RU2022119480A - 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, 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 on a boundary between two sub-blocks in the current block that coincides with the grid boundary. 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 residual signals for one subblock of two subblocks, and by setting the residual signals for the other subblock of two subblocks to zero. 3. The device according to claim 1, wherein the decoding unit is further configured to 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 block to be split into two sub-blocks, depending on one or more syntax elements indicating the split type of the current block, as well as the width and height of the current block, 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 transform coefficient information for only a relatively small subblock of the two subblocks when the partition type is the third type or the fourth type. 6. The apparatus of claim 1, wherein the current block is a chrominance block composed of chrominance components. 7. The device according to claim 1, in which N is equal to 8. 8. The apparatus of claim 1, further comprising a residual filtering block configured to filter a boundary between two subblocks in the residual block generated by the inverse quantization and inverse transform block. 9. The apparatus of claim 1, wherein the decoding block is further configured to decode a differential quantization parameter for the current block, 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. 10. The device according to claim 6, in which the inverse quantization and inverse transform unit is configured to obtaining a chrominance block quantization parameter from a quantization parameter of at least one luminance block aligned with the chrominance block, performing inverse quantization using a chrominance block quantization parameter. 11. A computer-readable non-volatile medium storing a bitstream containing encoded data for a block of video data, the encoded data being decoded from the bitstream by an inter-prediction coding method, said method comprising decoding from the bitstream the motion information for the current block, decoding from the specified bitstream a flag indicating whether residual signals corresponding to only a partial region of the current block have been encoded, and 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 a boundary between two sub-blocks in the current block that coincides with the grid boundary. 12. The non-volatile computer-readable medium of claim 11, 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 residual signals of another sub-block of two sub-blocks, zero. 13. The non-volatile computer-readable medium of claim 11, 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 block to be split into two sum-sub-blocks 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. 14. The non-volatile medium configured to be read by the computer of claim 13, 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. 15. The non-volatile computer-readable medium of claim 14, wherein decoding the transform coefficient information includes decoding the transform coefficient information for only a relatively small subblock of two subblocks when the partition type is a third type or a fourth type. 16. A 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; the 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; 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 coincides with the grid boundary.