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| Number | Title | Issue Date |
| 8121190 | Method for video coding a sequence of digitized images The invention relates to a method for video coding a sequence of digitized images comprising predicting the contents of each image taking into account a rate distortion optimization criterion being dependent on a Lagrange multiplier; transforming the prediction erro... | 02/21/2012 |
| 8014449 | Communications signal transcoder Communications signal transcoder. A solution is provided to transcode a signal from a first signal type to a second signal type to ensure proper interfacing between devices that may operate using different signal types. For example, within a communication system, a ... | 09/06/2011 |
| 7751477 | Communications signal transcoder Communications signal transcoder. A solution is provided to transcode a signal from a first signal type to a second signal type to ensure proper interfacing between devices that may operate using different signal types. For example, within a communication system, a ... | 07/06/2010 |
| 7653130 | Method and apparatus for bit rate reduction in video telephony Method and apparatus for encoding video is described. In one example, average of motion vectors for each of a plurality of blocks is maintained over a threshold number of inter-coded frames in the video. The running average of motion vectors for each of the pluralit... | 01/26/2010 |
| 7406647 | Systems and methods for forward error correction in a wireless communication network A forward error correction encoder encodes input data words into code words that comprise a parity matrix. In one aspect, the encoder is optimized based on the properties of the parity matrix in order to reduce routing overhead size. ... | 07/29/2008 |
| 7379497 | Encoded data outputting apparatus and method With respect to change of a bit rate at the time of transmitting encoded data TS, a system delay is fixed and the output size of data frame_bit [j] every predetermined data unit is successively calculated, thereby making it possible to continuously obtain data from ... | 05/27/2008 |
| 7342961 | Encoded data outputting apparatus and method With respect to change of a bit rate at the time of transmitting encoded data TS, a system delay is fixed and the output size of data frame_bit [j] every predetermined data unit is successively calculated, thereby making it possible to continuously obtain data from ... | 03/11/2008 |
| 7312785 | Method and apparatus for accelerated scrolling Improved approaches for users to with graphical user interfaces of computing devices are disclosed. A rotational user action supplied by a user via a user input device can provide accelerated scrolling. The accelerated nature of the scrolling enables users to scroll... | 12/25/2007 |
| 7305618 | Methods for multimedia content repurposing Comprehensive multimedia content re-purposing relating to wireless communications employs content constructs that are compact representations of the content information. For video content, the constructs are content operators that represent 2D image regions and/or 3... | 12/04/2007 |
| 7284262 | Receiver/decoder and method of processing video data A method of processing video data in a receiver/decoder including at least one port (31) for receiving data and memory means (40) including a data buffer area (45A0, 45A1) for storing incoming data for display, and a... | 10/16/2007 |
| 7280595 | Post-inverse-quantization AC prediction with a unified variable-length-decoding and inverse-quantization stage A motion-picture-experts group (MPEG) decoder performs AC prediction to decode first-column or first-row coefficients that are coded as differences from corresponding coefficients in a prior block or an above block. Rather than perform AC prediction between the vari... | 10/09/2007 |
| 7277483 | Method and apparatus for rate control for constant-bit-rate finite-buffer-size video encoder A method and apparatus for rate control for a constant-bit-rate finite-buffer-size video encoder is described. Rate control is provided by adjusting the size of non-intra frames based on the size of intra frames. A sliding window approach is implemented to avoid exc... | 10/02/2007 |
| 7274739 | Methods and apparatus for improving video quality in statistical multiplexing The present invention provides methods and apparatus for improving video quality in statistical multiplexing. For each encoding channel in a statistical multiplexer, a respective bit rate need parameter is calculated for encoding of a current frame in that encoding ... | 09/25/2007 |
