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6192077 |
Coding and decoding apparatus with motion compensation
A coding/decoding apparatus performs predictive coding/decoding with motion compensation. A plurality of motion vectors are unified corresponding to motion of portions of a picture to obtain a...
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RE37057 |
Apparatus and method for converting an HDTV signal to a non-HDTV signal
A digital video signal reception apparatus comprising a multiplexer selection controller for outputting a plurality of control signals according to a format of a compressed input digital video...
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6188796 |
Picture encoder, picture decoder, picture encoding method, picture decoding method, picture encoding program recording medium, and picture decoding program recording medium
It is an object to encode an image signal or a shape signal more efficiently than the prior art. As a means to accomplish the object, the change pixel detector 2 receives the input signal 1 as an...
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6188725 |
Interlaced video signal encoding and decoding method, by conversion of selected fields to progressive scan frames which function as reference frames for predictive encoding
An encoding apparatus includes a selector for periodically selecting fields of an interlaced video signal to be converted to respective progressive scanning frames, by a scanning converter which...
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6181435 |
Image forming method and apparatus
A printer converts print data in page description language into coded band data as a set of objects such as run-length data, trapezoid data and the like, in band units. Processing time to generate...
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RE36999 |
Video signal coding method
In a method for encoding successive frames of a digital motion video signal in the form of compressed digital data including an intraframe coded signal and a plurality of interframe coded signals,...
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6157745 |
Method and system for coding and decoding a sequence of segmented images
The invention relates to an image sequence coding method comprising, after a segmentation of the images into partitions with associated labels, the main steps of coding the contours of the regions...
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6151359 |
Method of video buffer verification
A method is provided for synchronizing video data buffers in a system including: an encoder for encoding input data into a compressed data bitstream; an encoder buffer for storing the compressed...
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6151362 |
Joint rate control for stereoscopic video coding
A method and apparatus are provided for controlling and balancing a quality ratio between left and right channels of a stereoscopic video sequence. A complexity measure for each of the channels is...
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6148032 |
Methods and apparatus for reducing the cost of video decoders
Methods and apparatus for implementing video decoders at a reduced cost are described. The methods include data reduction techniques, simplified inverse quantization techniques, and dynamically...
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6148027 |
Method and apparatus for performing hierarchical motion estimation using nonlinear pyramid
An apparatus and a concomitant method for encoding image sequences and, more particularly, to a method for reducing the computational complexity in determining motion vectors for block-based motion...
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6141385 |
MPEG coded picture decoding apparatus
An MPEG coded picture decoding apparatus is provided which can display video data quite the same as original data even if a miss of MPEG coded video data occurs in a transmission line or the like....
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6128342 |
Video coding apparatus which outputs a code string having a plurality of components which are arranged in a descending order of importance
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...
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6128041 |
Method and apparatus for binary shape encoding
A binary shape encoding apparatus encodes a binary alpha block (BAB) consisting of M×N binary pixels, M and N each being a positive even integer. The apparatus samples every other horizontal lines...
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6128345 |
Image signal coding system
An adaptive blocking coding system selects an effective blocking of an input image signal to be encoded in accordance with the correlation between fields, even if motion is detected between the...
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6125140 |
Processing encoded signals
A frame of time-domain video signals Si is supplied via a frame reorderer (40) to a motion vector estimator (41), and then to a DCT transformer (43) and a quantizer (44) to produce a quantized,...
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6125144 |
Picture coding method and picture coder
A picture coder and a picture coding method which quickly recover the degraded picture quality of partitions, which could not be decoded due to a data error or a data loss, without increasing the...
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6122316 |
MPEG decoding system meeting 2-frame store and letterboxing requirements
A system and method for decoding an MPEG video bitstream comprises, comprising a macroblock core (MBCORE) which processes video bitstream data and computes discrete cosine transform data and a...
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6122314 |
Method and arrangement for encoding a video signal
A system encodes an input video signal by subjecting the input video signal to noise reduction to obtain a noise-reduced signal, and encoding a difference between the noise-reduced signal and a...
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6122315 |
Memory manager for MPEG decoder
An MPEG decoder operates in 2.5 frame store mode, and has an efficient memory management which allows a B picture to be stored and displayed while simultaneously making use of a portion of the...
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6118901 |
Array architecture with data-rings for 3-step hierarchical search block matching algorithm
The invention discloses a 9-cell array architecture with data-rings for 3-step hierarchical search (3SHS) block-matching algorithm. With the efficient data-rings and memory organization, the...
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6118818 |
Method for decoding MPEG standard video bit stream
A method for decoding MPEG standard I (Intra-coded) and P (Predictive-coded) picture bit streams using a memory smaller than one video frame of data. The method includes the steps of receiving a...
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6115071 |
Video signal compression apparatus using noise reduction
Noise reduction circuitry, in a video signal compression apparatus of the predictive DPCM compression type includes a simple nonlinear processing element within the DPCM loop to eliminate residues...
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6115070 |
System and method for DCT domain inverse motion compensation using shared information
Given compressed video which supports the coding of interlaced and noninterlaced frames through DCT and motion compensation, shared information is used in a macroblock for efficient conversion of...
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6111915 |
Picture decoder
A picture decoder decodes P frames without having to wait for a next I frame even if a data loss occurs, and ensures quick recovery from degraded picture quality. The picture decoder sends decoding...
