基于LC3的长时后置滤波器研究及其FPGA实现  

Research on long-term post filtering based on LC3 and FPGA implementation

作　　者：李镔 王法翔[1] LI Bin;WANG Faxiang(College of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学物理与信息工程学院,福州350108

出　　处：《集成电路与嵌入式系统》2025年第1期74-80,共7页Integrated Circuits and Embedded Systems

摘　　要：基于LC3编码协议,详细探讨了长时后置滤波器(LTPF)的硬件设计与实现。研究内容包括LTPF的基本原理、硬件设计架构及其在FPGA上的实现和测试。通过使用Altera(已被英特尔收购)MAX 10开发板进行了验证,结果显示,硬件实现显著提高了处理效率,并在较低资源消耗下实现了LTPF的硬件加速功能。此外,本文还将硬件实现与STM32平台上的C语言定点程序进行了对比,展示了硬件设计在处理速度和资源利用上的优势。研究结果表明,尽管当前设计已优于软件架构,但未来通过逻辑重组或流水线技术对设计进行优化,系统性能还有提升空间。This paper explores the hardware design and implementation of a Long-Term Post Filter(LTPF)in detail based on the LC3 encoding protocol.The research includes an exploration of the fundamental principles of LTPF,the hardware design architecture,and its implementation and testing on FPGA.The design is validated using an Altera(acquired by Intel)MAX 10 development board.The results demonstrate significant improvements in processing efficiency and achieve hardware acceleration of the LTPF with minimal resource consumption.Additionally,a comparison is made between the hardware implementation and a C-language fixed-point program on the STM32 platform,highlighting the advantages of the hardware design in terms of processing speed and resource utilization.The research results indicate that,although the current design outperforms the software architecture,there is still room for system performance improvement through design optimizations using logic reorganization or pipeline techniques.

关 键 词：音频编解码器 LC3 基音检测 自相关函数 LTPF 基音周期 FPGA 

分 类 号：TN912.3[电子电信—通信与信息系统]