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7359440 |
Method and system for extracting key frames from video using a triangle model of motion based on perceived motion energy
A key frame extraction system and method for extracting key frames from a video based on motion analysis of frames within the video. Key frames are highlight frames that are effective in...
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7359439 |
Encoding a still image into compressed video
A method for producing a compressed video bitstream having a plurality of frames from data that specifies a single still image. The still image is encoded into data specifying a single intra...
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7356080 |
MPEG-4 encoder using H.263 multimedia chip
An MPEG-4 encoder utilizing an H.263 multimedia chip. The MPEG-4 encoder includes a DC (Direct Current) predictor for predicting a DC component of the image frame encoded by an H.263 standard upon...
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7352959 |
Moving picture reproducing device and moving picture reproducing method
The moving picture reproducing device to decode frames of moving picture data and synchronously output decoded moving picture data based on time information given to each frame, and to count up the...
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7317759 |
System and methods for video compression mode decisions
A method for making a mode decision in video coding. The method includes collecting a first portion of video data and labeling the first portion of video data with an optimal mode. The method also...
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7305033 |
Method of encoding and decoding motion picture, motion picture encoding device and motion picture decoding device
The present invention discloses a method of encoding and decoding motion picture, a motion picture encoding device and a motion picture decoding device, which enables high-efficiency coding capable...
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7292691 |
Progressive video refresh slice detection
A selective encryption encoder and method of dual selective encryption and detection of intra-coded slices in video content. The selective encryption encoder has a packet identifier that identifies...
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7289564 |
Video encoding method with support for editing when scene changed
A video encoding method with support for editing when scene changed. The video encoding method reads and stores the pictures by the display order and detects whether the scene change occurred. The...
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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...
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7260147 |
Data structure and methods for providing an interactive program guide
A data structure suited to efficiently representing a plurality of image streams including common and non-common portions. Specifically, a plurality of similar group of picture (GOP) data...
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7257157 |
Method of and system for optimizing mode selection for video coding
Mode selection is optimized for video coding requiring sequencing of decisions with respect to a data block sequence. Each decision is selected from a mode set. The sequence is a directed acyclic...
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7251279 |
Apparatus of motion estimation and mode decision and method thereof
An apparatus and method of motion estimation and mode decision includes a candidate vector group generation unit generating a candidate vector group including a motion vector of an adjacent image...
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7245660 |
Method and an apparatus for mixing compressed video
A system for controlling a conference that takes input streams from a variety of sources, at least some of the streams having a relatively low-resolution, and composes the input streams into a...
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7227895 |
System and method for generating decoded digital video image data
Methods and systems are disclosed for decoding image data including I-picture, P-picture, and B-picture encoded data. A method includes receiving encoded image data and selectively performing a...
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7227894 |
Method and apparatus for MPEG-4 FGS performance enhancement
An architecture of a fine granularity scalable (FGS) codec has an encoder and a decoder configurable in three prediction modes. The coarse prediction loop in the base layer of the encoder has a...
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7221706 |
Systems and methods for performing bit rate allocation for a video data stream
The present invention is related to video encoding. In an embodiment, a bit budget is calculated for a first scene. In addition, bit budgets for corresponding frames, including at least a first...
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7212573 |
Method and/or apparatus for determining minimum positive reference indices for a direct prediction mode
An apparatus comprising a first processing circuit and a second processing circuit. The first processing circuit may be configured to generate (i) one or more prediction samples and (ii) a...
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7212570 |
Video converter and computer program for executing said video converter
A video converter for converting a coding format of a great deal of video contents has three kinds of conversion modes including a conversion mode for performing conversion in two steps in...
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7209520 |
Moving picture encoding method and moving picture decoding method
A moving picture coding apparatus 1 includes a counter unit 102 which counts the number of pictures following an intra coded picture; and a motion estimation unit 101 which compares...
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7180901 |
System and method using a packetized encoded bitstream for parallel compression and decompression
A system and method are disclosed for parallel compression and decompression of a bitstream. For compression, the bitstream is separated into a plurality of components, and the components are...
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7173971 |
Trailing artifact avoidance system and method
A system and method is provided to avoid or otherwise reduce luminance and/or chrominance trailing artifacts in block-based hybrid video coders using multiple block sizes and shapes. The proposed...
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7164717 |
Systems and methods for detecting scene changes in a video data stream
The present invention is related to video encoding. In an embodiment, a first root mean squared (RMS) value is calculated for a first frame relative to a second frame, and a second frame relative...
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7161982 |
Device and method for motion video encoding reducing image degradation in data transmission without deteriorating coding efficiency
A code volume control section refers to an input image and a reference image stored in a frame memory and thereby sets a quantization step for each block so that the volume of coded data generated...
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7149249 |
Color video codec method and system
In one aspect of a preferred embodiment, the present invention comprises a system for video compression comprising a video preprocessor; a predictor configured to receive video data from the...
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7149248 |
Command packet system and method supporting improved trick mode performance in video decoding systems
A system, method, and apparatus for reducing the video decoder processing requirements are presented herein. During a rewind operation, a reference picture for a group of pictures is decoded and...
