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. 28, 1995
Filed:
Jun. 23, 1994
John C Schafer, Wylie, TX (US);
Pixel Semiconductor, Inc., Plano, TX (US);
Abstract
A quantization processor (64) is provided that is operable to provide an error diffusion for adjacent output pixels in an output display space. Three quantization processors (300), (302) and (304) are provided for the three colors of the video RGB format. A full adder (312) is provided for receiving both an error signal and an input pixel value. The composite output is input to an input/output error register 328 that is operable to store bits of the output of the adder, determined to be output bits, and also to store the remainder of the bits that are determined to be error or truncated bits. The error or truncated bits are fed back to the input of the full adder. A rounding decoder (306) is operable to receiving a masking word, such that the outputs from the register (326) are either selected as bits to be truncated, provide an error to be added to the next sequential pixel value, or they are selected as outputs. The register (326) is operable to store the error bits for the next sequential cycle.