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US20070140334 Method and apparatus for dynamically adjusting quantization offset values  
An encoding scheme dynamically adjusts a quantization rounding offset parameter used for encoding pictures according to statistics of previously encoded pictures of similar type. A look-up table...
US20100189174 ENCODING VIDEO FRAMES IN A VIDEO ENCODER  
An encoder provided according to an aspect of the present invention uses an approach which seeks to limit the number of bits in each of a sequence of video frames to a same upper limit. By...
US20130259119 APPARATUSES AND METHODS FOR PROVIDING QUANTIZED COEFFICIENTS FOR VIDEO ENCODING  
Apparatuses and methods for optimizing rate-distortion costs in a signal are disclosed. An apparatus may comprise a quantization block that may be configured to generate a plurality of candidates...
US20140233638 FLEXIBLE QUANTIZATION  
A digital media encoder/decoder uses a flexible quantization technique that provides the ability to vary quantization along various dimensions of the encoded digital media data, including spatial,...
US20140334539 METHOD AND DEVICE FOR ARITHMETIC CODING OF VIDEO, AND METHOD AND DEVICE FOR ARITHMETIC DECODING OF VIDEO  
Methods and apparatuses for arithmetic encoding/decoding of video data. The arithmetic decoding method includes arithmetically decoding prefix bit strings representing a two-dimensional location...
US20150124871 Visual Perceptual Transform Coding of Images and Videos  
A method decodes a picture that is encoded and represented by blocks in a bitstream, by first determining, from the bitstream, motion associated with the block. Using a model, the motion is mapped...
US20050135484 Method of encoding mode determination, method of motion estimation and encoding apparatus  
Motion estimation of a macro block in inter16×16, inter16×8, and inter8×16 modes is performed and a determination of whether to further perform motion estimation in a P8×8 mode is made. Motion...
US20140301450 INVERSE TRANSFORMATION METHOD FOR CLIPPING DATA OF INVERSE QUANTIZATION, INVERSE TRANSFORMATION DURING VIDEO DECODING STEP, AND DEVICE THEREFOR  
Provided are video encoding and video decoding for performing clipping on data during inverse quantization and inverse transformation according to blocks. An inverse transformation method...
US20130121404 Transcoder Unit and Method  
A transcoder is provided that achieves lower complexity without picture quality loss. The transcoder may be either an open loop transcoder or a closed loop transcoder.
US20080225945 Constant-quality rate control system and algorithm for regions of interest  
A constant-quality rate control system and algorithm for multiple encoders with a single video source are disclosed. The system comprises a base encoder, a region of interest (ROI) detector, and...
US20060171460 Image conversion apparatus  
A rate conversion apparatus 10 includes a quantization parameter setting unit 107 and a rounding threshold value setting unit 108. The quantization parameter setting unit 107 determines a...
US20110274160 MOVING PICTURE CODING DEVICE, MOVING PICTURE CODING METHOD, AND MOVING PICTURE CODING PROGRAM  
A moving picture coding device is a moving picture coding device which codes a moving picture, and includes: a VBV modeling unit which simulates an occupancy amount of a coded data buffer (VBV...
US20050238096 Fractional quantization step sizes for high bit rates  
At high bit rates, the reconstruction error of compressed video is generally proportional to the squared value of quantization step size, such that full quantization step size increments at high...
US20140086313 METHOD AND APPARATUS FOR REALIZING ADAPTIVE QUANTIZATION IN PROCESS OF IMAGE CODING  
A method for realizing adaptive quantization in image encoding and dequantization in image decoding is disclosed. In the adaptive quantization method, an image to be encoded is divided into one or...
US20130022107 DEBLOCKING OF NON-SQUARE BLOCKS FOR VIDEO CODING  
In one example, a video coding device is configured to decode a first block of video data and a second block of video data, wherein the first block and the second block share a common edge, and...
US20080063051 RATE CONTROL METHOD WITH FRAME-LAYER BIT ALLOCATION AND VIDEO ENCODER  
A video encoder controlling rate of each frame in a current frame set (Group of Picture, GOP), and method thereof. The video encoder comprises a frame grouping device, a GOP initialization device,...
