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US 10,382,792 B2Granted
Method and apparatus for encoding and decoding video signal by means of transform-domain prediction
AssigneeLG Electronics Inc.
InventorsChulkeun Kim, Jin Heo, Sehoon Yea
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Abstract
Disclosed is a method of decoding a video signal. The method includes extracting an intra-prediction mode of a current block from a video signal, generating a prediction block according to the intra-prediction mode, performing a transform on the prediction block, performing a filtering on the transformed prediction block using a spatial correlation coefficient, and generating a reconstruction block based on the filtered prediction block and a residual block, wherein the spatial correlation coefficient is a value determined based on a direction of the intra-prediction mode.
Claims11
A method of decoding a video signal, comprising:
- extracting an intra-prediction mode of a current block from a video signal;
- generating a prediction block according to the intra-prediction mode;
- performing a transform on the prediction block;
- performing a filtering on the transformed prediction block on the frequency domain using a spatial correlation coefficient to minimize a difference between a transformed current block on a frequency domain and a transformed prediction block on the frequency domain;
- generating a reconstruction block on the frequency domain by adding a residual block on the frequency domain and the filtered prediction block on the frequency domain,
- generating a reconstruction block on the spatial domain performing an inverse transform on the reconstruction block on the frequency domain,
- wherein the spatial correlation coefficient is a value determined based on a direction of the intra-prediction mode,
- wherein the spatial correlation coefficient has a different value depending on the intra-prediction mode.
5 more elements
A method of encoding a video signal, comprising:
- determining an intra-prediction mode of a current block;
- generating a prediction block according to the intra-prediction mode;
- performing a transform on the current block and the prediction block;
- obtaining a spatial correlation coefficient to minimize a difference between the transformed current block on a frequency domain and the transformed prediction block on the frequency domain;
- performing a filtering on the transformed prediction block on the frequency domain using the spatial correlation coefficient;
- and
- obtaining a residual block on the frequency domain by subtracting the filtered prediction block on the frequency domain from the transformed current block,
- wherein the spatial correlation coefficient has a different value depending on the intra-prediction mode.
5 more elements
An apparatus for decoding a video signal, comprising:
- a bitstream extraction unit configured to extract an intra-prediction mode of a current block from a video signal;
- an intra-prediction unit configured to generate a prediction block according to the intra-prediction mode;
- a transform unit configured to perform a transform on the prediction block;
- a spatial filtering unit configured to perform a filtering on the transformed prediction block on the frequency domain using a spatial correlation coefficient to minimize a difference between a transformed current block on a frequency domain and a transformed prediction block on the frequency domain;
- and
- a reconstruction unit configured to generate a reconstruction block on the frequency domain by adding a residual block on the frequency domain and the filtered prediction block on the frequency domain,
- an inverse transform unit configured to generate the reconstruction block on the spatial domain performing an inverse transform on the reconstruction block on the frequency domain,
- wherein the spatial correlation coefficient is a value determined based on a direction of the intra-prediction mode.
5 more elements
An apparatus for encoding a video signal, comprising:
- an intra-prediction unit configured to determine an intra-prediction mode of a current block and to generate a prediction block according to the intra-prediction mode;
- a transform unit configured to perform a transform on the current block and the prediction block;
- a spatial filtering unit configured to obtain a spatial correlation coefficient to minimize a difference between the transformed current block on a frequency domain and the transformed prediction block on the frequency domain and to perform a filtering on the transformed prediction block on the frequency domain using the spatial correlation coefficient;
- and
- a subtractor configured to obtain a residual block on the frequency domain by subtracting the filtered prediction block on the frequency domain from the transformed current original block,
- wherein the spatial correlation coefficient has a different value depending on the intra-prediction mode.
3 more elements
Dependencies are inferred from the claim text.