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:
Dec. 25, 2007
Filed:
Nov. 19, 2002
Kanji Mihara, Kanagawa, JP;
Kanji Mihara, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
When repeatedly performing compression and encoding of video data, automatically detecting a previous picture type at an encoder side and performing the compression and encoding by matching GOP phases. A motion compensation unitto a DCT unitperform motion compensation, DCT, etc. on input video data to generate DCT coefficients. A back search unitdetects whether or not there is a relative minimum in the sum of remainders of the results of division by the quantization steps of the DCT coefficients, judges that the picture having the relative minimum has been compressed and encoded to an intra-picture in the previous compression and encoding, and judges the structure of the GOPs (a number N of pictures and an interval M of P pictures) at the previous compression and encoding. A picture type control unitcontrols a picture rearrangement unitbased on the judged GOP structure to make it rearrange pictures of the input video data to an order by which a compression and encoding unitcan perform compression and encoding with the same GOP phase as that of the previous time.