US20150110179 METHOD OF APPLYING EDGE OFFSET  
Provided is a method generates an edge index of a current sample, and applies an edge offset corresponding to the edge index to the current sample. The edge index is generated using the...
US20150215621 RATE CONTROL USING COMPLEXITY IN VIDEO CODING  
In one example, a method of encoding video data includes allocating, based on a complexity of a reference frame and a quantity of bits allocated to a current frame, a quantity of bits to a current...
US20150201196 JOINT MODE DECISION WITH SHARED BIT-BUDGET CONDITION  
Apparatus and method for optimizing encoding and decoding when using embedded block coding, in which each block is independent coded is described. Instead of coding the whole block in response to...
US20140286404 FILTERING METHOD FOR PERFORMING DEBLOCKING FILTERING ON A BOUNDARY BETWEEN AN INTRA PULSE CODE MODULATION BLOCK AND A NON-INTRA PULSE CODE MODULATION BLOCK WHICH ARE ADJACENT TO EACH OTHER IN AN IMAGE  
A filtering method is for performing deblocking filtering on the boundary between an IPCM block and a non-IPCM block adjacent to each other in an image and including: determining a first...
US20150023413 METHOD AND DEVICE FOR CONTROLLING VIDEO BIT RATE  
A method of controlling a video bit rate includes splitting the current frame into a plurality of first sub frames, deriving a sub frame goal bit rate for each of the plurality of first sub...
US20150078440 APPARATUSES AND METHODS FOR ADJUSTING COEFFICIENTS USING DEAD ZONES  
Apparatuses and methods for adjusting coefficients for use in video encoding are described. An example apparatus may include an encoder that may be configured to receive transform coefficients and...
US20060209951 Method and system for quantization in a video encoder  
Described herein is a method and system for quantization in a video encoder. Human eyes have a different sensitivity to different frequency components of a picture. The eye may be less sensitive...
US20060198443 Adaptive frame skipping techniques for rate controlled video encoding  
The disclosure is directed to adaptive frame skipping techniques for rate controlled video encoding of a video sequence. According to the disclosed techniques, an encoder performs frame skipping...
US20050157784 Moving picture coding method and moving picture coding apparatus  
In an embodiment of the invention, a method for coding a moving picture comprises: dividing an inputted picture signal into fractionized signals respectively corresponding a plurality of pixel...
US20060008006 Video encoding and decoding methods and video encoder and decoder  
Video coding and decoding methods and video encoder and decoder are provided. The video encoding method includes determining one of inter predictive coding and intra predictive coding mode as a...
US20060072665 Methods and transcoders that estimate an output macroblock and motion vector for video transcoding  
Methods and transcoders are disclosed for video transcoding input macroblocks to an output macroblock. One of the methods estimates an output macroblock mode for the video transcoding. A spatial...
US20130101028 ENCODING METHOD, DECODING METHOD, DEVICE, PROGRAM, AND RECORDING MEDIUM  
A quantized normalization value and a normalization-value quantization index corresponding to the quantized normalization value are obtained, the quantized normalization value being obtained by...
US20080062322 DIGITAL VIDEO CONTENT CUSTOMIZATION  
A set of customizing operations for digital content is determined in accordance with network condition of a current network communication channel between a content server and one or more receiving...
US20130064293 IMAGE ENCODING/DECODING DEVICE AND METHOD  
A video encoding/decoding apparatus and method are disclosed. The video encoding/decoding apparatus includes: a video encoder for encoding a differential value between a quantization parameter...
US20110249723 Frame Buffer Compression and Memory Allocation in a Video Decoder  
Frame buffer video compression on an input video stream to efficiently allocate and utilize memory used for storing reference frames in a video decoder includes parsing a video header to obtain a...
US20110310962 RATE CONTROL METHOD OF PERCEPTUAL-BASED RATE-DISTORTION OPTIMIZED BIT ALLOCATION  
A rate control method of perceptual-based rate-distortion (R-D) optimized bit allocation is disclosed. An input frame is firstly determined as a key frame or non-key frame. A key frame is...
US20090022218 METHOD FOR CONTROLLING MOVING PICTURE ENCODING USING CHANNEL INFORMATION OF WIRELESS NETWORKS  
Disclosed is a method for controlling bit rates in consideration of wireless channel environment by an apparatus that transmits and receives moving picture encoding data via a wireless network....