| 7266148 | Video transcoding apparatus Disclosed is a video transcoding apparatus converting a specific bit rate of an MPEG (moving pictures experts group) bit stream into a different rate thereof for transportation. The present invention includes a video pre-processing unit having a predetermined matrix... | 09/04/2007 |
| 7236521 | Digital stream transcoder A run-level domain transcoder receives a stream of compressed frames carried in a bit stream. The run-level domain transcoder decodes the bit stream into run-level pairs and selectively processes the compressed frames so as to, among other things, reduce the number ... | 06/26/2007 |
| 7180946 | Circuit for filtering video data in the frequency domain The present invention relates to a filter circuit for a set of original data (X0–X7) able to implement in series the steps of discrete transformation (DCT2), correction (ZER) of odd transformed data and inverse discrete transformation (IDCT... | 02/20/2007 |
| 7130349 | Method and apparatus to improve efficiency in multiple-pass, bit-rate-controlled frame encoding Video image data is commonly encoded using a video encoder operating under the control of a bit-rate controller where a plurality of encoding passes are performed so as to improve quality in each video frame. According to an embodiment of the present invention, a sy... | 10/31/2006 |
| 7123654 | Method and apparatus to encode a moving image with fixed computational complexity An apparatus and method thereof to encode a moving image include a discrete cosine transform (DCT) unit performing a DCT process on input video data, a quantizer, and a motion estimation (ME) unit calculating a motion vector and a SAD per macro block. A DCT computat... | 10/17/2006 |
| 7123772 | Image compression by differences within a strip A method of image/video compression by analysis of variability of block DCT coefficients in a strip of (macro)blocks to decide on treatment of the blocks in the strip as either encoding each block or approximation of all blocks in the strip by the corresponding stri... | 10/17/2006 |
| 7092578 | Signaling adaptive-quantization matrices in JPEG using end-of-block codes Previously-unused slots in a Huffman code table associated with a Joint Photographic Experts Group (JPEG) image file are associated with various quantization matrices (Q matrices) that are used to quantize data blocks of the JPEG image file. Huffman codes associated... | 08/15/2006 |
| 7091981 | Data bus compressing apparatus A bus compression apparatus for compressing data is provided to suppress an EMI signal and to simplify a data bus structure. In the apparatus, the voltage levels of the digital output signals are summed in accordance with the resistance values of the data compressio... | 08/15/2006 |
| 7042943 | Method and apparatus for control of rate-distortion tradeoff by mode selection in video encoders A Method And Apparatus For Control of Rate-Distortion Tradeoff by Mode Selection in Video Encoders is Disclosed. The system of the present invention first selects a distortion value D near a desired distortion value. Next, the system determines a quantizer value Q u... | 05/09/2006 |
| 7035897 | Wireless augmented reality communication system The system of the present invention is a highly integrated radio communication system with a multimedia co-processor which allows true two-way multimedia (video, audio, data) access as well as real-time biomedical monitoring in a pager-sized portable access unit. Th... | 04/25/2006 |
| 6999511 | Dynamically switching quant matrix tables within an MPEG-2 encoder A digital video encoder is presented adapted for dynamically switching between sets of quantizer matrix tables without pausing encoding of a stream of video data. Two or more sets of quantizer matrix tables are held at the encoder's quantization unit and compressed ... | 02/14/2006 |
| 6999515 | Encoding block-organized data An information stream organized as a sequence of blocks is encoded according to a graceful degradation principle. The stream poses temporal non-uniform data processing requirements. In particular, with respect to a received block one or more blockwise defined contro... | 02/14/2006 |
| 6963610 | Moving image coding device, moving image coding method and program thereof employing pre-analysis A method of making coding images with a two-pass encode or a pre-analysis, wherein the control quantity is suitably given to a buffer. An image coding device makes compresses and codes moving images, and has a pre-analyzing unit, which exist in a constant interval, ... | 11/08/2005 |
| 6961378 | On-chip dynamic buffer level indicators for digital video encoder Method and encoder for encoding a digital video image stream. The encoding includes spatial compression of still images in the video stream and temporal compression between the still images. The spatial compression is carried out by converting a time domain image of... | 11/01/2005 |
