Method and system for predicted encoding and decoding in chrominance frame of transform domain
An intra-frame prediction coding and intra-frame prediction technology, applied in the field of video coding and decoding, can solve problems such as huge amount of calculation and difficulty in achieving optimal realization of rate-distortion performance
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[0079] Embodiment 1 (coding method 1)
[0080] figure 1 It is a flowchart of a transform domain U chrominance intra prediction coding method according to a preferred embodiment of the present invention; the method includes the following steps:
[0081] S101: According to the size of the transformation matrix in the transformation module, divide the spatial domain U chrominance information block (original block) of the current coding block into a block matrix; the details are as follows:
[0082] U ( 1,1 ) U ( 1,2 ) · · · U ( 1 , m ′ ) U ( 2,1 ) U ( 2,2 ) · · · U ( 2 , m ′ ) · · · · · · · · · · · · U ( m ′ , 1 ) U ( m ′ , 2 ) · · · U ( m ′ , m ′ ) = u ( 1,1 ) u ( 1 , 2 ) · · · u ( 1 , m ) u ( 2,1 ) u ...
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[0138] Embodiment 2 (decoding method 1)
[0139] Such as Figure 4 Shown is a flow chart of a transform domain U chrominance intra prediction decoding method according to a preferred embodiment of the present invention (Embodiment 2 is based on a transform domain U chrominance intra prediction coding method of embodiment 1, and a corresponding one is proposed. A transform domain chrominance intra prediction decoding method); the decoding method includes the following steps:
[0140] S201: Entropy decoding and reordering are performed on the code stream of the current decoding block, and then inverse quantization is performed.
[0141] S202: According to the intra prediction mode of the current decoded block, perform transform domain intra prediction according to the following four prediction modes in the second prediction mode group to obtain the transform domain intra prediction value of the current decoded block.
[0142] The second prediction mode group specifically includes the fo...
Example Embodiment
[0168] Embodiment 3 (system corresponding to coding method 1)
[0169] Figure 5 It is a structural diagram of a transform domain U chrominance intra prediction coding system in preferred embodiment 3 of the present invention; the system includes: a spatial domain U chrominance information block division module, a transform domain sub-block acquisition module, and a transform domain intra prediction module , Intra prediction error calculation module, best intra prediction mode acquisition module,
[0170] The spatial domain U chrominance information block dividing module is used to divide the spatial domain U chrominance information block (original block) of the current coding block into a block matrix according to the size of the transformation matrix in the transformation module;
[0171] The transform domain sub-block acquisition module is used to transform each spatial domain sub-block of the current encoding block to acquire the corresponding transform domain sub-block of the cu...
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