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:
Jun. 04, 2002
Filed:
Nov. 23, 1998
Tatsuo Nitta, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A variable rate communication system comprises a transmission device capable of selectively using one of a predetermined plurality of data rates for each frame determined in stages, and a reception device capable of receiving data transmitted by the plurality of data rates, in which the transmission device comprises data rate decision section decides a data rate used with the latest frame to one of data rates used with the frame immediately before and a different data rate from a data rate used with the frame immediately before by one stage, and encoding section for performing a predetermined encoding processing according to the data rate decided by the data rate decision section to a transmission data, and the reception device comprises decoding section for performing a predetermined decoding processing according to the plurality of data rates to a reception data, respectively, narrowing section for narrowing a candidates of the data rates used with a received latest frame to a part of the plurality of data rates based on a data rate at least used with a frame immediately before, judgment processing section for performing a predetermined judgment processing to judge a data rate used with the latest frame as valid data rates for the narrowed data rates, and reception data selection section for selecting a reception data to which a decoding processing according to a data rate judged by the judgment processing section is performed by the decoding section as a valid reception data.