Title:
METHOD AND DEVICE FOR RESTORING COMPRESSED MOVING IMAGE FOR REMOVING BLOCKING AND RING EFFECTS
Document Type and Number:
Japanese Patent JP3710974
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To sufficiently remove blocking and ring effects that a decoded image signal has by using compressed pixels and finding restored pixels by using normalized parameters.
SOLUTION: On the basis of a center source pixel f(i, j), f(i, j-1) is a left adjacent pixel, f(i, j+1) a right adjacent pixel, f(i-1, j) an upper adjacent pixel, and f(i+1, j) a lower adjacent pixel. Here, (i) and (j) are position information on the respective pixels. Cost functions having directivity are defined by pixels to be decoded and normalization parameters are found according to the cost functions; and the pixels to be decoded are found by applying values which are actually usable to the normalization parameters and processed by discrete consine transform(DCT), and then projection and reverse DCT are performed to restore an image similar to the source pixel.
More Like This:
| JPH0468779 | RECORDER FOR VIDEO SIGNAL AND AUDIO SIGNAL |
| JP3578528 | Data decoder circuit |
| JP3750358 | Data transmission device and data playback device |
Inventors:
Min Chul Hong
Application Number:
JP31421799A
Publication Date:
October 26, 2005
Filing Date:
November 04, 1999
Export Citation:
Assignee:
LG Electronics Co., Ltd.
International Classes:
H04N5/92; G06T9/00; H04N1/41; H04N19/124; H04N19/134; H04N19/176; H04N19/196; H04N19/423; H04N19/44; H04N19/51; H04N19/513; H04N19/60; H04N19/625; H04N19/86; (IPC1-7): H04N7/30; H04N1/41; H04N5/92
Attorney, Agent or Firm:
Masaki Yamakawa
Hiroro Kurokawa
Masayuki Konno
Osamu Nishiyama
Shigeki Yamakawa
Hiroro Kurokawa
Masayuki Konno
Osamu Nishiyama
Shigeki Yamakawa