| 摘要 |
PURPOSE: A digital signal processor of an international mobile telecommunications-2000(IMT-2000) control station system is provided to process a Giga instructions per second(1GIPS) and to perform a multi-channel voice coder-decoder(CODEC) function, so as to process data even when one user occupies multi channels. CONSTITUTION: A multi-mode digital signal processor(DSP)(60) performs a DSP function relating to voice data with a multi-voice compressing mode. A buffer(40) buffers the voice data processed in the multi-mode DSP(60). A data transceiver(30) transceives voice data for being voice-compressed. The multi-mode DSP(60) comprises as follows. A first DSP(61) processes the voice data with a qualcomm code excited linear prediction(QCELP) voice compressing mode. A second DSP(62) processes the voice data with an enhanced variable rate vocoder(EVRC) voice compressing mode. A third DSP(63) processes the voice data with a conjugate-structure algebraic code excited linear prediction(CS-ACELP) voice compressing mode.
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