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Method of adaptive motion vetor resolution for video coding

A motion vector and motion vector prediction technology, which is applied in digital video signal modification, image communication, electrical components, etc., can solve problems such as signal reduction

Active Publication Date: 2017-08-18
HFI INNOVATION INC
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Problems solved by technology

[0026] The lossy encoding forward color space conversion as shown in Equation (2) is not normalized, which results in signal reduction when the conversion is applied

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  • Method of adaptive motion vetor resolution for video coding
  • Method of adaptive motion vetor resolution for video coding
  • Method of adaptive motion vetor resolution for video coding

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Embodiment Construction

[0055] The following description is of the best contemplated mode of carrying out the invention. This description is to illustrate the general principles of the invention and should not be construed as limiting the invention. The scope of the invention can best be determined by reference to the appended claims.

[0056] As mentioned before, when adaptive MV resolution is used, and if the current MV and the corresponding TMVP have different MV resolutions, a mismatch between the two MVs will result. Therefore, TMVP operations may not be performed normally. In order to regularize MVs when applying adaptive MV resolution, several methods have been proposed.

[0057] In one embodiment, when the MV of the current slice has integer pixel resolution (ie, use_integer_mv_flag=1), the TMVP is shifted right before being used as the MVP of the current block. For example, when TMVP is applied, if TMVP corresponds to (x, y), operations (x+offx)>>2 and (y+offy)>>2 are performed before (x,...

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Abstract

A method of MVP (motion vector prediction) for video coding with adaptive motion vector resolution is disclosed. According to the method, the MVP coding is applied to the current MV or the current MV is stored depending on the current MV resolution, the reference MV resolution, or both the current MV resolution and the reference MV resolution. In one embodiment, when the current MV resolution corresponds to integer pixel resolution, MVP coding is then applied to the current MV using a modified temporal MV as a motion vector predictor for the current MV, where the modified temporal MV is generated by right-shifting the temporal MV. In another embodiment, when the current MV resolution corresponds to integer pixel resolution, the current MV is left-shifted before it is stored in a memory.

Description

[0001] 【CROSS-REFERENCE TO RELATED APPLICATIONS】 [0002] The present invention claims to apply for PCT patent application with serial number PCT / CN2014 / 088017 on September 30, 2014, PCT patent application with serial number PCT / CN2015 / 071553 on January 26, 2015, and application on February 2015 PCT patent application with serial number PCT / CN2015 / 072175 dated April 3, U.S. provisional patent application with serial number 62 / 154,373 filed on April 29, 2015, and U.S. provisional patent application with serial number 62 / CN filed on June 22, 2015 182,685 U.S. Provisional Patent Application priority. These PCT patent applications and US provisional patent applications are hereby incorporated by reference. 【Technical field】 [0003] The present invention relates to adaptive motion vector resolution in video coding. In particular, the invention relates to applying motion vector prediction based on the current motion vector resolution, the reference motion vector resolution, or bo...

Claims

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Application Information

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IPC IPC(8): H04N19/513
CPCH04N19/52H04N19/139H04N19/176H04N19/523H04N19/117H04N19/124H04N19/86
Inventor 许晓中张凯刘杉安基程张贤国
Owner HFI INNOVATION INC
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