Patent ID: 8942989
Filing Date: 2015-01-27
Classification: G10L

Abstract:
1. A speech coding apparatus, comprising: a transforming section, using a communication apparatus, that transforms input speech signals of a plurality of channels into principal-component signals, and calculates an inter-channel parameter every subband, the inter-channel parameter representing a relationship of inter-channel signals; a first coding section, using the communication apparatus, that encodes the principal-component signal to obtain a coded principal-component signal; a decoding section, using the communication apparatus, that decodes the coded principal-component signal to obtain a decoded principal-component signal; a deleting section, using the communication apparatus, that deletes a redundant parameter from the inter-channel parameter of the subband using energy of the decoded principal-component signal of the subband; and a second coding section, using the communication apparatus, that encodes the inter-channel parameter from which the redundant parameter is deleted.