Adder circuit for encoded pcm samples

Details Adder circuit for encoded pcm samples Adder circuit for encoded pcm samples

G - Physics

06

F

354/197

G06F 7/50 (2006.01) G06F 7/38 (2006.01)

Patent

CA 1244956

ADDER CIRCUIT FOR ENCODED PCM SAMPLES ABSTRACT A circuit which adds and subtracts pulse code modulation (PCM) samples in D2 format. An exponent sub- tractor determines the difference between exponents of the two PCM samples. A mantissa shifter circuit shifts the mantissa portion of a selected PCM sample to compensate for the difference in the exponents. A mantissa adder circuit adds or subtracts the mantissa portion of the shifted and unshifted PCM samples and a sign generator provides a sign value representative of the resultant added or subtracted PCM samples. A normalizer circuit ensures that the mantissa has a predetermined range of values.

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