Method and apparatus for encoding, decoding a video signal using additional control of quantizaton error
a video signal and quantization error technology, applied in the field of methods and apparatus for encoding and decoding video signals, can solve the problem of requiring more efficient codification of common video signals, and achieve the effect of minimizing quantization errors and coding signals with edge and directional structures
Inactive Publication Date: 2016-12-08
LG ELECTRONICS INC
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Benefits of technology
[0027]The present invention can perform more elaborate and advanced prediction using all the decoded information.
[0028]Furthermore, the present invention can code a signal having an edge and directional structure more efficiently by non-casually predicting a video signal using a transform-coded signal together with a predicted signal.
[0029]Furthermore, the present invention can perform more elaborate and advanced prediction by proposing a non-casual coding technology that may be represented by non-orthogonal transform having a form and parameters.
[0030]Furthermore, the present invention can minimize a quantization error by proposing a quantization algorithm for obtaining an optimized transform coefficient.
[0031]Furthermore, the present invention can perform more advanced coding by proposing a method of deriving an optimized quantization step size.
[0032]Furthermore, the present invention can generate an optimized prediction signal using all the already reconstructed signals and a context signal.
Problems solved by technology
However, common video signals need to be more efficiently coded because they have structures not suitable for Gaussian signals.
Method used
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[0064]Hereinafter, exemplary elements and operations in accordance with embodiments of the present invention are described with reference to the accompanying drawings. It is however to be noted that the elements and operations of the present invention described with reference to the drawings are provided as only embodiments and the technical spirit and kernel configuration and operation of the present invention are not limited thereto.
[0065]Furthermore, terms used in this specification are common terms that are now widely used, but in special cases, terms randomly selected by the applicant are used. In such a case, the meaning of a corresponding term is clearly described in the detailed description of a corresponding part. Accordingly, it is to be noted that the present invention should not be construed as being based on only the name of a term used in a corresponding description of this specification and that the present invention should be construed by checking even the meaning of...
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Disclosed herein is a method of encoding a video signal, comprising receiving an original video signal; comparing the original video signal with a previously reconstructed signal; generating a correction signal to minimize a sum of a distortion component and a rate component; and entropy-encoding the correction signal that is transmitted to the decoder for video signal reconstruction, wherein the previously reconstructed signal has been inverse-transformed by additionally using a scaling diagonal matrix.
Description
TECHNICAL FIELD[0001]The present invention relates to a method and apparatus for encoding and decoding a video signal and, more particularly, to a coding technology using an additional control of quantization error.BACKGROUND ART[0002]Compression coding means a set of signal processing technologies for sending digitalized information through a communication line or storing digitalized information in a form suitable for a storage medium. Media, such as videos, images, and voice may be the subject of compression coding. In particular, a technique for performing compression coding on videos is called video compression.[0003]Many media compression technologies are based on two approach methods: predictive coding and transform coding. In particular, a hybrid coding technology includes spatially predicting samples using previously decoded context values and performing transform coding on predicted errors. Such a process is performed on a Gaussian signal so that it has an optimized a Rate ...
Claims
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IPC IPC(8): H04N19/91H04N19/154H04N19/147
CPCH04N19/91H04N19/154H04N19/147H04N19/176H04N19/46H04N19/593H04N19/126H04N19/11H04N19/192H04N19/129H04N19/33H04N19/44H04N19/124H04N19/13H04N19/15H04N19/61
Inventor SAID, AMIRGULERYUZ, ONUR GONENYEA, SEHOON
Owner LG ELECTRONICS INC
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