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Digital signal processing device

A digital signal processing and signal technology, applied in the direction of data processing power supply, register device, machine execution device, etc., can solve the problem of wasting power and so on

Inactive Publication Date: 2009-05-27
YAMAHA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a period in which signal processing is performed without using new coefficients in the arithmetic unit, and in conventional DSPs, supply of read addresses from the address generation circuit to the coefficient memory is continued during this period, and there is a problem of wasting power.

Method used

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  • Digital signal processing device

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Embodiment Construction

[0009] A digital signal processing device according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.

[0010] The drawing is a block diagram showing the configuration of a DSP embodying the digital signal processing device according to the present embodiment. exist figure 1 In the DSP shown, the program counter 1 repeatedly counts its count value from "0" to "N-1" every sampling period of a predetermined length, thereby outputting the count value as address data ADR. The address data ADR is supplied to the program RAM 2 as a read address, and is supplied to the coefficient RAM 4 as a read address via the selector 5 .

[0011] The program RAM 2 has a plurality of areas corresponding to address 0 to address N−1, and commands of N steps to be executed during one sampling period are stored in each area. The commands stored in each area of ​​the program RAM 2 include a coefficient RAM enable bit EN for designating whet...

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Abstract

A digital signal processing device has: program counter generating address data in order; coefficient memory memorizing plural coefficient which processes output corresponding to the address data when the chip selecting signal is effective electrical level; program memory memorizing plural orders, which processes output corresponding to the address data; and operation part operating prescriptive operation according to the order output from the program memory. In addition, the invention confirms whether setting the chip selecting signal to be effective electrical level based on the order output from the program memory. It substitutes the address data and supports the prescriptive value (''0'') to the coefficient memory when the chip selecting signal is inactive electrical level.

Description

technical field [0001] The invention relates to a digital signal processing device used in electronic equipment such as mobile phones, information terminals, and personal computers, and in particular to a digital signal processing device suitable for audio equipment. [0002] The present invention is based on the Japanese patent application No. 2006-109233 filed on April 12, 2006 and claims priority thereof, and its content is quoted here. Background technique [0003] Currently, a DSP (Digital Signal Processor) is used as a digital signal processing device in various electronic devices. As we all know, DSP has the following functions: In order to realize convolution operation (convolution operation) using a predetermined coefficient sequence on an input audio sample string (input audio sample string) in a sampling cycle of a predetermined length of time, repeatedly perform various operations such as product operations or addition operations. kind of arithmetic processing. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F1/32
CPCG06F9/30098G06F9/32
Inventor 浦纯也
Owner YAMAHA CORP
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