Speech encoder using a soft interpolation decision for spectral

Details Speech encoder using a soft interpolation decision for spectral Speech encoder using a soft interpolation decision for spectral

1992-09-14

1993-11-23

MacDonald, Allen R.

G01L 902

Patent

active

052652190

ABSTRACT:
A speech encoder uses a soft interpolation decision for spectral parameters. For each frame, the encoder first calculates the residual energy for interpolated spectral parameters, and then calculates the residual energy for non-interpolated spectral parameters. The encoder then compares these residual energy calculations. If the encoder determines that the interpolated spectral parameters yields the lowest residual energy, it indicates to a far-end decoder to use the interpolated values for the current frame. Otherwise, it indicates to the far-end decoder to use the non-interpolated values for the current frame. The encoder signals the far-end decoder as to which spectral parameters (interpolated or non-interpolated values) to use by encoding and transmitting a special signalling bit.

REFERENCES:
patent: 4710959 (1987-12-01), Feldman et al.
patent: 4868867 (1989-09-01), Davidson et al.

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