Research on long-term post filtering based on LC3 and FPGA implementation
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 re-source 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 re-search results indicate that,although the current design outperforms the software architecture,there is still room for system perform-ance improvement through design optimizations using logic reorganization or pipeline techniques.
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