16Kb/s话音子带编码的单片DSP实现

Implementation of the 16Kbps Speech Subband Coder with a Single DSP

本文给出了一种实时的四子带SBC设计,描述了编码算法、硬件结构和程序设计.正交镜象滤波器组的多相实现有效地降低了计算的复杂度.基于单片TMS320C25的全双工硬件系统的实现,具有较好的话音质量.

This paper presents a four-band SBC design and describes the coding algorithm, the hardware architecture and the program design. The realization of the Quadrature Mirror Filter Banks by means of the polyphase form has effectively reduced the computational com-plexity. A full-duplex hardware system based on a single TMC320C25 is designed and proves to be of good speech quality.