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基于PIC单片机的ADPCM编解码

更新时间:2019-12-08 10:46:06 大小:2M 上传用户:xuzhen1查看TA发布的资源 标签:pic单片机adpcm 下载积分:0分 评价赚积分 (如何评价?) 打赏 收藏 评论(1) 举报

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Table 4 shows the performance comparison of the ADPCM compression and decompression routines for the PIC16C5X PIC16CXXX. and PIC17CXXX family of devices assuming 80 additional instruction cycles for overhead. Any device with-

out a PWM module will have to increase the operating frequency to generate a software PWM. Table 4 also provides the minimum external operating frequency required to run the routines. The C code from Appendix C was used. The inputloutput data rate of the speech samples is 8.0 kHz. The minimum operating frequency is calculated as follows.

8000 x # of Total Instruction Cycles x4.

For example, the ADPCM encoding using the PIC16CXXX family would require an 8000 x (225 +80) x4-9.760 MHa external crystal


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  • 2022-09-02 00:45:09Go1

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