Patent application number | Description | Published |
20080214176 | Methods and Devices for the Transmission of Scalable Data - ANS method for transmitting data, in which basic data is transmitted while one or several packets are transmitted with data that complements the basic data and increases the quality of the basic data when being decoded by a receiver. The packets contain at least one field with information about how the complementing data of the respective packet increases the quality of the basic data. The field can be read independently of the complementing data of the respective packet. Based on the information, a decision can be made as to whether the packets are to be forwarded or decoded. | 09-04-2008 |
20090067492 | Method and Device for Minimizing a Quantization Errror - A device minimizes a quantization error in the inverse quantization of a quantized coefficient during a compression method, said quantization error describing a difference between the quantized coefficient after inverse quantization and an associated coefficient prior to quantization. According to said method, at least one parameter that is characteristic of the compression of the quantized coefficient is selected, (at least two characteristic parameters being selected if one of the two characteristic parameters corresponds to a temporal prediction mode), a correction value is chosen based on the selected characteristic parameter(s) and inverse quantization takes place after the correction value has been added to the quantized coefficient. | 03-12-2009 |
20090119314 | Method for Storing Individual Data Elements of a Scalable Bit Stream in File, and Associated Device - Data elements of a scalable data flow are individually stored in at least one file with quality levels of the scalable data flow described by at least one scaling feature in respective scaling levels and at least one data element is associated with every scaling level of the scaling features. A processing index is allocated to each data element so that only data element(s) having a value lower than that processing index must be taken into consideration for processing. At least one descriptive list, containing descriptive elements associated with the data element, namely the scaling level of the respective scaling features, the time index and/or the processing index, is stored in one of the files. | 05-07-2009 |
20090232212 | Adaptive Interpolation in Image or Video Encoding - A method processes and transmits of data in which image data of an image in the transmitter are provided at a first resolution level and at a second resolution level, higher than the first resolution level. At least one interpolation parameter is fixed, for the determination of image data of the second resolution level form image data of the first resolution level. At least some of the image data of the first and the second resolution levels are transmitted, whereby the transmission of the image data the second resolution level depends on at least one fixed interpolation parameter. Furthermore, a definition of the at least one fixed interpolation parameter is transmitted. | 09-17-2009 |
20090300201 | Method for Sending a Media Data Stream and Method for Receiving and Creating a Reconstructed Media Data Stream, and Associated Transmission Apparatus and Receiption Apparatus - A method sends a media data stream in which encoding of the media data stream generates a first data stream and at least one second data stream such that the first data stream represents the media data stream in a basic quality and one or more second data streams together with the first data stream represent the media data stream in an improved quality over the basic quality, in which data in the first and second data streams are respectively sent using a transmission channel allocated in predefined fashion. Another method receives and creates a reconstructed media data stream, in which the reconstructed media data stream is reconstructed from a first data stream or from the first and at least one second data stream, in which data from the first data stream or from the first and at least one second data stream are received in a respective transmission channel allocated in predefined fashion, where the reconstructed media data stream is generated by decoding the data in the first data stream or by decoding the data in the first and at least one second data stream. | 12-03-2009 |
20100254458 | METHOD AND DEVICE FOR ESTABLISHING A CODED OUTPUT VIDEO STREAM FROM AT LEAST TWO CODED INPUT VIDEO STREAMS AND USE OF THE DEVICE AND CODED INPUT VIDEO STREAM - Second images coded in a coded output video stream are generated for the visual display of image contents of first images coded in multiple coded input video streams, such that first coded image data of the coded input video streams are copied into second coded image data of the coded output video stream. | 10-07-2010 |
20120027085 | Method for Encoding of a Video Stream - A temporal sequence of pictures is generated in a method for encoding of a first video stream. To do so, a synchronization signal is used which is derived from a second video stream independently of the first video stream, or the encoding of a second video stream independent of the first video stream is based on the same principle as for the encoding of the first video stream. | 02-02-2012 |
