Patent
Encoding digital signals
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TLDR
In this article, a motion factor coding apparatus receives an input video signal which is applied to a subtractor and to a motion estimator which generates motion vectors for the current frame relative to a reference frame that is stored in the estimator.Abstract:
A motion factor coding apparatus receives an input video signal which is applied to a subtractor and to a motion estimator which generates motion vectors for the current frame relative to a reference frame that is stored in the motion estimator. The motion vectors are passed to a buffer which are then iteratively update in a re-estimator. The number of iterations can be set to a fixed number or can be controlled by measuring the effect of each successive update on the motion. When a satisfactory number of iterations is reached, update motion vectors are passed to a motion compensator which generates a predicted frame which is applied as another input to the subtractor where the predicted frame is subtracted from the current frame in the input digital video signal. The subtraction removes temporal redundancy in the signal.read more
Citations
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Patent
Coding of motion vector information
TL;DR: In this article, techniques and tools for encoding and decoding motion vector information for video images are described, where a video encoder yields an extended motion vector code by jointly coding, for a set of pixels, a switch code, motion vectors information, and a terminal symbol indicating whether subsequent data is encoded for the set.
Patent
Advanced bi-directional predictive coding of video frames
TL;DR: In this paper, techniques and tools for coding/decoding of video images, and in particular, B-frames, are described, where a video encoder/decoder determines a fraction for a current image in a sequence.
Patent
Data Compression for Video
TL;DR: In this article, a method of encoding a video signal for transmission, comprising of a plurality of video frames, each frame being divided into a plurality image portions, is proposed, and a table of commonly usable reference portions and transmitting an indication of the table to a decoder.
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Method and apparatus for adaptive multiple-dimentional signal sequences encoding/decoding
TL;DR: In this paper, a hybrid block matching and transform based N-Dimensional signal sequence encoder and decoder is described, which includes an entropy based cost function which can be estimated from certain energy measure of the block matching difference.
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Apparatus, and associated method, for forming a compressed motion vector field utilizing predictive motion coding
TL;DR: In this article, motion compensated prediction is utilized in the representation of motion vector fields, and reduced numbers of bits are required to represent the motion vector field while maintaining a low prediction error, thereby facilitating improved communication of and recreation of, video frames forming a video sequence.
References
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Patent
Apparatus and method for optimizing the rate control in a coding system
TL;DR: In this article, a quantizer scale is selected for each macroblock such that the target bit rate for the picture is achieved while an optimal quantization scale ratio is maintained for successive macroblocks to produce a uniform visual quality over the entire picture.
Patent
Method and apparatus for determining motion vectors for image sequences
Andre Zaccarin,Bede Liu +1 more
TL;DR: In this article, a block-based motion estimation method is used to determine motion vectors for blocks of pixels in a current frame or field, where only a portion of blocks from a predetermined pattern of blocks in the current frame and field are searched for a match with a block of pixels from a previous frame and/or field over a designated search area.
Proceedings ArticleDOI
Region-based motion estimation using deterministic relaxation schemes for image sequence coding
Henri Nicolas,Claude Labit +1 more
TL;DR: A new relaxation method for compact quantitative motion estimation using a hierarchy of motion models is presented and the advantages of region-based motion descriptions are illustrated and compared to those of the usual local ones.
Patent
A method for estimating motion contents in video signals.
Peter Weiss,Bjoern Christensson +1 more
TL;DR: In this article, a method for estimating motion contents in a video signal is presented, which is based on hierarchical processing with different block sizes from coarser to finer with prediction of motion vectors from surrounding blocks.
Proceedings ArticleDOI
Block motion estimation based on spatio-temporal correlation
TL;DR: A new motion estimation algorithm which determines an initial motion vector and defines a search window adaptively using the motion information of spatio-temporal neighborhood blocks using the Gibbs/Markov random field model is presented.