| 摘要 |
<p>A universal CODEC, in one implementation, comprised of multiple CODECs in a bank, each CODEC capable of encoding/decoding speech transmissions in a different format, replaces a customary installation of two CODECs in a BSC/MSC. Within the universal CODEC, a bypass feature is incorporated that is capable of automatically selecting the individual CODEC having a format that is appropriate to a received signal. A BSC/MSC with a universal CODEC may receive any encoded voice signal and convert to the format appropriate to the receiving BSC/MSC. A second implementation of the universal CODEC utilizes multiple software applications and shares a common digital signal processor (DSP) core. Utilizing an automatic bypass feature and low frequency, in-band signals, the universal CODEC provides means to consume less bandwidth while transmitting speech signals only in compressed format through packet switching networks. <IMAGE></p> |
