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Flexibly adjustable FIR audio digital frequency divider

A digital frequency divider and a technology for adjusting parameters, applied in pulse counters, digital technology networks, counting chain pulse counters, etc. Effect

Active Publication Date: 2017-07-14
SHENZHEN TENDZONE INTELLIGENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although there are digital frequency dividers designed with FIR filters, the number is very small, the application field is narrow, and it cannot be adjusted flexibly during use. Digital frequency divider, so that various parameters can be flexibly adjusted in the frequency division process to meet different frequency division requirements

Method used

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  • Flexibly adjustable FIR audio digital frequency divider
  • Flexibly adjustable FIR audio digital frequency divider
  • Flexibly adjustable FIR audio digital frequency divider

Examples

Experimental program
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Effect test

Embodiment 1

[0029] This flexibly adjustable FIR audio digital frequency divider includes an arithmetic unit and a configuration unit. The arithmetic unit includes a routing module and no less than 2 FIR modules. The routing module includes a switch that controls whether to connect to each FIR module. Parameters, each FIR module includes adjustment parameters involved in frequency division processing. The switch parameters and adjustment parameters are set first, and then transmitted to the routing module and each FIR module through the configuration unit, and then the data stream enters the routed The FIR module opened by the module is output after frequency division processing.

[0030] Such as figure 1 As shown, the computing unit is a TOPO file, the configuration unit is an ARG file, the computing unit includes 1 routing module and 4 FIR modules, and the FIR modules are FIR1, FIR2, FIR3, and FIR4, respectively; Wherein, the routing module includes switch parameters that control whether to...

Embodiment 2

[0033] On the basis of Example 1, such as figure 2 As shown, the adjustment parameters include bypass, isPara, type, order, and freq parameters, and the frequency division processing method of the flexibly adjustable FIR audio digital frequency divider includes:

[0034] Step 101: Set the switch parameters of the routing module, turn on the required number of FIR modules, and perform the operations of steps 102-104 on each FIR module that is turned on;

[0035] Step 102: Set a bypass parameter for each FIR module that is turned on. When the bypass parameter is true, it means that the data stream does not need to be filtered and is output directly;

[0036] Step 103: When the bypass parameter is false, it means that the data stream needs to be filtered. First, set the type parameter identified as the desired filter type, and then set the isPara parameter. When the isPara parameter is true, it means that according to The set type coefficient is imported into the debugged FIR filter co...

Embodiment 3

[0045] On the basis of Embodiment 2, the number of FIR modules is four. Using this technical solution, the flexibly adjustable FIR audio digital frequency divider can obtain single-channel filters, two-frequency, three-frequency and four-frequency filters (such as Figure 3-6 Shown, where Figure 4-6 For a partial list), the crossover effect is better.

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Abstract

The invention relates to a flexibly adjustable finite impulse response (FIR) audio digital frequency divider. The flexibly adjustable FIR audio digital frequency divider comprises an operation unit and a configuration unit, wherein the operation unit comprises a route module and at least two FIR modules, the route module comprises an on-off parameter for controlling whether to connect with each FIR module, and each FIR module comprises an adjustment parameter involving in a frequency division process; the on-off parameter and the adjustment parameter are firstly configured and then are transmitted to the route module and each FIR module through the configuration unit, next a data flow enters an FIR module which is switched on by the route module, and the data flow is subject to frequency division and then is outputted. In use, the on-off parameter and the adjustment parameters are firstly configured and secondly transmitted to the operation unit through the configuration unit, and the operation unit performs frequency division process on the data flow and then outputs the processed data flow. By adopting the technical scheme of the invention, each parameter in a frequency division processing procedure can be flexibly adjusted in order to meet different frequency division requirements.

Description

Technical field [0001] The invention relates to an audio digital frequency divider, in particular to an FIR audio digital frequency divider that can be flexibly adjusted. Background technique [0002] At present, most digital frequency dividers are designed with IIR filters (full name in English: Infinite ImpulseResponse, full name in Chinese: infinite impulse response filter), such as Bessel, Butterworth, Lincoln Weitz-Rile and other types High-pass and low-pass digital filters. Because the IIR digital frequency divider introduces feedback, that is, after the signal is input, the output is looped to stabilize the system with a negative feedback path according to the algorithm. Therefore, it is easy to cause the accumulation of errors and cause the system to have unstable problems. In addition, after the signal passes through the IIR digital frequency division, there will be phase distortion, which is also an inevitable defect in the design of the IIR filter. [0003] The number ...

Claims

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Application Information

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IPC IPC(8): H03H17/00H03K23/00H03K21/00
CPCH03H17/00H03H2017/0081H03K21/00H03K23/00
Inventor 王艳芬
Owner SHENZHEN TENDZONE INTELLIGENT TECH
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