How can i correct this?
Hi
i have an X number of arrays (256 samples each) that represent a speech signal broken down into this X number arrays. I have also another array of Y elements that each element represents the pitch period length (in samples) of each of the arrays mentioned earlier, therefore X=Y.
I would like the arrays (of 256 samples length) when they are represented by a pitch period other than zero, to be broken down into pieces/subarrays of length equal to that of their pitch period. i.e to break down the 256 array into subarrays of 64,64,64,64 samples if that array's pitch period length was 64 samples.
i tried to do that but i am able to get only the very first subarray. they should be repeated but i couldnt do it.
Could somebody take a look at my code and maybe tell me where im wrong?Any help is appreciated.
Cheers
Attachments:
hijacked.zip 37 KB
untitled.PNG 55 KB
Testing TD-PSOLA Algo.vi.vi 241 KB
Your FOR loop dies not do anyting except taking the same subset over and over again, a total of N times. Right? If you want all the subsets, you need to do two things:
Increment the offset with each iteration by the lenght of the subset. Conveniently done my multiplying with [i]. See Image.
Enabling autoindexing at the output tunnel so you keep all the slices in a 2D array. Now you can use index array to get each slice as needed.
Of course the same operation can be done in one simple operation using "reshape array" from the array palette. Check the online help. No loop needed at all!.
Your VI is also full of race conditions that can bite you due to abuse of local variables. Have a look at the image below. Your code does not guarantee that the local variable is read only after the corresponding terminal has received current data. There is a 50% change that you read a stale value! Dataflow can ensure proper execution order very easily. Just use wires instead of local variables and all parts of the code are immediately guaranteed to receive the correct and current value. Makes sense?
Message Edited by altenbach on 03-17-2007 07:29 PM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
reshapeFix.png 10 KB
Use_Wires.png 32 KB
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