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identifying file format of ITU test vectors

I am working on ITU G.723.1 Codec implementation on DSK 6713 with CCS v3.1.

for this i have to satisfy test vectors of respective codec.

for this i need to know file format of respective test vectors .

are they in ASCII or Binary format or some other ?

As i open them in notepad , only special characters shows randomly.

Waiting for advice....