|
Match
|
Document |
Document Title |
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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,...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
6891889 |
Signal to noise ratio optimization for video compression bit-rate control
A method of determining a quantization parameter for video compression. A block characteristic for blocks in a video frame is quantized and then used to obtain a candidate quantization parameter....
|
|
|
6868121 |
Coded data output device 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...
|
|
|
6865224 |
Bit rate control for video data compression
In MPEG2 encoding, the quantiser is controlled to manage the occupancy of a video buffer. A dynamically varying working range is determined by forecasting from recent coding history the number of...
|
|
|
6845129 |
Controlling a video-buffer-verifier buffer using an MPEG-like encoder
Possible overflow of a video buffer verifier (VBV) buffer employed in MPEG-like video encoders is prevented by controlling bits being drained from a video encoder buffer (eBuff). Specifically, a...
|
|
|
6760376 |
Motion compensated upconversion for video scan rate conversion
For use in a video image upconversion unit of the type that uses motion compensation to generate an interpolated field using motion vectors, an improved method of motion compensation is disclosed...
|
|
|
6735167 |
Orthogonal transform processor
An orthogonal transform processor which can be implemented in simple hardware. A data reception unit accepts a pair of source data values at intervals of T. For each given pair of source data...
|
|
|
6724818 |
Alternative block orders for better prediction
A method and apparatus for maximizing the prediction utility of previously encoded macroblocks by adjusting the scanning order of the blocks within a macroblock to be encoded is disclosed. Where no...
|
|
|
6724817 |
Adaptive image data compression
The invention relates to a method and apparatus for compressing an image data signal. The apparatus includes a compression control module arranged to eliminate frequency components produced from...
|
|
|
6611674 |
Method and apparatus for controlling encoding of a digital video signal according to monitored parameters of a radio frequency communication signal
Method and apparatus for controlling the operation of a video codec designed for encoding video data suitable for radio transmission between a network and a mobile station. The invention is...
|
|
|
6588867 |
Reciprocal index lookup for BTSC compatible coefficients
In a method of calculating a variable spectral compression filter coefficient in a BTSC compatible stereo encoder from a feedback variable, a reciprocal value that is proportional to a reciprocal...
|
|
|
6570921 |
Data compression assembly having several data-compression channels
A data compression assembly has several data-compression channels (DCC). The data-compression channels may be, for example, encoders which encode different programs in accordance with an MPEG...
|
|
|
6456655 |
Image encoding using activity discrimination and color detection to control quantizing characteristics
An image encoding apparatus is constructed by an orthogonal converting unit for orthogonal converting image data that is inputted every block consisting of a plurality of pixels, thereby obtaining...
|
|
|
6396875 |
Method of switching of coded video sequences and corresponding device
The invention relates to a method of switching from a first to a second coded video sequence when the bitrate of the second one is higher than the bitrate of the first one, and to a corresponding...
|
|
|
6229849 |
Coding device and method
An upper limit of a usable range of a VBV buffer is determined from a preset delay time of the VBV buffer and a designated bit rate. A target bit quantity of a picture (i) and a data occupancy...
|
|
|
6226326 |
Coding device and coding method
A video encoder for changing the bit rate at a halfway point in a GOP by using a TM5 (Test Model 5) bit rate control algorithm is provided. Using a bit quantity Rj(+1) allocated to non-coded...
|
|
|
6141380 |
Frame-level rate control for video compression
The algorithm assumes a constant bit rate over a timing window of specified duration (e.g., a specified number of consecutive frames), where the current frame to be encoded lies in the interior of...
|
|
|
5974185 |
Methods and apparatus for encoding video data using motion vectors for decoding by regular or downconverting decoders
Plurality of encoding methods and apparatus for encoding video data in a manner that makes it well suited for decoding by either regular or downconverting decoders are described. In one embodiment,...
