Abstract
The goal of this paper is to implement SPEEX speech compression technology on ARM processor. SPEEX is a speech compression technology based on the Code Excited Linear Prediction (CELP) algorithm. It has a low bit rate, high resolution, and supports a variety of signal sampling rates, so the voice can effectively compression and also preserve speech integrity. For hardware part, we abandon high cost, high power digital signal processors (DSPs), but we select the ARM processor of STM32 series produced by STMicroelectronics. SPEEX voice compression technology will be transplanted to the STM32 processor, and SPEEX encoded data transmitted through the transmitter to the receiver; and finally through the decoding side the encoded data is restored to playback. The experiment is divided into two parts. First through the SPEEX encoded sine wave signal, we input data to the ARM decoder, and use the oscilloscope to compare the difference after encoding and decoding signals. The other is through the PESQ for voice quality verification, and is compared with the traditional ADPCM voice quality.
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Chang, CC., Shih, YH. (2018). Design and Implementation of SPEEX Speech Technology on ARM Processor. In: You, I., Leu, FY., Chen, HC., Kotenko, I. (eds) Mobile Internet Security. MobiSec 2016. Communications in Computer and Information Science, vol 797. Springer, Singapore. https://doi.org/10.1007/978-981-10-7850-7_7
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DOI: https://doi.org/10.1007/978-981-10-7850-7_7
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