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Digital signal processor system

A signal processor, processor system technology, applied in electrical digital data processing, architecture with a single central processor, digital technology network, etc.

Inactive Publication Date: 2006-10-04
FUJITSU GENERAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] This is the case because even driving a single DSP requires a large size ROM, so if driving two or three or more DSPs, there is a problem that a rather large DSP is required. ROM

Method used

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  • Digital signal processor system
  • Digital signal processor system
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Embodiment Construction

[0023] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] figure 1 It is a basic structure of the digital signal processor system according to the present invention.

[0025] In the figure, reference numeral 1 denotes a digital signal processor system comprising at least three modules (2, 3, and 4), that is, one arranged on the input side of the data to be processed (Din ) of the input digital signal processor 2, an output digital signal processor 4 arranged on the processed data output side (Dout), and at least one arranged in the middle between the input digital signal processor 2 and the output digital signal processor 4 Digital Signal Processor 3. The input digital signal processor 2, the intermediate digital signal processor 3, and the output digital signal processor 4 are connected in cascade in the above sequence.

[0026] Here, the input digital signal processor 2, the intermediate d...

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PUM

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Abstract

A digital signal processor system, for example, an FIR filter, enabling a reduction of the memory capacity of a ROM storing various programs, provided with an input digital signal processor arranged at an input side, an output digital signal processor arranged at an output side, and an intermediate digital signal processor interposed between the input digital signal processor and output digital signal processor connected in cascade, the digital signal processors storing inherent programs P1, P2, and P3 and an identical common program Pc shared by these digital signal processors.

Description

technical field [0001] The present invention relates to a digital signal processor (DSP) system, and more particularly, to a digital signal processor system suitable for a digital filter built in an audio player or the like. Background technique [0002] A digital signal processor system is used, for example, for digital filters incorporated in an audio player. [0003] In the past, in order to realize the important low-pass filter and high-pass filter functions for audio players by digital filtering, an infinite impulse response (IIR) type digital filter was utilized in almost all cases so that the Keep the circuit size as small as possible. [0004] However, in recent years, reduction in circuit size has become easier due to faster speed and higher integration of semiconductor devices. Therefore, finite impulse response (FIR) type digital filters, which have not been utilized in the past because circuits inevitably become larger in size, are now drawing attention. Audio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H17/02H04R3/00G06F9/445G06F15/78G11B20/10
CPCG06F15/8053G06F9/445G11B20/10
Inventor 中石信一
Owner FUJITSU GENERAL LTD