Method and device for scanning transformation coefficients
A technology of transform coefficient and scanning method, applied in the field of video coding and decoding, can solve the problem of low coding efficiency and achieve the effect of improving coding efficiency
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[0046] See Figure 1A , The flowchart of the first embodiment of the transform coefficient scanning method in the encoding of this application:
[0047] Step 101: Pre-store the correspondence between the prediction mode and the scanning mode.
[0048] In this embodiment of the application, for the image data to be encoded at the encoding end, because it is relatively large, it can be divided into several sub-data blocks for encoding respectively. Each sub-data block can be called a coding unit, and the The coded data is usually a matrix data, the row and column values in the matrix data are consistent, that is, each coding unit is a square matrix data block. When encoding a coding unit, the coding unit needs to be predicted to determine the prediction unit included in the coding unit, and the residual value needs to be transformed to determine the transformation unit of the coding unit.
[0049] Such as Figure 1B Shown is a schematic diagram of the relationship between the coding ...
Example
[0099] See Figure 5 , The block diagram of the first embodiment of the transform coefficient scanning device in the coding of this application:
[0100] The device includes: a storage module 510, a segmentation module 520, a prediction module 530, a search module 540, and a scanning module 550.
[0101] Wherein, the saving module 510 is used to save the corresponding relationship between the prediction mode and the scanning mode;
[0102] The segmentation module 520 is configured to segment the original image to be encoded into several coding units;
[0103] The prediction module 530 is configured to predict the coding unit and obtain the prediction mode of the prediction unit constituting the coding unit;
[0104] The searching module 540 is configured to search for the pre-saved correspondence relationship, and obtain the scanning mode corresponding to the obtained prediction mode;
[0105] The scanning module 550 is configured to scan the transform coefficients in the transform unit ...
Example
[0106] See Image 6 , The block diagram of the second embodiment of the transform coefficient scanning device in the coding of this application:
[0107] The device includes: a storage module 610, a segmentation module 620, a prediction module 630, a calculation module 640, a determination module 650, a transformation module 660, a search module 670, and a scanning module 680.
[0108] Wherein, the saving module 610 is used to save the corresponding relationship between the prediction mode and the scanning mode;
[0109] The segmentation module 620 is configured to segment the original image to be encoded into several coding units;
[0110] The prediction module 630 is configured to predict the coding unit and obtain the prediction mode of the prediction unit that forms the coding unit;
[0111] The calculation module 640 is configured to calculate the residual value of the coding unit according to the original data of the coding unit and the prediction data after predicting the coding ...
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