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6104757 |
System and method of error control for interactive low-bit rate video transmission
A new retransmission-based error control technique that does not incur any additional latency in frame playout times and is suitable for interactive video applications. This retransmission...
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6094456 |
Compact image transmission system and image reproducing device capable of reproducing a DCT-based code at a high speed without deterioration of picture quality
Processing is carried out assuming that a picture structure is fixed to I picture and P picture and that motion compensation value is fixed. header analyzing section 11 identifies the type of...
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6091770 |
Image coding and decoding method and related apparatus
In a transmitter, a motion detector detects a motion amount of a coded block. A buffer memorizes a detected motion amount. A buffer controller controls the buffer to read the motion amounts in the...
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6091776 |
Delay balanced video encoder system
A process and apparatus for encoding are provided, wherein fields of a digital signal are processed to detect repeat fields. Adjacent pairs of the non-repeated fields are organized into frames. A...
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6088394 |
Efficient interframe coding method and apparatus utilizing selective sub-frame differencing
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6088061 |
Video coding device and video decoding device
A video coding device capable of making coded data have a hierarchical structure, a specified area of each frame is selected. The position and the shape of the selected area are encoded, a pixel...
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6075918 |
Generation of an intermediate video bitstream from a compressed video bitstream to enhance playback performance
A video decoder system affords playback of video information corresponding to a compressed video bitstream which demands less processor performance than would be demanded for decoding the...
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6075556 |
Three-dimensional image coding by merger of left and right images
A method is disclosed, for encoding a signal with a three dimensional image sequence using a series of left and right images. Each image in the left image series is a picture formed by...
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6069919 |
Low-delay encoding methods of moving pictures
A method of low-delay-encoding digital video data for moving pictures, comprises the steps of determining a first row position of first intra-segments in an image frame and a second row position of...
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6067320 |
Method and apparatus for encoding and decoding images
An image signal expressing pel values and a significance signal, declaring for each pel whether the pel value is significant, are supplied as input signals. By referring to the input significance...
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6061400 |
Methods and apparatus for detecting scene conditions likely to cause prediction errors in reduced resolution video decoders and for using the detected information
Techniques for identifying blocks of pixels, referred to as constant block regions, having approximately the same intensity in terms of luminance values, are discussed. High contrast vertical...
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6057893 |
Picture encoding method, picture encoding apparatus, picture transmitting method and picture recording medium
A picture encoding method in which an input picture signal is encoded in a pre-set sequence by one of a plurality of encoding modes including at least the intra-frame coding and forward predictive...
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6055012 |
Digital multi-view video compression with complexity and compatibility constraints
In a system and method for transmitting and displaying multiple different views of a scene, three or more simultaneous scene signals, representing multiple different views of a scene, are provided...
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6052417 |
Motion image coding apparatus adaptively controlling reference frame interval
A motion image coding apparatus providing enhanced image quality as compared with the prior art includes a coding unit for coding first, second and third frames, a prediction efficiency calculating...
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6052415 |
Early error detection within an MPEG decoder
An MPEG digital video decoder system, method and computer program product are presented for monitoring decoding of an encoded digital video signal for one or more predefined illegal conditions....
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6049570 |
Picture coder
A picture coder decodes P frames without having to wait for the next I frame even if a data loss occurs, and ensures quick recovery from degraded picture quality. The picture coder, which controls...
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6049569 |
Method and apparatus for encoding digital video bit streams with seamless splice points and method and apparatus for splicing such digital video bit streams
A method of encoding a digital video bit stream which includes a plurality of successively-encoded pictures. The method includes the steps of constructing a seamless In Point in accordance with a...
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6047028 |
Method and apparatus for frame manipulation
A method for generating an updated video stream from an incoming video stream for use in image encoding applications includes the steps of replacing each predetermined reference frame amongst a...
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6044115 |
Method and apparatus for coding and decoding digital image data using image quantization modification
An image coding method and apparatus for transforming and quantizing an image to produce transformed and quantized coefficients. The coefficients are coded and a complexity index value is obtained...
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6040862 |
Coding method and recording and reproducing apparatus
A method for coding a video signal made up of a plurality of sequential video frames. First, correspondence information relating color frame information values to types of video coding is provided,...
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6040861 |
Adaptive real-time encoding of video sequence employing image statistics
Method, system and computer program product are provided for adaptively encoding in hardware, software or a combination thereof a sequence of video frames in real-time. A first encoding subsystem...
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6040879 |
Method for decoding video data corrupted by channel noise
In a video decoding method, the video data to be decoded is arranged in a first unit, which first unit includes a plurality of second data units, and each of which second data unit includes an...
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6037986 |
Video preprocessing method and apparatus with selective filtering based on motion detection
Video preprocessing methods and apparatus which utilize motion detection to control selective filtering of pels in a sequence of video frames wherein a video preprocessor generates first and second...
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6037981 |
Method and apparatus for using digital televisions as remote personal computer displays
Use of a digital television as a remote display for a computer system is accomplished by capturing video data signals, compressing the captured video data signals, capturing audio output data...
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6031574 |
Device for storing video data
To reduce the data in a video-server (SER), a compression of the video data of a video film is performed by coding according to the interframe method (K1). In addition, the video data of...
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