Patent Document ID: 5434947
Application ID: 08021364
Patent Status: 1

Claim One:
1. A method of speech coding comprising the steps of: receiving speech data; providing excitation vectors; generating filter coefficients for a combined short term and spectral noise weighting filter comprising the steps of: generating a Pth-order short term filter; generating an interim spectral noise weighting filter including a first F-order filter and a second Jth-order filter, each filter dependent upon said Pth-order short term filter, and generating coefficients for a Rth-order all-pole combined short term and spectral noise weighting filter using said Pth-order short term filter and said interim spectral noise weighting filter, where R&lt;P+F+J; filtering said received speech data; filtering said excitation vectors utilizing a long term predictor filter and said combined short term and spectral noise weighting filter, forming filtered excitation vectors; comparing said filtered excitation vectors to said filtered received speech data, forming a difference vector; calculating energy of said difference vector, forming an error signal; and choosing, using the error signal, an excitation code, I, representing the received speech data.