|
|
|
5973738 |
Method and apparatus for improved video coding
The present invention includes a video encoder optimized so as to be implemented using general purpose DSPs or as software executable on a general purpose microprocessor. The present invention...
|
|
|
5933535 |
Object-based video compression process employing arbitrarily-shaped features
Video encoding and decoding processes provide compression and decompression of digitized video signals representing display motion in video sequences of multiple image frames. The encoder process...
|
|
|
5920359 |
Video encoding method, system and computer program product for optimizing center of picture quality
A digital video encoding method, apparatus and computer program product are described with enhanced encoding of a picture having a plurality of macroblocks. The approach is to partition the picture...
|
|
|
5912706 |
Video coding/decoding apparatus which codes information indicating whether an intraframe or interframe predictive coding mode is used
A video coding/decoding apparatus comprises a prediction circuit that divides an input video signal into large regions and small regions in a hierarchical fashion and produces a prediction signal...
|
|
|
5905534 |
Picture decoding and encoding method and apparatus for controlling processing speeds
In accordance with this invention, in a moving picture decoding apparatus, MB (Macro Block) buffer 111 is provided to thereby absorb difference between read speed from IDCT (Inverse Discrete Cosine...
|
|
|
5838392 |
Adaptive block-matching motion estimator with a compression array for use in a video coding system
An adaptive block-matching motion estimator for used in a video coding system wherein the adaptive block-matching motion estimator is less in hardware complexity and latency time and is therefore...
|
|
|
5764553 |
Generalized data processing path for performing transformation and quantization functions for video encoder systems
A generalized data processing path including memory, select logic, adders, subtractors, multipliers, and accumulators (MACs) is organized to perform discrete cosine transforms (DCT), quantization,...
|
|
|
5761398 |
Three stage hierarchal motion vector determination
A rate control algorithm for an MPEG-2 compliant encoder of the present invention has embodiments useful for constant bit rate and variable bit rate encoding. In particular, the invention relates...
|
|
|
5703651 |
Motion picture expert group (MPEG) video coder/decoder apparatus
An MPEG video CODEC includes a variable length decoder to a video coder with respect to an MPEG-2 profile. The MPEG video CODEC further includes a controller which controls both a signal sequence...
|
|
|
5592226 |
Method and apparatus for video data compression using temporally adaptive motion interpolation
In a system for compressing video data, temporally adaptive motion interpolation based upon temporal characteristics of human vision is used for establishing threshold levels relative to the degree...
|
|
|
5452104 |
Adaptive block size image compression method and system
In an adaptive block size image compression method and system for compressing image data, a respective method and system for further compressing the image data for transmission. Each block and...
|
|
|
5408274 |
Method and apparatus for compositing compressed video data
Inverse motion compensating devices are used to transform motion compensated transform domain video signals to corresponding transform domain video signals. A compositing mechanism receives the...
|
|
|
5392073 |
Motion estimating device for variable length encoded data
An apparatus for digitally encoding/decoding data including pictorial images and sounds for use in High Definition Television (HDTV), High Definition-Video Tape Recorder (HD-VCR), digital VCR,...
|
|
|
5386233 |
Method for efficient memory use
A system and method are provided for encoding and decoding data in a video processor system wherein image data values represent a plurality of successive images. A current image is stored into a...
|
|
|
5384849 |
Apparatus and method for encoding/decoding data including the suppression of blocking artifacts
A method and apparatus for removing blocking artifacts in an encoder/decoder system. The encoder includes a delay device for delaying original input frame data, a decoder for decoding the...
|
|
|
5043808 |
High definition television arrangement employing motion compensated prediction error signals
A high definition television system that is characterized by low transmission bandwidth is achieved by in a manner removing much of the redundancies in the signal, efficiently encoding the...
|
|
|
4951139 |
Computer-based video compression system
A computer-based video compression system for processing natural information signals, such as video signals or audio signals, for the purpose of forming a compact data file of compressed signals...
|