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:
Sep. 03, 1996
Filed:
Feb. 26, 1993
Kye J Kim, Kyounggi-do, KR;
Tae Y Chung, Seoul, KR;
Abstract
An image signal coding system encodes analog image signals into digital signals in a high-definition digital video tape recorder (D-VTR). A scrambling portion rearranges the image data of a frame formated in the order of vertical subsampling line into a predetermined unit of blocks to distribute the highly variable portions and substantially linear portions in the image data uniformly, while an activity calculation portion calculates a horizontal projection sum and a vertical projection sum of discrete coding transform factors in a unit block and a block activity, respectively to determine a coding area and a quantization step size. An adaptive scanning portion adaptively scans the quantized data in accordance with the coding area determined by the activity calculation portion and a sequential transmission portion sequentially transmits the data coded by a variable length coding in conforming with a predetermined transmitting bit rate in a unit of a fixed length, wherein a block having an underflow producted therein is added with 0 and transferred, while a block having an overflow produced therein is transmitted with only an amount of data coincided with the transfer bit rate.