Coding apparatus having adaptive coding at different bit...

Details Coding apparatus having adaptive coding at different bit... Coding apparatus having adaptive coding at different bit...

G - Physics

10

L

G10L 19/06 (2006.01) G10L 11/04 (2006.01) G10L 19/00 (2006.01)

Patent

CA 2159557

The coding apparatus comprises an adaptive codebook storing excitation signals as vectors, a synthesis filter for forming a synthesis signal, referring to the vectors stored in the adaptive codebook, a similarity computation circuit for computing a similarity between the synthesis signal obtained by the synthesis filter and a target signal, and a coding scheme determining circuit for deciding one coding scheme from a plurality of coding schemes respectively having coding bit rates different from each other, on the basis of the similarity obtained by the similarity computation circuit.

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