Method and apparatus for predicting frequency transform coefficients in video codec, video encoder and decoder having the apparatus, and encoding and decoding method using the method
A frequency conversion and coefficient conversion technology, applied in the field of encoding and decoding, can solve the problems of inability to perform encoding, inability to obtain predictions reflecting video style characteristics, and inability to perform encoding effectively
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[0038] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which exemplary embodiments of the present invention are shown.
[0039] image 3 A reference diagram showing a method of predicting discrete cosine transform (DCT) coefficients according to an embodiment of the present invention.
[0040] It can be seen that in this embodiment of the present invention, the prediction direction is not only in the horizontal and vertical directions, but also in the diagonal left and diagonal directions. Reference image 3 , The DCT coefficient of block X 310 can also be predicted from the DCT coefficient of block B 330 or the DCT coefficient of block D 350. The prediction direction of the DCT coefficients from the block B 330 is called the right diagonal direction, and the prediction direction of the DCT coefficients from the block D 350 is called the left diagonal direction. Here, when the block A 320, the block B 3...
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