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. 04, 2006
Filed:
Feb. 01, 2001
Akira Sugiyama, Kanagawa, JP;
Haruo Togashi, Kanagawa, JP;
Shin Todo, Kanagawa, JP;
Hideyuki Matsumoto, Kanagawa, JP;
Akira Sugiyama, Kanagawa, JP;
Haruo Togashi, Kanagawa, JP;
Shin Todo, Kanagawa, JP;
Hideyuki Matsumoto, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
MPEG streams of different chroma formats are recorded and reproduced without need to recognize their formats. In an MPEG stream, a header is followed by DCT blocks. Time slots are generated in such a manner that when the chroma format detected from the header is 4:2:2, in all periods of DCT blocks, a process is performed and that when the chroma format detected from the header is 4:2:0, a process is not performed in periods for DCT blocks Cband Crthat are not present in the chroma format 4:2:2. The read order of a stream is changed in a memory so as to improve an error resistance. DCT coefficients are rearranged in the order of DC components and AC components from the lowest order component to the highest order component over all DCT blocks. After the stream has been rearranged, time slots are generated in such as manner that when the chroma format is 4:2:0, the process is stopped in the periods for Cband Cr. With the time slots, corresponding to the chroma format, the process is controlled so that the chroma formats 4:2:2 and 4:2:0 can be processed in common.