Dilithium Networks Pty Limited

Dilithium Networks, Inc.

Stephen Gould

Marwan Anwar Jabri

Jianwei Wang

A method for transcoding a CELP based compressed voice bitstream from source codec to destination codec. The method includes processing a source codec input CELP bitstream to unpack at least one or more CELP parameters from the input CELP bitstream and interpolating one or more of the plurality of unpacked CELP parameters from a source codec format to a destination codec format if a difference of one or more of a plurality of destination codec parameters including a frame size, a subframe size, and/or sampling rate of the destination codec format and one or more of a plurality of source codec parameters including a frame size, a subframe size, or sampling rate of the source codec format exist. The method includes encoding the one or more CELP parameters for the destination codec and processing a destination CELP bitstream by at least packing the one or more CELP parameters for the destination codec.

Transcoding method and system between CELP-based speech codes with externally provided status

An apparatus for processing CELP-based frames includes a first module for extracting a CELP parameter from a source codec, a second module coupled to the first module adapted to interpolate between a CELP parameter of the source codec and a destination codec, the CELP parameter being selected from a group consisting of a frame size, a subframe size, and a sampling rate, a third module coupled to the second module adapted to map the CELP parameter from the source codec to a CELP parameter of the destination codec, a fourth module coupled to the third module adapted to construct a destination output CELP frame based upon the CELP parameter from the destination codec, and a controller coupled the first, second, third and fourth modules, adapted to oversee an operation of the modules, adapted to receive instructions from an external application, and adapted to provide status information to the external application.

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Woollahra, Australia

Stephen Gould