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:
Mar. 13, 2001
Filed:
Dec. 10, 1998
Hiroyuki Ishikawa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a picture encoding apparatus, block type determining means,judges whether a frame rate is lower than a threshold value A, and compares a block moving amount with a threshold value B when the frame rate is lower than the threshold value A. If the block moving amount is larger than the threshold value B, the current block is determined as a block to be compressed in a high picture-quality mode. Further, the differential value between the current block and a reference block is calculated, and the value of the high frequency component of the differential block is compared with a threshold value C. If it is larger than the threshold value C, the block is judged as a block to be compressed in the high picture-quality mode. Data amount assignment means,generates a quantization scale factor to assign a data amount to each block in accordance with the block type determined by the block type determining means,, and then supplies the quantization scale factor to quantizing means