Canon Kabushiki Kaisha

Axel Lakus-Becker

Ka-Ming Leung

Timothy Merrick Long

Andrew James Dorrell

Steven David Webster

Zhonghua Ma

A system () for encoding an input video frame (), for transmitting or storing the encoded video and for decoding the video is disclosed. The system () includes an encoder () and a decoder () interconnected through a storage or transmission medium (). The encoder () includes a turbo encoder () for forming parity bit data from the input frame () into a first data source (), and a sampler () for down-sampling the input frame () followed by intraframe compression () to form a second data source (). The decoder () receives data from the second data source () to form an estimate for the frame (). The decoder () also receivers the parity bit data from the first data source (), and corrects errors in the estimate by applying the parity bit data to the estimate. Each bit plane is corrected in turn by a turbo decoder (). The decoder determines how reliably a pixel value was decoded, too. Frame reconstruction module () takes advantage of this and discards unreliably decoded pixels and replaces them with predicted pixel values.

Wyner ziv coding

A method () of performing distributed video encoding on an input video frame (), is disclosed. The method () forms a bit-stream from original pixel values of the input video frame (), such that groups of bits in the bit-stream are associated with clusters of spatial pixel positions in the input video frame (). The bit-stream is interleaved to reduce the clustering. The interleaved bit-stream is encoded to generate parity bits from the bit-stream according to a bitwise error correction method.

For error correction in distributed video coding

A method of determining bit rates for use in encoding video data for joint decoding, is disclosed. An approximation of the video data is generated for later use as side information during a process of joint decoding. Bit error probabilities are determined for each bit plane and for each coefficient band of the approximation. The bit rates are determined for encoding the bit planes depending on the bit error probabilities, bit planes, and coefficient bands.

Rate-distortion control in DVC with no feedback channel

A method and system () of decoding video data using joint decoding () of independently encoded sources (and) is disclosed. The method includes storing () an initial estimate of first media data from a first source (). Second media data () from a second source () is received, with the second media data comprising parity bit data for correcting estimates derived from the first media data. The stored initial estimate is then retrieved, and the retrieved initial estimate and the received second media data are utilized to decode () the media data.

Video source coding with decoder side information

A computer implemented method of storing pixel data corresponding to a pixel is disclosed. A first and a second set of pixel data is determined for the pixel. Parity bits for the first set of pixel data are generated, using error correction. An encoded version of the first set of pixel data including the parity bits is stored. An encoded version of the second set of pixel data is stored, using lossless data compression, for use in decoding the first set of pixel data.

DVC as generic file format for plenoptic camera

A method of encoding video data generates a first source of video data from a first set of video frames by approximating the first set of video frames. A second source of video data is generated from a second set of video frames by transforming first respective binary representations of pixel values of said second set of video frames into second respective binary representation of the pixel values of the second set of video frames. The video data sources are encoded independently according to a mapping wherein Hamming distance between each of successive pixel values in a predetermined range of values in the second binary representation is greater than Hamming distance between each of successive pixel values in a predetermined range of values in the first binary representation.

Spatial Wyner Ziv coding

A method of removing an artefact from an image captured with a motion invariant camera is disclosed. The captured image is de-blurred using a spatially invariant blur kernel. An edge filter with a fixed offset is applied to the de-blurred image to identify the location of at least one artefact. A parameter is estimated based on a region either side of the identified location. The at least one artefact is removed from the de-blurred image using the parameter.

Method of removing an artefact from an image

Methods, apparatuses (), and computer program products for generating an enhanced digital image () comprising a plurality of pixels are disclosed. Using a first digital image () captured from a first camera () and parity bits () generated from a second digital image captured by a second camera (), a third digital image () is constructed. The second camera () captures the second image at a resolution different to the resolution of the first camera () capturing the first image (). A disparity map () between the first image () and the third image () is determined (). One of the first image () and the third image () is enhanced () dependent upon the determined disparity map () to generate the enhanced digital image ().

Processing multi-view digital images

A system () for encoding an input video frame (), for transmitting or storing the encoded video and for decoding the video is disclosed. The system () includes an encoder () and a decoder () interconnected through a storage or transmission medium (). The encoder () includes a turbo encoder () for forming parity bit data from the input frame () into a first data source (), and a sampler () for down-sampling the input frame () to form a second data source (). The decoder () receives data from the second data source () to form an estimate for the frame (). The decoder () also receivers the parity bit data from the first data source (), and corrects errors in the estimate by applying the parity bit data to the estimate. Each bit plane is corrected in turn. Bits in bit planes other than a bit plane presently being processed are also modified based in a selective manner.

For spatial Wyner Ziv coding

A method of encoding non-key frame data is disclosed. The method includes forming a bit stream from the data by arranging the bits from the data in a known order. The bit stream is interleaved to form an interleaved bit stream, and parity bits are generated for each of the bit stream and the interleaved bit stream. Bits are deleted from the generated parity bits dependant upon the bit plane of those bits, and an encoded bit stream is created from the remaining parity bits.

Parallel concatenated code with bypass

A method and an encoder () are disclosed for encoding an input bitstream derived from a block of coefficients relating to video data. Leading zeros and tailing zeros are determined and removed () from the input bitstream. Parity bits are generated () for bits remaining in the input bitstream. An encoded bitstream () is then generated, where the encoded bitstream () comprises the number of leading zeros, the number of tailing zeros, and the parity bits.

Growing community of inventors

Artarmon, Australia

Axel Lakus-Becker