8739results about "Image coding" patented technology

A network adapter for a synchronous logical ring network operates on existing physical twisted-pair telephone topologies. Information propagates around the logical ring, reaching every device on each revolution around the network. Network devices are full-duplex, transmitting and receiving information on every clock cycle. Network devices arbitrate to be elected the network clock device. By synchronizing all network devices to a single reference clock, and providing fixed frames of information propagating around the network at consistent time intervals, the logical ring network ensures that information propagates from one device to another at consistent time intervals. The fixed-length frames are divided into two independent streams: a data stream for the distribution of real-time continuous digital media streams; and a system command stream for the distribution of system commands.

An interlaced image processing module and corresponding method facilitate improved processing of interlaced motion images. In one embodiment, the interlaced image processing module receives image data frames having interlaced first and second fields and produces a reference field and error field. The reference field corresponds to the still image content of the interlaced frame, whereas the error field corresponds to the motion content of the interlaced frame, particularly the motion between fields. Motion between fields is thus represented in the error field, without redundant representation of the still image content provided by the first field. Where there is little motion between fields, the error terms will be small so the predictor preserves the coding efficiency provided by any auto-correlation in the image. Further, the interlaced image processing method does not rely upon pixel group classification, and thus avoids classification errors, and the loss of coding efficiency from still image content in motion classified blocks. Finally, problems presented by relative motion between fields are avoided, as are local artifacts. Another embodiment transforms the interlaced fields into frame data having a high frequency field and a low frequency field.

To achieve an image encoding apparatus that has extensibility by not limiting an image to be referenced, and that can reduce processing time satisfactorily if the processing of an ordinary frame is skipped, the apparatus of the present invention comprises: motion detecting means for detecting a motion vector for each block of a prescribed size from a reference image and an input image; weighted motion-compensation means for, based on the detected motion vector, extracting from the reference image an area of a prescribed size which is wider than the prescribed block size and which contains an area corresponding to each block of the input image, and for creating a predicted image for the input image by applying a predetermined weight to each of pixels in the wider area and by using the weighted pixels of the wider area; a predicted-image memory for storing the predicted image; encoding means for taking a residual between the stored predicted image and the input image, and for encoding the residual; and decoding means for decoding the encoded image data and thereby obtaining a reference image.

An memory module including parallel data compression and decompression engines for improved performance. The memory module includes MemoryF/X Technology. To improve latency and reduce performance degradations normally associated with compression and decompression techniques, the MemoryF/X Technology encompasses multiple novel techniques such as: 1) parallel lossless compression/decompression; 2) selectable compression modes such as lossless, lossy or no compression; 3) priority compression mode; 4) data cache techniques; 5) variable compression block sizes; 6) compression reordering; and 7) unique address translation, attribute, and address caches. The parallel compression and decompression algorithm allows high-speed parallel compression and high-speed parallel decompression operation. The memory module-integrated data compression and decompression capabilities remove system bottlenecks and increase performance. This allows lower cost systems due to smaller data storage, reduced bandwidth requirements, reduced power and noise.

A moving picture variable bit rate coding apparatus receives digitized moving pictures and subjects them to coding according to a variable bit rate method using real time processing in response to the input of the pictures. The apparatus performs variable bit rate coding in real time by sequentially performing blocking, conversion processing, quantization processing, and generation of bit streams in response to the input of digitized moving picture data, and setting a quantization scale used for quantization corresponding to a quantity of generated bit streams to perform coding processing and control of quantization in parallel.

A system 100 for tracking the movement of multiple objects within a predefined area using a continuation of overhead X-Y tracking cameras 24 with attached frequency selective filter 24f. Also employed are perspective Z filming cameras sets 30. Objects to be tracked, such as player 17, have been marked to include some form of frequency selective reflective material such as an ink. Typical markers include patches 7r and 7l, sticker 9 and tape 4a as well as additional body joint markers 17af through 17l. System 100 radiates selected energy 23a throughout the predefined area of tracking that is specifically chosen to reflect off said reflective materials used to mark for instance player 17. The reflected energy is then received by tracking cameras 24 while all other ambient light is blocked by filter 24f. Local Computer System 60 continuously captures images from said tracking cameras 24 which include only the minimum information created by said reflected energy. System 60 efficiently locates said markings on said multiple objects and uses this location information to determine for each marking its angle of rotation, angle of azimuth and distance from a designated origin 17o local to player 17. Local origin 17o is then expressed as a three-dimensional coordinate with respect to the origin of the playing venue 2a. The continuous stream of tracked three-dimensional coordinates, defining the body joints on players such as 17, is then transmitted to a remote computer where it can be used to drive a graphic re-animation of the object movement. Along with this re-animation, additional performance measurements may be derived from the continuous stream and automatically made available in real-time.

