Invention Grant
US07774584B2 Discrete multi-tone (DMT) system and method that communicates a data pump data stream between a general purpose CPU and a DSP via a buffering scheme
有权
通过缓冲方案在通用CPU和DSP之间传送数据泵数据流的离散多音（DMT）系统和方法
- Patent Title: Discrete multi-tone (DMT) system and method that communicates a data pump data stream between a general purpose CPU and a DSP via a buffering scheme
- Patent Title (中): 通过缓冲方案在通用CPU和DSP之间传送数据泵数据流的离散多音（DMT）系统和方法
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Application No.: US11769376Application Date: 2007-06-27
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Publication No.: US07774584B2Publication Date: 2010-08-10
- Inventor: Charles E. Polk, Jr. , Lee T. Gusler , Patrick J. Quirk , Ronald M. Zuckerman , Joe L. Wilson, Jr.
- Applicant: Charles E. Polk, Jr. , Lee T. Gusler , Patrick J. Quirk , Ronald M. Zuckerman , Joe L. Wilson, Jr.
- Applicant Address: US TX Austin
- Assignee: Freescale Semiconductor, Inc.
- Current Assignee: Freescale Semiconductor, Inc.
- Current Assignee Address: US TX Austin
- Main IPC: G06F9/30
- IPC: G06F9/30
Abstract:
The apparatus and method herein splits the function of a digital subscriber line (DSL) modem data pump between a digital signal processor (DSP 106) and a general purpose host central processing unit (CPU 102). The DSP (106) handles all front end data pump processing such as interface to an analog front end (108 and 110), FFT processing, FEQ processing, QAM decoding, and bit formatting. The host CPU (102) 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 (106) and the CPU (102) to communicate with each other effectively, buffers (132) under the control of specialized buffer management methodology (FIG. 4) are used.
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