US Patent No. 9,819,900

METHOD AND APPARATUS FOR DE-INTERLACING TELEVISION SIGNAL


Patent No. 9,819,900
Issue Date November 14, 2017
Title Method And Apparatus For De-interlacing Television Signal
Inventorship Hong Zhou, Shanghai (CN)
Hu Wei, Shanghai (CN)
Xiaowei Luo, Shanghai (CN)
Sen Wang, Shanghai (CN)
Minjie Chen, Shanghai (CN)
Jun Zhu, Shanghai (CN)
Duan Xue, Shanghai (CN)
Fuhuei Lin, Shanghai (CN)
Assignee SPREADTRUM COMMUNICATIONS (SHANGHAI) CO., LTD., Shanghai (CN)

Claim of US Patent No. 9,819,900

1. A method for de-interlacing a television signal, comprising:
determining whether a pixel to be interpolated is in a strictly static mode;
if it is determined that the pixel to be interpolated is in the strictly static mode, obtaining a pixel value of a first pixel
in a previous field which corresponds to the pixel to be interpolated, and setting a pixel value of the pixel to be interpolated
to be equal to the pixel value of the first pixel in the previous field; and

if it is determined that the pixel to be interpolated is not in the strictly static mode, determining gradient bands along
a plurality of directions by taking the pixel to be interpolated as a center, determining a direction of the pixel to be interpolated
based on the gradient bands, and setting the pixel value of the pixel to be interpolated by interpolation based on the direction,

wherein the method further comprises: before the direction of the pixel to be interpolated is determined based on the gradient
bands, performing downsampling to the gradient bands along the plurality of directions to obtain simplified gradient bands
along the plurality of directions.