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. 11, 2005
Filed:
Mar. 15, 2001
Kenji Sugiyama, Yokosuka, JP;
Kenji Sugiyama, Yokosuka, JP;
Victor Company of Japan, LTD, Yokohama, JP;
Abstract
First pictures, set at a predetermined interval, to be used as reference pictures for inter-picture prediction of an incoming moving picture and second pictures different from the first pictures are coded. The first pictures are coded by intra-picture coding or unidirectional inter-picture predictive coding. The second pictures are coded by bidirectional inter-picture predictive coding using the first pictures or locally-decoded pictures of the first pictures as the reference pictures, to obtain a moving-picture bitstream. Motion activity is obtained on the incoming moving picture. The moving-picture bitstream is multiplexed with the information of motion activity. An incoming first moving-picture bitstream having bitstreams of the first and the second pictures coded as above at a first code transfer rate is converted into a second moving-picture bitstream at a second code transfer rate. Motion activity is obtained on the incoming first moving-picture bitstream. A decimation rate is set on the second pictures of the incoming first moving-picture bitstream according to at least the motion activity. The bitstreams of the second pictures are only decimated from the incoming first moving-picture bitstream at another predetermined interval according to the decimation rate. A plurality of incoming first moving-picture bitstreams are multiplexed into a moving-picture bitstream at a bit rate lower than a total bit rate of the incoming first moving-picture bitstreams. Each incoming first moving-picture bitstream has first moving-picture bitstreams of the first and the second pictures coded as above. A code amount of the multiplexed bitstream is obtained for each reproduction period as virtual buffer occupancy. A decimation rate is set on the second pictures of the incoming first moving-picture bitstreams according to the virtual buffer occupancy. The bitstreams of the second pictures are decimated from the incoming first moving-picture bitstreams at a predetermined interval according to the decimation rate, to obtain second bitstreams. The second bitstreams are multiplexed to obtain the multiplexed bitstream.