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US 6,643,618 B2Granted
Speech decoding unit and speech decoding method
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsBunkei Matsuoka, Hirohisa Tasaki
Life of this patent
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Abstract
A speech decoding unit estimates coding parameters of a speech pause by carrying out smoothing algorithm of the coding parameters by using a coding parameter xref constituting far-end talker background noise information extracted by a parameter extracting circuit 12, and a coding parameter xn used for synthesizing the previous background noise.
Claims13
A speech decoding unit comprising:
- extracting means for extracting coding parameters from a speech code sequence;
- detecting means for detecting a speech pause by supervising the speech code sequence;
- estimating means for estimating, when said detecting means detects the speech pause, coding parameters of the speech pause by carrying out a smoothing algorithm of coding parameters constituting far-end talker background noise information extracted by said extracting means and coding parameters used for synthesizing previous background noise;
- and
- synthesizing means for synthesizing background noise in the speech pause from the coding parameters estimated by said estimating means.
2 more elements
A speech decoding method comprising the steps of:
- detecting a speech pause by supervising a speech code sequence;
- estimating, when the speech pause is detected, coding parameters of the speech pause by carrying out a smoothing algorithm of coding parameters by using coding parameters constituting far-end talker background noise information extracted from the speech coding sequence and coding parameters used for synthesizing previous background noise;
- and
- synthesizing background noise in the speech pause from the coding parameters estimated.
1 more element
Dependencies are inferred from the claim text.