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:
Jul. 29, 2003
Filed:
Jun. 08, 2000
Katsuharu Shimura, Kanagawa, JP;
Takunari Inagaki, Saitama, JP;
Sony Corporation, Tokyo, JP;
Abstract
An image compression controller capable of simplifying the quantization coefficient control in an image compression process and attaining a high speed In image compression, including a first quantization circuit for first quantization based on a quantization coefficient on an output signal from a DCT circuit, a second quantization circuit for second quantization based on a second quantization coefficient, counters for counting the number of “0's” in the first quantization data, a quantization coefficient control circuit for generating a plurality of reference control coefficients and generating control coefficients based on counts of the counters and a “0” reference value, a first multiplier for generating a first quantization coefficient based on a reference quantization coefficient and a reference control coefficient, a second multiplier for generating a second quantization coefficient based on a control coefficient and a reference quantization coefficient, and an entropy coding circuit for entropy coding on the second quantization data.