Method and system for coding an information signal using pitch delay contour adjustment

摘要

In a speech encoder/decoder a pitch delay contour endpoint modifier is employed to shift the endpoints of a pitch delay interpolation curve up or down. Particularly, the endpoints of the pitch delay interpolation curve are shifted based on a variation and/or a standard deviation in pitch delay.

主权项

1. A method of operating a speech encoder, the method comprising the steps of:
estimating a pitch delay based on an input signal; estimating a variation in pitch delay based on the pitch delay estimate; determining a pitch delay adaptive step size value based on the estimated variation in pitch delay; determining a pitch delay adjustment value based on the pitch delay adaptive step size; and generating an encoded pitch parameter based on the pitch delay adjustment value.