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:
Aug. 07, 2007
Filed:
Mar. 30, 2005
Charles E. Polk, Jr., Athens, AL (US);
Lee T. Gusler, Madison, AL (US);
Patrick J. Quirk, Huntsville, AL (US);
Ronald M. Zuckerman, Madison, AL (US);
Joe L. Wilson, Jr., Madison, AL (US);
Charles E. Polk, Jr., Athens, AL (US);
Lee T. Gusler, Madison, AL (US);
Patrick J. Quirk, Huntsville, AL (US);
Ronald M. Zuckerman, Madison, AL (US);
Joe L. Wilson, Jr., Madison, AL (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
The apparatus and method herein splits the function of a digital subscriber line (DSL) modem data pump between a digital signal processor (DSP) and a general purpose host central processing unit (CPU). The DSP () handles all front end data pump processing such as interface to an analog front end (and), FFT processing, FEQ processing, QAM decoding, and bit formatting. The host CPU () handles all back end data pump processing such as DMT tone deordering, data deinterleaving, error detection and correcting, bit descrambling, CRC processing, and the like. In order to enable the DSP () and the CPU () to communicate with each other effectively, buffers () under the control of specialized buffer management methodology (FIG.) are used.