| 6959046 | Resynchronization method for decoding video The present invention relates to a method of resynchronization that attempts to enable a resynchronization of a compressed video data signal received by a decoder, after a transmission error has been detected in said compressed video data signal. The method o... | 10/25/2005 |
| 6959040 | Method and apparatus for coding and decoding image data with synchronized sound data An image processing system including an image coding apparatus and an image decoding apparatus. The image coding apparatus includes an image input unit for acquiring key frames, a matching processor for generating correspondence information between the key frames, a... | 10/25/2005 |
| 6954499 | Moving picture coding, coded-moving picture bitstream conversion and coded-moving picture bitstream multiplexing First pictures, set at a predetermined interval, to be used as reference pictures for inter-picture prediction of an incoming moving picture and second pictures different from the first pictures are coded. The first pictures are coded by intra-picture coding or unid... | 10/11/2005 |
| 6954503 | Video image coding apparatus with individual compression encoding sections for different image divisions A video image coding apparatus which realizes appropriate allocation of an information amount to individual image divisions to reduce the difference in picture quality among different divisions of a decoded image. An input video image signal is into a plurality of i... | 10/11/2005 |
| 6950462 | Video encoding apparatus, video encoding method, and frame rate conversion apparatus When an input picture is inputted to a video interface and stored in a reordering memory, the input time is recorded utilizing a reference time generator and a frame sync signal, and a frame memory to be encoded by an encoding unit is designated using the time infor... | 09/27/2005 |
| 6940902 | Code quantity assignment device and method A code quantity assignment apparatus used for compression encode data storing system is provided. In the apparatus, an image group code quantity assignment device assigns code quantity for every image group so that buffer occupation rate of an image group having a p... | 09/06/2005 |
| 6931060 | Video processing of a quantized base layer and one or more enhancement layers In an encoding process, video data are represented as a bitstream of a quantized base layer and one or more enhancement layers, which capture the difference between a quantized base video picture and an original unquantized input video picture. Due to bandwidth cons... | 08/16/2005 |
| 6931069 | Coding device and coding method To provide a coding device which does not generate a video packet having only a stuffing but can insert a minimum stuffing to prevent an underflow of a buffer in the case in which a video packet has a length limit. A minimum code volume (Tmin) is set for each VOP an... | 08/16/2005 |
| 6928112 | Signal coding method, signal coding apparatus, signal recording medium, and signal transmission method The present invention enables to effectively coding a predetermined time length of a video signal with a variable bit rate at real time (one-path) into a total coding bit amount of a constant data capacity. A coding difficulty calculator 13 determines ... | 08/09/2005 |
| 6922441 | Method for performing integer divides without propagation of truncation error A method and structure for performing a sequence of integer divides without propagation of truncation error. During encoding and decoding of video signals, a buffer is dynamically filled with binary bits of encoded video data at a variable rate, and the data is subs... | 07/26/2005 |
| 6909753 | Combined MPEG-4 FGS and modulation algorithm for wireless video transmission The invention relates to a method and system for modulating an MPEG-4 FGS compressed video stream for variable-bandwidth transmission. A source of a video stream is provided, and a display having means for generating a control input signal for controlling one or mor... | 06/21/2005 |
| 6895054 | Dynamic bit rate control process A process of bit rate control includes asymmetrical reactions to changes in the signal density of the digital video signals. In the process, two different averaging periods are employed to meet a long term bit rate target and to achieve a short term quick reaction. ... | 05/17/2005 |
| 6895050 | Apparatus and method for allocating bits temporaly between frames in a coding system A method and apparatus for temporally allocating bits between frames in a coding system such that temporal fluctuations are smoothed out. Namely, a picture quality is monitored on a frame by frame basis. An average distortion measure is derived from previous picture... | 05/17/2005 |
