Abstract: In accordance with one aspect of the invention, a selector supports the selection of a first encoding scheme or the second encoding scheme based upon the detection or absence of the triggering characteristic in the interval of the input speech signal. The first encoding scheme has a pitch pre-processing procedure for processing the input speech signal to form a revised speech signal biased toward an ideal voiced and stationary characteristic. The pre-processing procedure allows the encoder to fully capture the benefits of a bandwidth-efficient, long-term predictive procedure for a greater amount of speech components of an input speech signal than would otherwise be possible. In accordance with another aspect of the invention, the second encoding scheme entails a long-term prediction mode for encoding the pitch on a sub-frame by sub-frame basis.

Abstract: There is provided a multi-core system that includes a lower-subsystem including a first processor and a number of slave processing cores. Each of the slave processing cores can be a coprocessor or a digital signal processor. The first processor is configured to control processing on the slave processing cores and includes a system dispatcher configured to control transactions for execution on the slave processing cores. The system dispatcher is configured to generate the transactions to be executed on the slave processing cores. The first processor can include a number of hardware drivers for receiving the transactions from the system dispatcher and providing the transactions to the slave processing cores for execution. The multi-core system can further include an upper sub-system in communication with the lower-subsystem and including a second processor configured to provide protocol processing.