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7126989 |
Image coding method and image decoding method
A picture coding apparatus ( 300 ) is a picture coding apparatus that codes a difference between picture data (Img) representing an input picture and predictive picture data (Pred) representing a...
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7116831 |
Chrominance motion vector rounding
Various techniques and tools for chrominance motion vector rounding are described. For example, during motion compensation, a video encoder or decoder converts luminance motion vectors into...
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7116715 |
Video coding apparatus according to a feature of a video picture
A variance between sequential video pictures is extracted, and then, a GOP boundary position is decided based on inter-frame variance information. Furthermore, simple motion estimation is carried...
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RE39318 |
Image processing method, image processing apparatus and data recording medium
An image processing method for dividing a digital image signal into plural image signals corresponding to plural blocks constituting a single display screen, and performing block-by-block coding of...
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7113542 |
Image editing apparatus and image editing method
An image editing apparatus which edits image data coded by an MPEG method includes an image encoder which codes the image data, an image decoder which decodes the coded image data, and an image...
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7110450 |
Moving picture encoding apparatus
Deterioration of picture quality is prevented even in a transmission environment in which errors easily occur. A block significance determining section produces block significance for each block as...
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7099515 |
Bitplane coding and decoding for AC prediction status information
In one aspect, an encoder/decoder selects a bitplane mode from a group of plural available bitplane modes, and processes a bitplane according to the selected bitplane mode, wherein the bitplane...
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7092576 |
Bitplane coding for macroblock field/frame coding type information
In one aspect, for a first interlaced video frame in a video sequence, a decoder decodes a bitplane signaled at frame layer for the first interlaced video frame. The bitplane represents field/frame...
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7072397 |
Optimal encoding of motion compensated video
The present invention involves a system and method for performing motion estimation. For each candidate motion vector, encoding distortion is determined between a macroblock and a reconstructed...
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7065139 |
Video encoding method and video encoder for improving performance
Video encoding methods and video encoders that provide improved performance while reducing power consumption. In one aspect, a video encoding method comprises the steps of outputting a parameter...
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7058130 |
Scene change detection
In one embodiment, a scene change detection component of a video encoder uses motion vectors to determine whether a scene change occurs in a video sequence. The scene change detection component...
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7054364 |
Moving picture encoding apparatus and moving picture encoding method
An encoding section can perform moving picture compression processes by intra-coding and inter-coding. In accordance with an instruction from a code production amount control section, the encoding...
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7031387 |
B picture mode determining method and apparatus in video coding system
A B picture mode determining method and apparatus in a video coding system includes the steps of: setting sum of absolute difference (SAD) initial values of a 4×4 and 16×16 intra prediction mode,...
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7027509 |
Hierarchical hybrid shot change detection method for MPEG-compressed video
The present invention relates to a hierarchical hybrid shot change detection method in MPEG-compressed video circumstances, wherein the method according to the present invention comprises:...
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7020198 |
Rate control for an MPEG transcoder without a priori knowledge picture type
A rate control system suitable for use with a digital video transcoder, such as one conforming to the MPEG standard. The proposed rate control system starts coding with any reasonable set of...
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7016414 |
Method and system for skipping decoding of overlaid areas of video
A system and method that reduces computational complexity of a decoder by identifying a skippable region in an overlaid area. The invention provides a system for processing encoded video data,...
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7003035 |
Video coding methods and apparatuses
Video coding methods and apparatuses are provided that make use of various models and/or modes to significantly improve coding efficiency especially for high/complex motion sequences. The methods...
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6996174 |
MPEG video decoder with integrated scaling and display functions
A digital video decoder system, method and article of manufacture are provided having integrated scaling capabilities for presentation of video in full size or a predetermined reduced size, while...
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6990146 |
Method and system for detecting intra-coded pictures and for extracting intra DCT precision and macroblock-level coding parameters from uncompressed digital video
The present invention relates to a method and system for extracting coding parameters from uncoded video data. Encoded video data is decoded using an MPEG decoder to produce decompressed video...
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6987809 |
Method for separating image sequences stored on supports such as motion-picture film, video tape or such like
The invention relates to a method for separating successive image sequences of motion-picture films, video tapes or the like into individual sequences. According to said method, sequence changes of...
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6987805 |
Macroblock level intrarefresh technique for encoded video
A method is provided for encoding K>1 sequentially presented video pictures. Each of the K pictures is divided into an m>1 row×n>1 column array of non-overlapping coding units of equal...
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6980595 |
Method and system for distributed video compression in personal computer architecture
A method and system for compressing video data in a computer has video processing that is distributed between preprocessing hardware in a video capture/controller card and a central processing unit...
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6968007 |
Method and device for scalable video transcoding
The invention relates to a scalable video transcoding method for transcoding an input video signal ( 103 ) coded according to MPEG-2 video standard, resulting in four transcoding architectures....
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6965643 |
Image processing apparatus and method, and storage medium storing image processing program
Disclosed are an image processing apparatus and a method therefor, which are characterized by the input of image data, the generation of security data to protect said image data, the control of an...
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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...
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