RU2022119483A - METHOD AND DEVICE FOR EFFECTIVE ENCODING OF RESIDUAL BLOCKS - Google Patents

Claims (61)

1. A video decoding device, comprising: decoding unit configured to decoding from the bit stream a flag indicating whether residual signals corresponding to only a partial area of the current block have been encoded, decoding from the bitstream the motion information for the current block, and decoding transform coefficient information for one sub-block of two sub-blocks extracted from the current block from the bit stream to recover transform coefficients when the flag indicates that residual signals corresponding to only a partial area of the current block have been encoded; a prediction block configured to inter-predict the current block based on the motion information to generate a prediction block; an inverse quantization and inverse transform unit, configured to perform inverse quantization and inverse transformation of the transform coefficients in one sub-block, for which the transform coefficient information has been decoded, to generate a residual block for the current block; an adder configured to add the prediction block and the residual block to recover the current block; and a filtering unit configured to set a grid of N samples at equal intervals in the horizontal and vertical directions and perform deblocking filtering at the boundary between two sub-blocks in the current block, which coincides with the grid boundary, wherein, when the current block is a luminance block, a horizontal transform kernel and a vertical transform kernel for said one sub-block are determined based on the relative position of one sub-block in the current block. 2. The apparatus of claim 1, wherein the inverse quantization and inverse transform block is further configured to generate a residual block for the current block by performing inverse quantization and inverse transformation of the transform coefficients in one subblock for which the transform coefficient information has been decoded to generate residuals. signals for one subblock of the two subblocks, and by setting the residual signals for the other subblock of the two subblocks to zero. 3. The apparatus of claim. 1, wherein the decoding block is further configured to decode from the bit stream one or more syntax elements indicating the division type of the current block, determining a split type for the current box to be split into two sub-boxes, depending on one or more syntax elements indicating the split type of the current box, as well as the width and height of the current box, and decoding the transform coefficient information corresponding to only one sub-block of the two sub-blocks, which is determined according to the partition type. 4. The apparatus of claim 3, wherein the partition type for the current block includes: the first type, in which the current block is symmetrically divided in the horizontal direction; the second type, in which the current block is symmetrically divided in the vertical direction; the third type, in which the current block is asymmetrically divided in the horizontal direction; and the fourth type, in which the current block is asymmetrically divided in the vertical direction. 5. The apparatus of claim 4, wherein the decoding unit is further configured to decode the transform coefficient information only for a relatively small subblock of the two subblocks when the division type is the third type or the fourth type. 6. The device according to claim 1, further comprising: a residual filtering block configured to filter a boundary between two sub-blocks in the residual block generated by the inverse quantization and inverse transform block. 7. The apparatus of claim 1, wherein the decoding block is further configured to decode a differential quantization parameter for the current block, and wherein the block of inverse quantization and inverse transformation is additionally configured to obtaining a quantization parameter prediction value from the quantization parameter of at least one adjacent block adjacent to one sub-block for which transform coefficient information has been decoded, and performing inverse quantization using the prediction value of the quantization parameter and the differential quantization parameter for the transform coefficients in one sub-block for which the transform coefficient information has been decoded. 8. A computer-readable non-volatile medium storing a bit stream containing encoded data for a block of video data, the encoded data being decoded from the bit stream by an inter-prediction coding method, said method comprising: decoding from the bitstream the motion information for the current block, decoding from the specified bit stream a flag indicating whether residual signals corresponding to only a partial area of the current block have been encoded, restoring transform coefficients by decoding transform coefficient information for one sub-block of two sub-blocks extracted from the current block from the bit stream, when the flag indicates that residual signals corresponding to only a partial area of the current block have been encoded; inter-prediction of the current block based on the motion information to generate a prediction block; generating a residual block for the current block by performing inverse quantization and inverse transformation of the transform coefficients in one sub-block for which the transform coefficient information has been decoded; restoring the current block by adding the prediction block and the residual block; and setting a grid of N samples at equal intervals in the horizontal and vertical directions and performing deblocking filtering on the boundary between two sub-blocks in the current block, which coincides with the grid boundary, wherein, when the current block is a luminance block, a horizontal transform kernel and a vertical transform kernel for said one sub-block are determined based on the relative position of one sub-block in the current block. 9. The non-volatile computer-readable medium of claim 8, wherein restoring the transform coefficients includes: generating a residual block for the current block by performing inverse quantization and inverse transformation of transform coefficients in one sub-block for which transform coefficient information has been decoded to generate residual signals for one sub-block of two sub-blocks, and by setting the residual signals of another sub-block of two sub-blocks to be zero. 10. The non-volatile computer-readable medium of claim 8, wherein restoring the transform coefficients includes: decoding from the bit stream one or more syntax elements indicating the split type of the current block, determining the split type for the current box to be split into two sub-boxes, depending on one or more syntax elements indicating the split type of the current box and the width and height of the current box, and decoding the transform coefficient information corresponding to only one sub-block of the two sub-blocks, which is determined according to the partition type. 11. The non-volatile computer-readable medium of claim 10, wherein the partition type for the current block includes: the first type, in which the current block is symmetrically divided in the horizontal direction; the second type, in which the current block is symmetrically divided in the vertical direction; the third type, in which the current block is asymmetrically divided in the horizontal direction; and the fourth type, in which the current block is asymmetrically divided in the vertical direction. 12. The non-volatile computer-readable medium of claim 11, wherein decoding the transform coefficient information includes: decoding the transform coefficient information only for a relatively small subblock of the two subblocks when the partition type is the third type or the fourth type. 13. Method for encoding video images, including: encoding into the bitstream the motion information for the current block; inter-prediction of the current block based on the motion information to generate a prediction block; generating a residual block for the current block based on the prediction block; encoding into the bitstream a flag indicating that residual signals corresponding to only a partial area of the current block are encoded; a residual block coding for the current block, wherein said residual block coding includes: performing transformation of the residual signals in one subblock of two subblocks extracted from the current block to generate transform coefficients for one subblock; quantizing transform coefficients for one subblock to generate quantized transform coefficients for one subblock; and encoding the quantized transform coefficients into a bitstream, recovering the residual block for the current block by performing inverse quantization and inverse transformation of the quantized transform coefficients for one sub-block; and restoring the current block by adding the prediction block and the restored residual block; and setting a grid of N samples at equal intervals in the horizontal and vertical directions and performing deblocking filtering on a boundary between two sub-blocks in the current block that matches the grid boundary, wherein, when the current block is a luminance block, a horizontal transform kernel and a vertical transform kernel for said one sub-block are determined based on the relative position of one sub-block in the current block.