Audio Signal Processing using TMS320C6713

I have recently started using TMS320C6713 and am trying to start an speech recognition project for which i have to input 3 different audio words. I am not being able to understand in which format or how will i able to store this audio signal in tms kit so as to further process it. Any help would be highly appreciated.

To any controller, the language known is binary or hexadecimal. Thus we need a number system by which we can convert our floating point numbers to hexadecimal format.
Since your DSP is a 32 bit fixed point processor, we follow the 8.24 format of representing floating numbers.
The first 8 bits are for integral part, while the last 24 bits are for decimal part.
Of the first 8 bits, the first bit is reserved for sign, i.e., if it is 1, number is negative and if 0, number is positive.

Thus we can represent any number between -128 to 127 using this format.
To represent any floating number, the mathematics involved is:

8.24 Hex = Hex of( number_in_float * (2^24) )
Eg.
Number in float = 0.25
Hex of ( 0.25 * 2^24) = Hex of ( 4194304) = 400000
Similarly for -0.25 we get FFC00000

For the reverse process, i.e., to get float from 8.24 hex, use the below mathematics:
Float = (decimal of(number in hex))/ (2^24)

Eg 0x00A01456 gives 0.625310301780701


32 Bit Multiplication

If we multiply two 8.24 hexadecimal numbers, we get a 64 bit output. To convert this output to the desired 32 bit 8.24 format, remove the first 8 bits and last 24 bits of the obtained output


Hope this helps..
Utkarsh Mathur