| 摘要 |
A SOURCE-CONTROLLED VARIABLE BIT-RATE MULTI-MODE WIDEBAND (VMR- WB) CODEC, HAVING A MODE OF OPERATION THAT IS INTEROPERABLE WITH THE ADAPTIVE MULTIRATE WIDEBAND (AMR-WB) CODEC, THE CODEC COMPRISING: AT LEAST ONE INTEROPERABLE FULL-RATE (I-FR) MODE, HAVING A FIRST BIT ALLOCATION STRUCTURE BASED ON ONE OF A AMR-WB CODEC CODING TYPES; AND AT LEAST ONE COMFORT NOISE GENERATOR (ENG) CODING TYPE FOR ENCODING INACTIVE SPEECH FRAME HAVING A SECOND BIT ALLOCATION STRUCTURE BASED ON AMR- WB SID_UPDATE CODING TYPE. METHODS FOR I) DIGITALLY ENCODING A SOUND USING A SOURCE-CONTROLLED VARIABLE BIT RATE MULTIMODE WIDEBAND (VMR- WB) CODEC FOR INTEROPERATION WITH AN ADAPTATIVE MULTIRATE WIDEBAND (AMR-WB) CODEC, II) TRANSLATING A VARIABLE BIT RATE MULTI-MODE WIDEBAND (VMR- WB) CODECSIGNAL FRAME INTO AN ADAPTIVE MULTI-RATE WIDEBAND (AMR- WB) SIGNAL FRAME, III) TRANSLATING AN ADAPTIVE MULTI-RATE WIDEBAND (AMR- WB) SIGNAL FRAME INTO A VARIABLE BIT RATE MULTI-MODE WIDEBAND (VMRWB) SIGNAL FRAME, AND IV) TRANSLATING AN ADAPTIVE MULTI-RATE WIDEBAND (AMRWB) SIGNAL FRAME INTO A VARIABLE BIT RATE MULTI-MODE WIDEBAND (VMR-WB) SIGNAL FRAME ARE ALSO PROVIDED.
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