基于ADPCM技术的合成语音芯片设计
ADPCM-based design of synthetic voice chips
摘要
文章作者完成了一种基于自适应差分脉冲编码调制(ADPCM)技术的合成语音芯片的研究与设计,首先将压缩的ADPCM格式的语音信号进行解码,然后利用脉冲宽度调制(PWM)技术将解码后的信号转化为PWM波,直接驱动喇叭发出声音。与传统的采用权电流数/模转换进行合成语音输出的方式相比,该语音输出方式具有输出功耗小、工艺适应能力强和设计稳定可靠等优点。
Abstract
In this article,ADPCM-based study and design of synthetic voice chips are completed. The voice signals of the compressed ADPCM format are first decoded and then the decoded signals are translated into a Pulse Width Modulation (PWM) wave, directly driving the speaker to produce sounds. Compared with the traditional way of synthetic voice output by using weight current D/A conversion, the proposed approach has such advantages as small power consumption, stronger technological adaptability and stable and reliable design.
参考文献
[1] . An oversampled digital PWM linearization technique for digital-to-analog conversion[J]. Circuits and Systems I: Regular Papers,IEEE Transactions on, 2004, 9(51): 1.
[2] Jan P H van Santen(美). 语音合成 [M].北京:机械工业出版社,2005.
[3] Bhasker J (美).Verilog HDL综合实用教程 [M].北京:清华大学出版社,2004.
[4] 朱正涌.半导体集成电路 [M].北京:清华大学出版社,2001.
殷严刚, 唐宁, 周松青. 基于ADPCM技术的合成语音芯片设计[J]. 光通信研究, 2008, 34(3): 57. Yin Yangang, Tang Ning, Zhou Songqing. ADPCM-based design of synthetic voice chips[J]. Study On Optical Communications, 2008, 34(3): 57.