Conventionally there has been a case that the direct mode cannot be applied effectively depending on the block. With such being the case, information indicating whether a backward reference frame set by default can be utilized in the direct mode is provided to a decoder. A switching procedure to switch to a compensation method applicable when a collocated block has no forward motion vector for effective use, and the compensation method are also provided to the decoder. Thus, it is possible to clearly determine whether the reference frame can be used in the direct mode. Further, when the frame number has no time information, it is possible to effectively send information indicating the relationship between the reference frame and the current frame. Furthermore, the alternative mode and its switching procedure of the present invention make it possible to improve the prediction performance when the direct mode cannot be applied.

A method of reducing artifacts in an image previously processed by block transform encoding may comprise the steps of:

• • determining block boundaries;
  • determining an approximate metric of artifact visibility;
  • optionally interpolating across block boundaries;
  • adaptively filtering luminance;
  • optionally adaptively filtering chrominance;
  • adaptively adjusting local saturation variation; and
  • adaptively simulating high spatial frequency image detail;

wherein the adaptive steps are executed to an extent or in an amount depending on the metric or standard or measurement of artifact visibility.

A method and apparatus for updating video graphics changes of a managed server to a remote console independent of an operating system. The screen (e.g. frame buffer) of the managed server is divided into a number of blocks. Each block is periodically monitored for changes by calculating a hash code and storing the code in a hash code table. When the hash code changes, the block is transmitted to the remote console. Color condensing may be performed on the color values of the block before the hash codes are calculated and before transmission. Compression is performed on each block and across blocks to reduce bandwidth requirements on transmission. Periodically, the configuration of a video graphics controller and a pointing device of the managed server are checked for changes, such as changes to resolution, color depth and cursor movement. If changes are found, the changes are transmitted to the remote console. The method and apparatus may be performed by a separate processor as part of a remote management board, a "virtual" processor by causing the processor of the managed server to enter a system management mode, or a combination of the two.

An intermediate view synthesis apparatus for synthesizing an intermediate view image from a first image corresponding to a first view and a second image corresponding to a second view different from the first view, the first and second images including depth information, wherein the second image being is divided-up into a non-boundary portion, and a foreground/background boundary region, wherein the intermediate view synthesis apparatus is configured to project and merge the first image and the second image into the intermediate view to obtain an intermediate view image, with treating the foreground/background boundary region subordinated relative to the non-boundary portion. A multi-view data signal extraction apparatus for extracting a multiview data signal from a multi-view representation including a first image corresponding to a first view and a second image corresponding to a second view being different from the first view is also described, the first and second images including depth information.

An image pickup device is constituted by a handset of cellular phone, wherein an image pickup unit photographs a user as first object, to output image data of a first image frame. A facial region detecting circuit retrieves a facial image portion of the user as first object according to image data of the first image frame. An image synthesizing circuit is supplied with image data of a second image frame including persons as second object. The facial image portion is synthesized in a background region being defined outside the persons as second object within the second image frame.

With a digital camera 100, a photographed image 31 is displayed on a liquid crystal display and the user selects a desired image and specifies print specifications of the number of print sheets, a print paper size, a print color mode, etc., then print image data is prepared. The prepared print image, data is transmitted from the digital camera 100 to a color printer of an output unit. An image is printed at the color printer in accordance with the print image data.

A system and method for authenticating an image of an object, include at least one identifier associated with the object, a receiver for interrogating the at least one identifier to produce identification information, a camera system for recording an image from the object including the at least one identifier, and a composite generator for encoding the identification information from the receiver along with the image acquired by the camera system, to produce composite data.

