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
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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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