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:
Oct. 17, 2000
Filed:
Feb. 24, 1997
Mitsuo Harumatsu, Yokohama, JP;
Takeo Ohishi, Yokohama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
Input picture information is divided into first and second division-resultant signals. Y-signal DCT blocks, Cr-signal DCT blocks, and Cb-signal DCT blocks are generated from the first division-resultant signal. Y-signal DCT blocks, Cr-signal DCT blocks, and Cb-signal DCT blocks are generated from the second division-resultant signal. Dummy DCT blocks are generated which are distinguishable from the Y-signal DCT blocks related to the first and second division-resultant signals. The Y-signal DCT blocks, the Cr-signal DCT blocks, and the Cb-signal DCT blocks related to the first division-resultant signal, and the dummy DCT blocks are grouped into macro-blocks each having two Y-signal DCT blocks, one Cr-signal DCT block, one Cb-signal DCT block, and two dummy DCT blocks to modify the first-division-resultant signal into a first modification-resultant signal. The Y-signal DCT blocks, the Cr-signal DCT blocks, and the Cb-signal DCT blocks related to the second division-resultant signal, and the dummy DCT blocks are grouped into macro-blocks each having two Y-signal DCT blocks, one Cr-signal DCT block, one Cb-signal DCT block, and two dummy DCT blocks to modify the second division-resultant signal into a second modification-resultant signal. The first modification-resultant signal is compressed by DCT and variable length encoding while a data amount of the first compression-resultant signal per given number of macro-blocks is maintained at a fixed amount. The second modification-resultant signal is similarly compressed.