20120069904 | Multiplex Method and Associated Functional Data Structure for Combining Digital Video Signals - Functional data structure for coding a set of digital images which are divided into macroblocks ofpixels coded with colour value statements, including intraprediction macroblocks, wherein each of the images is compressed into at least-one first data stream portion, which comprises a portion of the macroblocks reduced by physical redundancies, and-one second data stream portion, which describes the redundancies, wherein for the intraprediction macroblocks-the first data stream portion is reduced by colour value statements with correlations to colour values from rows of pixels outside and at one edge of the intraprediction macroblock and for which, in the case of pixels outside the compressed image, a colour value default is assumed,-and the second data stream comprises intrapredictors for describing the correlations, with coding of an area which is divided into first areas, each of which is occupied by the macroblocks of one of the digital images, and a second area which spaces apart the first areas and is occupied by pixels with the colour value default. | 03-22-2012 |
20120207213 | METHOD FOR ENCODING SYMBOLS FROM A SEQUENCE OF DIGITIZED IMAGES - Images are divided into image regions. The image regions are processed in encoding cycles such that during an encoding cycle, entropy encoding is carried out in a plurality of parallel encoding branches. In each encoding branch the symbols of an image region are encoded by entropy encoding, which is based on one or more probability models, which take into account the frequencies of symbols occurring in image regions. The probability models are adapted on the basis of the symbols occurring in the image region. A common set of probability models is updated at predetermined time intervals on the basis of frequencies that are adapted in at least one temporally preceding encoding cycle. | 08-16-2012 |
20120288213 | METHOD FOR REDUCING NOISE FOR CODING OF NOISY IMAGES OR IMAGE SEQUENCES - A prediction error (e | 11-15-2012 |
20130114702 | METHOD AND APPARATUS FOR ENCODING AND DECODING VIDEO SIGNAL - An encoder encodes a video signal formed of video frames, each including image blocks. The encoder includes a processing unit which calculates at least one high resolution reference image block on the basis of previously encoded image blocks by executing a super resolution algorithm to perform a local motion compensation; and a motion compensation unit which calculates on the basis of the calculated high resolution reference image block a temporal predictor which is subtracted from a current image block of the video signal. Together, the encoder and a corresponding decoder improve the signal quality of a video signal significantly. | 05-09-2013 |
20130223511 | METHOD AND DEVICE FOR MIXING VIDEO STREAMS AT THE MACROBLOCK LEVEL - The invention relates to a method and device for mixing video streams in a video mixer device, by means of which a plurality of input video streams from different subscribers which are encoded with code words for macroblocks and in which the code words have interdependencies are combined into an output video stream. The input video streams are at least entropy-decoded to such a degree that the dependencies among the code words are dissolved, wherein the macroblocks are re-organized and mixed with each other, and the mixed macroblocks are entropy-encoded to obtain a new dedicated video stream. | 08-29-2013 |
20130300940 | METHOD FOR PROCESSING A COMPRESSED VIDEO STREAM - For a compressed video stream formed of a sequence of compressed data packets, each compressed packet is assigned to a frame by processing the undecoded data packet. A frame includes packets. A first plurality of frames is assigned to a first sliding window and a second plurality of frames is assigned to a second sliding window. The first and second sliding windows have different frames. A first window indicator is calculated by determining a first indicator representing an average number of packets per frame within the first window, and/or a second indicator representing size information of the data within the first window. A second window indicator is calculated by determining a third indicator representing an average number of packets per frame within the second window, and/or a fourth indicator representing size information of the data within the second window. The first and the second window indicators are compared. | 11-14-2013 |
20130301711 | COMPRESSION AND DECOMPRESSION OF REFERENCE IMAGES IN A VIDEO ENCODER - Methods and devices transform image data, which are transformed by a compression filter before being compressed and stored in a reference image memory. In an extension, an inverse transformation to that of the compression filter is performed by a decompression filter when image data from the reference memory are read out and decompressed. The methods and devices can be used for image compression methods and image decompression methods that use reference image memories. | 11-14-2013 |
20130301718 | METHODS AND DEVICES FOR FORMING A PREDICTION VALUE - A method and device form a prediction value. A prediction direction is locally described by nonlinear trajectories. The prediction direction can be used in forming a prediction value to achieve a more accurate prediction determination. The method and device can be used in image compression or image-sequence compression. | 11-14-2013 |
20140003517 | COMPRESSION AND DECOMPRESSION OF REFERENCE IMAGES IN A VIDEO CODING DEVICE | 01-02-2014 |
20140003526 | METHOD FOR CODING A SEQUENCE OF DIGITIZED IMAGES | 01-02-2014 |
20140049607 | Devices and Methods for Sparse Representation of Dense Motion Vector Fields for Compression of Visual Pixel Data - A coding method for the compression of an image sequence involves firstly determining a dense motion vector field for a current image region of the image sequence by comparison with at least one further image region of the image sequence. Furthermore, a confidence vector field is determined for the current image region. The confidence vector field specifies at least one confidence value for each motion vector of the motion vector field. Based on the motion vector field and the confidence vector field, motion vector field reconstruction parameters are then determined for the current image region. Furthermore, a decoding method decodes image data of an image sequence which were coded by such a coding method. | 02-20-2014 |