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:
Jan. 07, 2003
Filed:
Feb. 17, 1999
Dominic Hugo Symes, Cherry Hinton, GB;
Wilco Dijkstra, Cherry Hinton, GB;
Arm Limited, Cambridge, GB;
Abstract
A clipping and quantization technique is described for producing clipped numbers in a range of 0 to N−1 (from unclipped numbers in a range of −0.5N to (1.5N−1)), where N is 2 and m is the bit length of the desired clipped and quantized number. The most significant bit of the unclipped data value indicates whether an overflow of the permitted range has occurred and that clipping is required. The next most significant bit (m−1 ) indicates which saturated value should be adopted. These properties of the unclipped data value may be exploited to generate the desired clipped and quantized numbers using logical left shifting and conditionally executed saturating instructions executing upon a general purpose processor The shifting operations performed to achieve saturation operation may simultaneously yield quantization.