G - Physics – 10 – L
Patent
G - Physics
10
L
G10L 19/02 (2006.01) G10L 19/12 (2006.01) H04J 1/08 (2006.01)
Patent
CA 2355194
An LPC analyzer 12 calculates an LPC coefficients from a speech signal input from an input terminal 10 through LPC analysis. An LPC coder 14 codes the LPC coefficients. An impulse response circuit 16 calculates an impulse response from the LPC coefficients obtained by the decoding. A band divider 18 divides the band of the impulse response. LPC analyzers 22 and 24 calculate each subband LPC coefficients. A band divider 20 divides the band of the input speech signs input from the input terminal 10 and produces each subband speech signal. Coders 26 and 28 code excitation signal by using the LPC coefficients and speech signal of each subband. A multiplexer 30 outputs each code as a modulation signal from an output terminal 32.
Corporation Nec
G. Ronald Bell & Associates
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