Image processing apparatus and method
AssigneeSony Corporation
InventorTakeshi TSUKUBA
Life of this patent
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Abstract
There is provided an image processing apparatus and an image processing method for enabling suppression of an increase in a memory capacity required for orthogonal transform and inverse orthogonal transform. A second transformation matrix is derived using a first transformation matrix, a prediction residual of an image is orthogonally transformed using the derived second transformation matrix, and coefficient data obtained by orthogonally transforming the prediction residual is encoded to generate a bit stream. The present disclosure can be applied to, for example, an image processing apparatus, an image encoding device, an image decoding device, or the like.
Claims14
An image processing apparatus comprising:
- circuitry configured to
- perform a permutation operation on a prediction residual of an image based on a transform type of an orthogonal transform for the prediction residual,
- perform the orthogonal transform on the prediction residual subjected to the permutation operation, using a base transform matrix corresponding to the transform type, and
- encode coefficient data obtained by performing the orthogonal transform on the prediction residual, to generate a bitstream.
An image processing method comprising:
- performing a permutation operation on a prediction residual of an image based on a transform type of an orthogonal transform for the prediction residual;
- performing the orthogonal transform on the prediction residual subjected to the permutation operation, using a base transform matrix corresponding to the transform type;
- and
- encoding coefficient data obtained by performing the orthogonal transform on the prediction residual, to generate a bitstream.
An image processing apparatus comprising:
- circuitry configured to
- decode a bitstream to obtain coefficient data in which a prediction residual of an image has been subjected to a permutation operation and an orthogonal transform,
- perform an inverse orthogonal transform on the coefficient data, using a base transform matrix corresponding to a transform type of the orthogonal transform, and
- perform a permutation operation on an inverse orthogonal transform result of the coefficient data based on the transform type.
An image processing method comprising:
- decoding a bitstream to obtain coefficient data in which a prediction residual of an image has been subjected to a permutation operation and an orthogonal transform;
- performing an inverse orthogonal transform on the coefficient data, using a base transform matrix corresponding to a transform type of the orthogonal transform;
- and
- performing a permutation operation on an inverse orthogonal transform result of the coefficient data based on the transform type.
Dependencies are inferred from the claim text.