new time code, the record time code. The editing system produces an extended EDL that facilitates the downstream processing (after the editing has been completed) for post production tasks requiring the need to know accurately where edit points occur.

7043058, May 9, 2006

Apr 20, 2001

09/838868

Katherine H. Cornog - Newburyport MA, US
Randy M. Fayan - Medford MA, US
Garth Dickie - Arlington MA, US

Avid Technology, Inc. - Tewksbury MA

G06K 9/00

382107, 382173, 348154

Visibie artifacts in images created using image processing based on motion vector maps may be reduced by providing one or more mechanisms for correcting the vector map. In general, the set of motion vectors is changed by selecting one or more portions of the image. The vectors corresponding to the selected one or more portions are modified. Various image processing operations, such as motion compensated interpolation, may be performed using the changed set of motion vectors.

7103231, Sep 5, 2006

Nov 3, 2003

10/700285

Katherine H. Cornog - Newburyport MA, US
Garth A. Dickie - Arlington MA, US
Peter J. Fasciano - Natick MA, US
Randy M. Fayan - Medford MA, US
Robert A. Gonsalves - Wellesley MA, US

Avid Technology, Inc. - Tewksbury MA

G06K 9/36

382276, 382293, 382300

Two images are analyzed to compute a set of motion vectors that describes motion between the first and second images. A motion vector is computed for each pixel in an image at a time between the first and second images. This set of motion vectors may be defined at any time between the first and second images, such as the midpoint. The motion vectors may be computed using any of several techniques. An example technique is based on the constant brightness constraint, also referred to as optical flow. Each vector is specified at a pixel center in an image defined at the time between the first and second images. The vectors may point to points in the first and second images that are not on pixel centers. The motion vectors are used to warp the first and second images to a point in time of an output image between the first and second images using a factor that represents the time between the first and second image at which the output image occurs. The warped images are then blended using this factor to obtain the output image at the desired point in time between the first and second images.