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:
Feb. 27, 2001
Filed:
Mar. 13, 1998
Tsukasa Hashino, Kanagawa, JP;
Fumihiro Nagasawa, Kanagawa, JP;
Tomoo Hayakawa, Kanagawa, JP;
Hiroshi Takiduka, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A picture signal encoding apparatus and a picture signal decoding apparatus are disclosed. The picture signal encoding apparatus includes: first compression coding device for converting and compression-coding basic picture signals having a sampling frequency ratio of a luminance signal and two color-difference signals of 4:2:2 to have a sampling frequency ratio of the luminance signal and the two color-difference signals of 4:1:1 or 4:2:0 so as to generate first compressed data; encoding residual extracting device for extracting an encoding residual between the basic picture signals and the compressed data; and second compression coding device for compression-coding the extracted encoding residual so as to generate second compressed data. The picture signal decoding apparatus includes: first expansion decoding device for expansion-decoding basic picture data of a predetermined signal standard having a sampling frequency ratio of a luminance signal and two color-difference signals of 4:1:1 or 4:2:0, the basic picture data being generated by compression-coding original picture signals; second expansion decoding device for expansion-decoding enhancement data having a sampling frequency ratio of a luminance signal and two color-difference signals of 4:2:2; and synthesizing device for synthesizing outputs from the first expansion decoding device and the second expansion decoding means so as to generate extended picture data having a sampling frequency ratio of a luminance signal and two color-difference signals of 4:2:2.