Method and device for inverse quantization and inverse transformation and non-transitory computer-readable storage medium

Patent metadata

Field	Value
Publication number	US-2022014745-A1
Application number	US-201917295266-A
Country	US
Kind code	A1
Filing date	Nov 20, 2019
Priority date	Nov 20, 2018
Publication date	Jan 13, 2022
Grant date	—

Abstract

Provided are method and device for inverse quantization and inverse transformation and non-transitory computer-readable storage medium. The method includes: performing inverse quantization processing on input data; determining whether secondary inverse transform processing is necessary; performing, in response to determining that the secondary inverse transform processing is necessary, the secondary inverse transform processing on data obtained through the inverse quantization processing, first one-dimensional inverse transform control processing on data obtained through the secondary inverse transform processing, and second one-dimensional inverse transform control processing on data obtained through the first one-dimensional inverse transform control processing; and performing, in response to determining that the secondary inverse transform processing is unnecessary, first one-dimensional inverse transform control processing on the data obtained through the inverse quantization processing, and second one-dimensional inverse transform control processing on the data obtained through the first one-dimensional inverse transform control processing.

First claim

1 . A method for inverse quantization and inverse transform, comprising:
performing inverse quantization processing on input data according to inverse quantization characteristics of different coding and decoding standards; determining whether secondary inverse transform processing is necessary according to a coding and decoding standard of the input data; performing, in response to determining that the secondary inverse transform processing is necessary, the secondary inverse transform processing on data obtained through the inverse quantization processing, first one-dimensional inverse transform control processing on data obtained through the secondary inverse transform processing, and second one-dimensional inverse transform control processing on data obtained through the first one-dimensional inverse transform control processing; and performing, in response to determining that the secondary inverse transform processing is unnecessary, first one-dimensional inverse transform control processing on the data obtained through the inverse quantization processing, and second one-dimensional inverse transform control processing on the data obtained through the first one-dimensional inverse transform control processing.

2 . The method of claim 1 , further comprising:
determining whether it is necessary to perform post-processing on the data obtained through the second one-dimensional inverse transform control processing; performing, in response to determining that the post-processing is necessary, the post-processing on the data obtained through the second one-dimensional inverse transform control processing, and outputting data obtained through the post-processing; and outputting, in response to determining that the post-processing is unnecessary, the data obtained through the second one-dimensional inverse transform control processing.

3 . The method of claim 2 , wherein performing post-processing on the data obtained through the second one-dimensional inverse transform control processing comprises:
performing size transformation on the data obtained through the second one-dimensional inverse transform control processing, such that data obtained through the size transformation are matched with a size standard of a transformation unit.

4 . The method of claim 2 , wherein determining whether it is necessary to perform post-processing on the data obtained through the second one-dimensional inverse transform control processing comprises:
determining, in response to that the coding and decoding standard of the input data is a preset standard and an algorithm adopted in the preset standard comprises a preset algorithm, that it is necessary to perform the post-processing on the data obtained through the second one-dimensional inverse transform control processing.

5 . The method of claim 1 , wherein performing first one-dimensional inverse transform control processing on the data obtained through the inverse quantization processing comprises:
for the different coding and decoding standards, performing, by calling an arithmetic unit, operations for implementing first one-dimensional inverse transform control processing required by processing at different processing time points, wherein the operations for implementing one-dimensional inverse transform control processing comprise multiplication, addition, clip and data registration.

6 . The method of claim 1 , wherein performing second one-dimensional inverse transform control processing on the data obtained through the first one-dimensional inverse transform control processing comprises:
for the different coding and decoding standards, performing, by calling the arithmetic unit, operations for implementing second one-dimensional inverse transform control processing required by processing at different processing time points, wherein the operations for implementing second one-dimensional inverse transform control processing comprise multiplication, addition, clip and data registration.

7 . A device for inverse quantization and inverse transform, comprising:
a cache unit, configured to store data; an arithmetic unit, configured to perform an arithmetic operation; and a control unit, configured to perform inverse quantization processing on input data according to inverse quantization characteristics of different coding and decoding standards; determining whether second inverse transform processing is necessary according to a coding and decoding standard of the input data; perform, in response to determining that the second inverse transform processing is necessary, the second inverse transform processing on data obtained through the inverse quantization processing, first one-dimensional inverse transform control processing on data obtained through the secondary inverse transform processing, and second one-dimensional inverse transform control processing on data obtained through the first one-dimensional inverse transform control processing; and perform, in response to determining that secondary inverse transform is unnecessary, the first one-dimensional inverse transform control processing on the data obtained through the inverse quantization processing and the second one-dimensional inverse transform control processing on the data obtained through the first one-dimensional inverse transform control processing.

8 . The device for inverse quantization and inverse transform of claim 7 , wherein the control unit is further configured to:
determine whether it is necessary to perform post-processing on the data obtained through the second one-dimensional inverse transform control processing; perform, in response to determining that the post-processing is necessary, the post-processing on the data obtained through the second one-dimensional inverse transform control processing, and output data obtained through the post-processing; and output, in response to determining that the post-processing is unnecessary, the data obtained through the second one-dimensional inverse transform control processing.

9 . The device for inverse quantization and inverse transform of claim 8 , wherein the control unit is configured to:
perform size transformation on the data obtained through the second one-dimensional inverse transform control processing, such that data after the size transformation is matched with a size standard of a transformation unit.

10 . The device for inverse quantization and inverse transform of claim 8 or 9 , wherein the control unit is configured to:
determine, in response to that the coding and decoding standard of the input data is a preset standard and an algorithm used in the preset standard comprises a preset algorithm, that it is necessary to perform post-processing on the data obtained through the second one-dimensional inverse transform control processing.

11 . The device for inverse quantization and inverse transform of claim 7 , wherein the control unit is configured to:
for the different coding and decoding standards, perform, by calling the arithmetic unit, operations for implementing first one-dimensional inverse transform control processing required by processing at different processing time points, wherein the operations for implementing first one-dimensional inverse transform control processing comprise multiplication, addition, clip and data registration.

12 . The device for inverse quantization and inverse transform of claim 7 , wherein the control unit is configured to:
for the different coding and decoding standards, perform, perform, by calling the arithmetic unit, operations for implementing second one-dimensional inverse transform control processing required by processing at different process

Assignees

• Zte Corp

Inventors

• Wang Hong
• Xu Ke
• Huang Bo
• Liu Chengqiang
• Luo Sheng
• Lu Guoning
• Zhen Degen

Classifications

• H04N19/60

  using transform coding · CPC title

• H04N19/42 Primary

  characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation (H04N19/635 takes precedence) · CPC title

• H04N19/124 Primary

  Quantisation · CPC title

• H04N19/122 Primary

  Selection of transform size, e.g. 8x8 or 2x4x8 DCT; Selection of sub-band transforms of varying structure or type · CPC title

• H04N19/85

  using pre-processing or post-processing specially adapted for video compression · CPC title