US20050195899 Method and apparatus for video coding, predecoding, and video decoding for video streaming service, and image filtering method  
A method and apparatus for video encoding, predecoding, and video decoding for video streaming services. The video encoding method includes encoding first and second video sequences into first and...
US20080225944 Allocation of Available Bits to Represent Different Portions of Video Frames Captured in a Sequence  
A technique of encoding video frames allocates an available number of bits to different portions of the video frame. A processing unit identifies a region of interest (ROI) in a video frame, and...
US20050243931 Video encoding/decoding method and apparatus  
A method of encoding a video using motion compensated prediction includes determining an interpolation coefficient for making a prediction error between a to-be-encoded picture and a predictive...
US20120230396 Method for Embedding Decoding Information in Quantized Transform Coefficients  
A method decodes a picture in a form of a bit-stream. The picture is encoded and represented by vectors of coefficients. Each coefficient is in a quantized form. A specific coefficient is selected...
US20100091842 CODING RATE CONVERSION APPARATUS, CODING RATE CONVERSION METHOD, AND INTEGRATED CIRCUIT  
A plurality of macroblocks constituting coded data are inverse quantized using a first quantization matrix that is used when coding a picture, to obtain a plurality of sets of coefficient data....
US20100316120 MOVING PICTURE CODING DEVICE AND BROADCAST WAVE RECORDING DEVICE  
A device coding a moving picture in units of a group including pictures, including: a generation unit generating quantization matrices; a selection unit selecting a quantization matrix for a...
US20070127565 Video encoding method and device  
The invention relates to a video encoding method provided for encoding each frame of a sequence of successive groups of frames. This method comprises for each successive current frame, itself...
US20110150081 METHOD AND SYSTEM FOR ADAPTIVE QUANTIZATION LAYER REDUCTION IN IMAGE PROCESSING APPLICATIONS  
A method and a system for adaptively (dynamically) reducing quantization layer reduction for removing quantization artifacts in quantized video signals is provided. Adaptively reducing...
US20050063461 H.263/MPEG video encoder for efficiently controlling bit rates and method of controlling the same  
An H.263/MPEG video encoder using DCT in a mobile communication terminal. The H.263/MPEG video encoder controls a quantization value using granularity analysis by motion estimation and efficiently...
US20090086815 CONTEXT ADAPTIVE POSITION AND AMPLITUDE CODING OF COEFFICIENTS FOR VIDEO COMPRESSION  
A coding method, apparatus, and medium with software encoded thereon to implement a coding method. The coding method includes encoding the position of non-zero-valued coefficients in an ordered...
US20120069895 High Quality Video Encoder  
A computerized method for encoding and decoding video comprising: dividing a video frame into macro-blocks; Re-size the video frame into a lower resolution (“resized frame”). Divide the resized...
US20130315301 IMAGE CODING APPARATUS AND METHOD THEREOF  
An image coding apparatus configured to support a coding scheme capable of selecting a size of a block to be coded from a plurality of sizes includes a quantization unit configured to assign a...
US20130107943 Video Quantizer Unit and Method Thereof  
A quantizer and method are disclosed.
US20130058398 ADAPTIVE RATE CONTROL FOR ENCODING OF VARIABLE FRAME RATE VIDEO SOURCES  
Techniques for performing rate control for encoding of video frames are provided. A first timestamp that indicates a prior video frame capture time and a second timestamp that indicates a current...
US20060245496 Encoding of multimedia data  
Methods and apparatus for coding multimedia data such as video data are disclosed. In some embodiments, such methods and apparatus determine an appropriate quantization parameter to be used for...
US20110134997 TRANSCODER  
A technique for suppressing a significant variation of a quantization step value and enabling a stable rate control to be performed. A function is used for calculating a quantization step...
US20090168870 MOVING PICTURE CODING DEVICE, MOVING PICTURE CODING METHOD, AND RECORDING MEDIUM WITH MOVING PICTURE CODING PROGRAM RECORDED THEREON  
According to one embodiment, a moving picture coding device which performs a motion-compensated prediction for moving picture data in macroblocks, applies discrete cosine transform and...