The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2001
Filed:
Dec. 09, 1997
Sang-Hoon Choi, Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
A digital video decoding apparatus for a HDTV includes a variable length decoder (VLD) for variable-length decoding input compressed video data of upper or lower level, an inverse zigzag scan decoder IZZ for inverse zigzag-scan decoding the output data of the VLD, an inverse quantizer for inverse-quantizing the output data of the IZZ, a first inverse DCT for performing inverse DCT with respect to the output data of the inverse quantizer to output restored differential video data of upper level, a second inverse DCT for performing inverse DCT with respect to the output data of the inverse quantizer to output restored differential video data of a lower level, a frequency-divider for frequency-dividing-by-two the motion vector values of upper level output from the VLD, a motion compensator for receiving the motion vector values of low level output from the VLD, the previous restored video data or the motion vector values of high level output from the frequency-divider and the previous restored video data output from a second two-dimensional filter to output motion-compensated data for each changed picture, and a frame memory for storing and outputting restored video data obtained by adding the motion-compensated data of the motion compensator with restored differential video data output from the second IDCT, or for storing and outputting restored video data obtained by adding the motion-compensated data of the motion compensator with the restored differential video data output from the first IDCT and output from a first,D filter.