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. 05, 2000
Filed:
Jun. 12, 1998
Toshinobu Haruki, Kyotanabe, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
In a data expanding method, compressed data including a plurality of blocks is first subjected to entropy decoding, block by block, in a horizontal direction. At a last block on each line, the decoded data is subjected to inversive quantization. By decoding the last block on a line, an address is detected that is recorded with head data of a head block on a next line. By the inversive quantization of the last block of the line, a DC value is detected that is required for inversively quantize the head block of the next line. The block beginning from the detected address is subjected to entropy decoding and inversive quantization so that the inversively quantized data is subjected to IDCT conversion using the detected DC value. Also, during expansion, an adjacent block address and a DC value of the current block are detected.