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. 14, 2016
Filed:
Apr. 15, 2013
Nec Corporation, Minato-ku, Tokyo, JP;
Jun Takada, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
A coefficient encoding unit extracts, as a coefficient group, a group of coefficients (wavelet transform coefficients) located spatially at the same positions from a plurality of high-frequency subbands generated by wavelet transform of a two-dimensional signal, and encodes the group. The coefficient encoding unit has: a unit for collectively encoding the wavelet transform coefficients included in the coefficient group; a unit for individually encoding; a unit for extracting, as a mode determination reference coefficient group, a group of already-encoded wavelet transform coefficients located spatially in neighborhood of the encoding target coefficient group; and a unit for comparing the sum of the absolute values of the wavelet transform coefficients included in the mode determination reference coefficient group with a predetermined threshold, and determining whether to collectively encode or individually encode the wavelet transform coefficients included in the encoding target coefficient group.