Patent application number | Description | Published |
20080285651 | SPATIO-TEMPORAL BOUNDARY MATCHING ALGORITHM FOR TEMPORAL ERROR CONCEALMENT - A system and methodology for concealing an error in a video signal is provided. In accordance with one aspect of the present invention, the system and methodology employ a Spatio-Temporal Boundary Matching Algorithm, which utilizes a distortion function that takes into account both the spatial and temporal smoothness properties of a video sequence. Further, the methodology for concealing an error in a video signal comprises receiving a video signal having an erroneous frame, creating a candidate set of motion vectors, selecting a motion vector from the candidate set of motion vectors that best keeps temporal and spatial continuity through the erroneous frame, and reconstructing the erroneous frame using the selected motion vector. | 11-20-2008 |
20080285656 | THREE-LOOP TEMPORAL INTERPOLATION FOR ERROR CONCEALMENT OF MULTIPLE DESCRIPTION CODING - Improved systems and methods for error concealment of multiple description coding (MDC) encoded streams are provided based on a three loop interpolation of lost frames. Error concealment of the present invention can be combined with the error resilience provided by MDC to reconstruct lost frames, such that the propagated error to the following frames is reduced. | 11-20-2008 |
20080285790 | GENERALIZED LOSSLESS DATA HIDING USING MULTIPLE PREDICTORS - A system and methodology for encoding or decoding hidden data, such as a digital watermark, in visual raster media is provided. The lossless data hiding methodology uses multiple predictors to choose an embedding location to be either a low variance region or a high variance region. Bijective mirror mapping is used to encode hidden data at an embedding location and bijective pixel value shifting is performed to ensure reversibility back to the original image without additional information. The system and methodology can be used either in the spatial domain or the wavelet domain. The Peak Signal to Noise Ratio and the payload capacity are relatively high with the methodology. | 11-20-2008 |
20090003646 | LOSSLESS VISIBLE WATERMARKING - Systems and methodologies for lossless visible watermarking of images are provided herein. The provided systems and methodologies can utilize a Pixel Value Mapping Algorithm (PVMA), wherein a watermark can be embedded into an image by transforming respective intensities of areas of the image corresponding to the watermark using a bijective mapping function. Additionally and/or alternatively, a Pixel Position Shift Algorithm (PPSA) can be used to embed a watermark into an image by shifting the position of pixels in the image corresponding to the watermark over a specified shift distance. Further, provided systems and methodologies can facilitate enhanced watermarking security by embedding a visible watermark into an image based on a secret key. | 01-01-2009 |
20090010336 | MOTION ESTIMATION OPTIMIZATIONS FOR AUDIO/VIDEO COMPRESSION PROCESSES - Motion estimation (ME) optimizations are provided for video encoding and compression processes that efficiently share data processing between host and graphics processing models. The optimizations take into account block level dependencies introduced by a corresponding encoding model, such as dependencies introduced by H.264/AVC among adjacent blocks. Arithmetic intensity of the graphics processing is adjustable to the underlying graphics hardware for further optimization, resulting in improved, real-time encoding of video data. | 01-08-2009 |
20090010483 | BLOCK-BASED LOSSLESS DATA HIDING IN THE DELTA DOMAIN - A system and methodology for encoding or decoding hidden data, such as a digital watermark, in raster media is provided in delta domain, a domain that creates a high-pass version of the raster media. Hidden data, such as a watermark, can be embedded in the general smooth region (low variance region) while a strong edge is preserved. A Mean-Square Error (MSE) reduction can be obtained by embedding the watermark in the delta domain. Using checkerboard-pattern watermark sequences and the delta domain, at least half of the total pixels in the image remain unchanged after watermark embedding. In order to recover the hidden data, some side information can be conveyed, in-band or out-of-band, to a decoder, such as various parameters used when performing the method. If protection from attacks, such as a JPEG encoding attack is desired, a location map can be provided to assist with hidden data recovery. | 01-08-2009 |
20130251028 | VIDEO ENCODING AND DECODING WITH CHANNEL PREDICTION AND ERROR CORRECTION CAPABILITY - Data encoding and/or decoding techniques are applied in a codec system. Pixel parameters and error thresholds can be determined. A prediction mode can be determined. Further, a prediction mode can predict values of an encoded and/or decoded media item. In one aspect, compositions of media items can determine prediction modes. | 09-26-2013 |
20150026747 | STREAM-SWITCHING IN A CONTENT DISTRIBUTION SYSTEM - Stream-switching techniques are applied in a content delivery system. A merge frame is generated as a function of bit-rates, distortion, and a piecewise constant operator. Parameters of the piecewise constant operator are selected to optimize the merge frame. Data streams are switched based on bandwidth requirements, switch requests, and throughput of a network. Images are reconstructed based on the merge frames and prediction frames. Reconstructed images are identically reconstructed for any prediction frame based on the merge frame. | 01-22-2015 |