Patent application number | Description | Published |
20080232466 | Encoding Parameter Determination For a Hybrid Encoding Scheme - A method for determining an order of values for an encoding parameter of a hybrid encoding scheme for each frame of a frame sequence for use for encoding the frame sequence by means of the hybrid encoding scheme is described. Using the hybrid encoding scheme, resulting distortions and compression rates for the frames of the frame sequence are established for the case of the complete encoding of the frame sequence, and for the case of the incomplete encoding of a real partial sequence of the frame sequence. Thereupon, establishing of estimated distortions and compression rates for frames of the frame sequence takes place, followed by determining the order of values for the encoding parameter of the hybrid encoding scheme based on the established resulting and estimated distortions and compression rates. | 09-25-2008 |
20100104017 | Encoding of a Plurality of Information Signals Using a Joint Computing Power - A device for encoding a plurality of information signals using a joint computing power includes a plurality of encoders for encoding a respectively different one of the information signals using the joint computing power, wherein each encoder is controllable via at least one respective encoding parameter with regard to its encoding complexity/encoding distortion performance. A provider for providing, for each of the encoders, signal-dependent information dependent on the respective information signal and indicating an encoding distortion of the respective encoder, and a setter for setting the encoding parameters depending on the signal-dependent information considering the joint computing power such that a combination of encoding complexities of the encoders does not exceed a value dependent on the joint computing power are also provided, wherein the setter for setting and the plurality of encoders cooperates such that, with regard to subsequent time intervals, a distribution of the joint computing power depends on the encoding parameters or an encoding complexity of the individual encoders. | 04-29-2010 |
20100118938 | ENCODER AND METHOD FOR GENERATING A STREAM OF DATA - A method generates a stream of data, wherein the stream comprises a plurality of encoded data blocks. The encoded data blocks comprise a plurality of self-contained blocks including all information for decoding the block and a plurality of blocks including only partial information for decoding. The distance of the self-contained blocks in the stream is varied dependent on the content encoded in the stream. The stream is a main stream, and wherein tuning into the main stream is effected via a secondary stream comprising at least a subset of the data blocks of the main stream encoded at a quality different from a quality of the data blocks of the main stream. The self-contained blocks are inserted at positions in the main stream where differences in the quality of the data encoded in the main stream and in the secondary stream are less detectable. | 05-13-2010 |
20120278498 | Transmission Concept for an Access Unit Stream - A transmission signal having a sequence of logical frames embed therein, is constructed such that each logical frame has a useful data section, wherein consecutive access units of an access unit stream are consecutively inserted into the useful data section of the sequence of logical frames, wherein each logical frame into which a begin of an access unit falls, has an access unit table having, per begin of the access units falling into the respective logical frame, a pointer pointing thereto. | 11-01-2012 |
20130010859 | MODEL PARAMETER ESTIMATION FOR A RATE- OR DISTORTION-QUANTIZATION MODEL FUNCTION - A more accurate model parameter estimation is achieved by using a Kalman filter for discretely estimating the model parameters between the consecutive frames of the frame sequence and performing the correction of the time-discrete Kalman filter twice per frame, firstly using a measurement value which depends on a complexity measure of the current frame to achieve a primarily corrected state of the time-discrete Kalman filter, and secondly using a measurement value depending on an actual coding rate or distortion of the video encoder in encoding the current frame using a predetermined quantization which may have been determined by an estimation of the actual rate- or distortion-quantization function according to the primarily corrected state. A rate-quantization model function relates the quantization of the video encoder to the coding rate of the video encoder and is piecewise defined to exhibit quadratic and exponential functions in finer and coarser quantization intervals, respectively. | 01-10-2013 |
20130177240 | IMAGE ENCODER AND IMAGE DECODER - An image encoder includes an extreme value determiner, a floating point-to-integer converter and an encoder. The extreme value determiner determines minimal and maximal values of a floating point image value of each pixel of a part of an image, an image or a group of images. The floating point-to-integer converter maps the floating point image value of each pixel to an integer image value. The minimal floating point image value is mapped to a minimal integer image value of a predefined range of integer image values and the maximal floating point image value is mapped to a maximal integer image value of the predefined range of integer image values. The encoder encodes the integer image value of each pixel to obtain and provide encoded image data of the part of the image, the image or the group of images. | 07-11-2013 |
20130223531 | VIDEO CODING USING TEMPORALLY COHERENT DYNAMIC RANGE MAPPING - A more efficient co-use of dynamic range mapping on the one hand and temporal prediction on the other hand such as, for example, in order to code HDR frame sequences, is achieved by exploiting the concept of weighted prediction in order to transition from the mapping parameter from the reference frame to the currently temporally predicted frame. By this measure, the temporal prediction does not fail and despite the frame-wise variation in the dynamic range mapping, encoding efficiency is, thus, maintained. As a favorable side aspect, weighted temporal prediction is already within the capabilities of existing video coding stages such as, for example, the H.264/AVC. | 08-29-2013 |
20140241418 | INTER-LAYER PREDICTION BETWEEN LAYERS OF DIFFERENT DYNAMIC SAMPLE VALUE RANGE - The ratio between coding quality on the one hand and coding rate on the other hand is increased. To this end, a global predictor and a local predictor are used in combination. The global predictor derives a global tone-mapping function based on a statistical analysis of pairs of values of co-located samples in the first tone-mapped version and the second version of the picture, and applies the global tone-mapping function onto the first tone-mapped version of the picture. The local predictor locally derives a locally varying tone-mapping function based on a statistical analysis of values of co-located samples in the second version of the picture and the globally predicted reference picture in units of sub-portions into which the globally predicted reference picture and the second version of the picture are partitioned, and applies the locally varying tone-mapping function onto the globally predicted reference picture. | 08-28-2014 |