Speech Processing apparatus and mobile communication terminal
First Claim
1. A speech processing apparatus for enhancing formant components of speech comprising:
- a calculating function unit which calculates a distance between adjacent orders of linear spectrum pairs of a speech signal, an adjusting function unit which adjusts the linear spectrum pairs so that a distance between linear spectrum pairs of adjacent orders closer in distance become closer, and an outputting function unit which combines and outputs a speech signal based on the adjusted linear spectrum pairs.
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Accused Products
Abstract
A speech processing apparatus able to enhance formants more naturally, wherein a speech analyzing unit analyzes an input speech signal to find LPCs and converts the LPCs to LSPs, a speech decoding unit calculates a distance between adjacent orders of the LSPs by an LSP analytical processing unit and calculates LSP adjusting amounts of larger values for LSPs of adjacent orders closer in distance by an LSP adjusting amount calculating unit, an LSP adjusting unit adjusts the LSPs based on the LSP adjusting amounts such that the LSPs of adjacent orders closer in distance become closer, an LSP-LPC converting unit converts the adjusted LSPs to LPCs, and an LPC combining unit uses the LPCs and sound source parameters to obtain formant-enhanced speech.
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Citations
8 Claims
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1. A speech processing apparatus for enhancing formant components of speech comprising:
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a calculating function unit which calculates a distance between adjacent orders of linear spectrum pairs of a speech signal, an adjusting function unit which adjusts the linear spectrum pairs so that a distance between linear spectrum pairs of adjacent orders closer in distance become closer, and an outputting function unit which combines and outputs a speech signal based on the adjusted linear spectrum pairs. - View Dependent Claims (2, 3, 4)
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5. A mobile communication terminal comprising:
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a converting function unit which converts a wireless frequency signal to a baseband signal, an extracting function unit which decodes speech parameters from speech encoding parameters of the baseband signal to extract linear spectrum pairs and sound source parameters, a calculating function unit which calculates a distance between adjacent orders of extracted linear spectral parameters, an adjusting function unit which adjusts the linear spectrum pairs so that the distance between the linear spectrum pairs of adjacent orders closer in distance become closer, and a combining and outputting function unit which combines and outputs a speech signal based on the adjusted linear spectrum pairs and sound source parameters. - View Dependent Claims (6, 7, 8)
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Specification