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:
Dec. 30, 1997
Filed:
Apr. 26, 1996
Tsutomu Nonaka, Tokyo, JP;
Toshiyuki Naoe, Tokyo, JP;
Hirofumi Sato, Tokyo, JP;
Toshihiko Nishimura, Tokyo, JP;
Naohisa Suzuki, Tokyo, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
In an encoder for decoding compression data obtained by conducting a compression encoding for digital data through subband division, logarithmic compression, and variable-bit-length quantization, an exponent of an exponent operation is separated into an integer part and a fraction part to obtain an operation formula such that an operation related to the fraction part is executed through a multiplication and an operation associated with the integer part is accomplished through a shift operation. In addition, using a correlation between results of the calculations, the number of calculation steps is reduced. Moreover, one type of information data is written in an area in which another type of information data is beforehand written so as to minimize the necessary memory capacity.