Method for generating additive combinations of pcm voice...

Details Method for generating additive combinations of pcm voice... Method for generating additive combinations of pcm voice...

H - Electricity

04

Q

344/14

H04Q 11/04 (2006.01) H04M 3/56 (2006.01)

Patent

CA 1310095

A METHOD FOR GENERATING ADDITIVE COMBINATIONS OF PCM VOICE SAMPLES ABSTRACT OF THE DISCLOSURE A method for generating additive combinations of PCM voice samples separates the samples into magnitude portions and sign portions. The magnitude portion of each PCM voice sample is converted from compressed PCM form to linear form. The magnitudes of the two voice samples, in linear form, along with their respective signs are added together to form a resultant linear value. If there is any overflow as a result of the addition, the resultant value is truncated so as not to exceed a maximum allowable value. The resultant value is then converted from linear form to compressed PCM form along with the proper sign. These steps are iterated for each possible value of the input PCM voice samples. There resultant values are stored in a storage medium for rapid on-line use by a switching system. Off-line generation of combined PCM samples saves system real time as compared to generating these combinations on-line in real time.

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