An in-camera two-stage compression implementation is described that reduces the latency between snapshots to a fraction of that otherwise required by other systems that either process complete compression following each snapshot or that incorporate heavy, bulky, and expensive RAM hardware capable of maintaining several raw luminosity records (unprocessed file containing a digital image). In the 1st stage compression the raw luminosity record is quickly, yet partially, compressed to available RAM buffer space to allow a user to expeditiously capture a succeeding image. When the higher-priority processes, the user shooting pictures, and stage one compression subside, a 2nd stage compression, which is slower but more effective, decompresses the earlier partially-compressed images, and re-compresses them for saving in flash memory until they are distributed to a remote platform to be finally converted to the JPEG2000 format.

A method and system for image coding, wherein an image is divided into a plurality of blocks for scanning. The pixels values in the scanned block are represented by a plurality of level-run value pairs, wherein the level value is indicative of a non-zero pixel value and the run value is indicative of the number of consecutive zero pixel values preceding the non-zero pixel value. A plurality of contexts indicative of the level-run value pairs are conveyed to a decoder for allowing the decoder to reconstruct the image based on the contexts. The assignment of the contexts is also based on the level value of a preceding level-run pair. Additionally, instead of an end-of-block symbol, the number of non-zero coefficients is provided to the decoder prior to conveying the contexts thereto.

Transform coefficients for blocks of pixels in an original picture are quantized to produce respective sets of quantization indices for the blocks of pixels. The quantization indices for at least some of the blocks are produced by using a quantization step size that is not uniform within each block. Largest magnitude quantization indices are selected from the respective sets of quantization indices for (run, level) encoding to produce the (run, level) encoded picture. For example, MPEG-2 coded video includes a set of non-zero AC discrete cosine transform (DCT) coefficients for 8x8 blocks of pixels. For scaling the MPEG-2 coded video, non-zero AC DCT coefficients are removed from the MPEG-2 coded video to produce reduced-quality MPEG-2 coded video that includes no more than a selected number of largest magnitude quantization indices for the non-zero AC DCT coefficients for each 8x8 block.

A digital video decoding system receives packetized video data representing programs conveyed on a plurality of video channels. The system includes a plurality of buffers for storing encoded video data representing images of video programs conveyed on a corresponding plurality of video channels. An individual buffer, corresponding to an individual video channel, stores sufficient encoded video data to prevent an underflow condition following switching to decode a program conveyed on the individual video channel. A processor initiates switching to decode a program conveyed on a selected one of the plurality of video channels in response to a user channel selection input. A decoder decodes encoded video data received from one of the plurality of buffers corresponding to the program conveyed on the selected video channel as determined by switching initiated by the processor. The decoder also predicts a next channel to be selected by a user based on, (a) predetermined user channel and program preference criteria, (b) predetermined user channel navigation patterns, or (c) user data entry device sensory data.

A video encoder and method are provided for encoding video signal data for at least one cross-fade picture disposed between a fade-out start picture and a fade-in end picture, where the encoder portion includes a reference picture weighting factor unit for assigning weighting factors corresponding to each of the fade-out start picture and the fade-in end picture, respectively, and the method for encoding cross-fades between pictures includes identifying pictures between which a cross-fade is desired, determining appropriate end-points for the cross-fade, and encoding the end-points prior to encoding the cross-fade picture.

A prediction method, merged method, has been introduced in the enhancement layer of a multiple layer video coding. This merged method was designed to efficiently handle the prediction of the non moving parts in coding of the enhancement layer VOP or frame. All the information for this merged mode prediction is obtained from the base layer, and no additional side information is transmitted. This prediction mode when used together with combination of the existing forward mode, backward mode, and interpolated mode, can improve the coding efficiency for enhancement layer video coding, especially in low bit rate coding. The method can be used in most multiple layer video coding schemes, especially in spatial scalability video coding.

A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud.

Image data is compressed by decomposing the image data into a plurality of resolutions or sized by wavelet decomposition, followed by compression of the resulting data sets. Adaptive Huffman code compression is optimized for compressing the data sets, predictive errors for a low frequency band and the wavelet transformed values for high frequency bands. The image data is thus compressed losslessly and in multiple resolutions such that desired resolution images can be reconstructed and transmitted in accordance with available-bandwidth and viewing capabilities.