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Altera_Forum
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14 years ago

Quantization Problem...Help Please

Hi i'm working on a 2 Channel QMF perfect reconstruction Filter bank using a tutorial in Matlab and i'm trying to implement the design on a Cyclone II FPGA board. after setting everything up i notice...
Altera_Forum's avatar
Altera_Forum
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14 years ago

Software engineers (our friendly makers of wonderful tools) regard 1 as a loose representation in digits. In fact you can represent 1 as any suitable roof value. but truncation is all that is important to match the meaning. For example if your multiplicand is meant to be .3 then you can use .3*1024 = 307 representation, multiply by input then truncate 10 bits off result.

In your tool 1 means max hardware representation and 5 can't be understood by it !! in short the soft 1 = 2^n-1 hard 1