发明名称 |
Video encoding method with bit depth adjustment for fixed-point conversion and apparatus therefor, and video decoding method and apparatus therefor |
摘要 |
Provided are a video encoding method of adjusting a range of encoded output data to adjust a bit depth during restoring of encoded samples, and a video decoding method of substantially preventing overflow from occurring in output data in operations of a decoding process. The video decoding method includes parsing and restoring quantized transformation coefficients in units of blocks of an image from a received bitstream, restoring transformation coefficients by performing inverse quantization on the quantized transformation coefficients, and restoring samples by performing one-dimensional (1D) inverse transformation and inverse scaling on the quantized transformation coefficients. At least one from among the transformation coefficients and the samples has a predetermined bit depth or less. |
申请公布号 |
US9392285(B2) |
申请公布日期 |
2016.07.12 |
申请号 |
US201514603307 |
申请日期 |
2015.01.22 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
Alshina Elena;Alshin Alexander |
分类号 |
H04N19/60;H04N19/44;H04N19/122;H04N19/115;H04N19/126;H04N19/184;H04N19/42;G06F17/14;H04N19/146;H04N19/18;H04N19/136;H04N19/182 |
主分类号 |
H04N19/60 |
代理机构 |
Sughrue Mion, PLLC |
代理人 |
Sughrue Mion, PLLC |
主权项 |
1. An apparatus configured for decoding a video, the apparatus comprising:
a receiver which is configured for obtaining transformed coefficients of a block from a bitstream; an inverse-quantization unit which is configured for generating inverse-quantized transformed coefficients by performing an inverse-quantization, wherein the performing inverse-quantization comprises performing a right bit-shifting operation based on a base-2 logarithm of a size of the block, and by performing a first clipping on the transformed coefficients, wherein the first clipping is performed after the performing the inverse-quantization and before performing an inverse transformation comprising a vertical inverse-transformation and a horizontal inverse-transformation; and an inverse transformation unit which is configured for generating sample values by performing the vertical inverse-transformation and a second clipping on the inverse-quantized transformed coefficients, and generating residual values by performing the horizontal inverse-transformation on the sample values, wherein the first clipping is performed for restricting the inverse-quantized transformed coefficients to a range of a first bitdepth, and the second clipping is performed for restricting the sample values to a range of a second bitdepth. |
地址 |
Suwon-si KR |