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16 …e CMSIS-DSP Python wrapper and how it can help translating a float algorithm to a fixed point one …
24 …"The CMSIS-DSP package must first be installed. This command will take some time to execute since …
114 …"test_pattern_url=\"https://github.com/ARM-software/VHT-SystemModeling/blob/main/EchoCanceller/sou…
143 "application/vnd.jupyter.widget-view+json": {
207 …g/0v/UP+CAFT/cf/F/wv/sP7l//H+iACo/h3/3v77/u/+q/+s/jP/2P57ALr/fP8WAFsA5P9PAOn+CwD8/oAADAEOALn/wv8tA…
266 …InDxebmGp7rjjXPxnAlabXwikAPjNV16kAzhGRtqbafg6Aqea5z0XkFPO+XOk2VqPOUZaN76lj+0G/f9m2kTcRGQ7gPwGMUNVd…
300 "winDuration=30e-3\n",
301 "winOverlap=15e-3\n",
366 " w = window - np.mean(window)\n",
371 " if signal_energy(window)>-11:\n",
405 …RqX1d3CpERn+bayJ0BvXaN24VPPFrCKYCp4nIUmCcs46I1IvIHa07icgQYCDwj6zjfyciC4GFQG/g+z71qXrcjqGHLj0hNj2Md…
431 "### CMSIS-DSP Q15 implementation"
439 "The same functions but in q15 and using CMSIS-DSP API."
451 " window=dsp.arm_offset_q15(window,-mean)\n",
453 " # Energy is not in q15 (refer to CMSIS-DSP documentation)\n",
467 " if signal_energy_q15(window)>fix.toQ15(-0.38):\n",
478 …ormat of the power function is also not q15 (the formats are described in CMSIS-DSP documentation)"
525 "### CMSIS-DSP Q31 Implementation"
537 " window=dsp.arm_offset_q31(window,-mean)\n",
539 " # Energy is not in q31 (refer to CMSIS-DSP documentation)\n",
544 " elif scaled < -0x80000000:\n",
545 " energy=-0x80000000\n",
560 " if signal_energy_q31(window)>fix.toQ31(-0.255):\n",
704 …g/3j/Bf8yASkBq//M/14BXwH//4IA5f8CAZf/XADg/vgAvgBg//T/IAAWAA8Bof4X/0T/Sf+HAE3/bP/D/wH/ov7k/+b+jQCa/…
759 " self._padding_left=(self._fftLen - self._windowLength)//2 \n",
760 " self._padding_right=self._fftLen- self._windowLength-self._padding_left\n",
803 " energy = v * np.conj(v) + 1e-6\n",
805 " scaling = (energy - self._noise)/energy\n",
881 …N0rrfEDClAikaq6fD5GGpEQg3Wa5OoZuLLpEIGFKBCIiOadEIJJDquaTMCUCkTxSHpAQJQKRQJ5+G/P0WqVzSgQiIjkXKRGY2S…
919 …G/60MBtAkz+wrq0+rg+S0C9foI81341wZDC3sBv/Ub+D4GBBZxGaYQwAFj/b8JUB16JTQa+QpQB7oSmRx4HCsVvREWEzQV9hHx…
943 "### CMSIS-DSP Implementations"
951 … to Q15. The CMSIS-DSP functions are not used for this conversions because it is assumed that this…
962 …G/u98icD33fph+umlQR2F3cVduiLRKx+WQqakwEFsnVK+PzS9bhZ1MWhRdMAaq378YT8z6KOoxA2dZRWpCG3PsaFgZwxTL/w2j…
999 …g/3j/Bf8wASgBq//M/1wBXQH//4AA5f8AAZf/WwDf/vcAvQBg//P/HgAVAA4Bof4X/0P/Sf+FAE3/a//D/wH/ov7k/+b+jACa/…
1023 …"Utilities functions since there is no specific datatype for complex in CMSIS-DSP. An array of com…
1048 "#### CMSIS-DSP F32 noise suppression algorithm"
1076 " energy = dsp.arm_offset_f32(energy,1e-6)\n",
1163 …R5aHuvxuWZL/5WMqQ11/lEy60EhmYPInT0f0825q2ad7+CWq033OCoJgU62Prbn/klGDdYdgLCZ/g/Us09sHiF+Vk02JM2xXnB…
1193 …G/60MBtAkz+wrq0+rg+S0C9foI81341wZDC3sBv/Ub+D4GBBZxGaYQvwFj/b8JUB16JTQa+QpQB7oSmRx4HCsVvREWEzQV9hHx…
1217 "#### CMSIS-DSP Q31 noise suppression algorithm"
1249 " # Used for computing the division (energy - noise) / energy\n",
1253 " # The scaling factor (energy - noise) / energy is computed\n",
1255 " # We assume that |energy-noise|<=energy\n",
1379 …G/TMAVAHz/QX56/YY+ST+fAHK/9H5M/Ux9zj9EQB3/oT7kf3M/cL4AvD78OL9xwikAlruXeHE6z0BuQkw+wXq1ura+TAC9PoG8…
1403 "#### CMSIS-DSP Q15 noise suppression algorithm"
1440 " self._noise_status = -1 \n",
1454 …" # So we remove the scaling from the values before computing the ratio (energy-noise)/ener…
1473 " # The scaling factor (energy - noise) / energy is computed\n",
1475 " # We assume that |energy-noise|<=energy\n",
1508 " status = -1\n",
1640 …X6tvo5WTRv6+pAPIoqnc04s8XydXiSChQB6ikg3JA7iIwF8I2meCgCjkSj7HwFgjqqqiFQAeFpE/g+Jm8U9AUS30/0cvH3XRVi…
1670 …G//k//v/rQDEAA8AHAG2/wQAUwErAYcAHv9PAe//M/+W/1X/ov8mABABRwENARgALP9mAUsAS/8z/wIBJwHoAEMAgv/gAF3/6P…
1743 …G/7bQL0CpsHLf709Qr1FvgA+QD5QvaF85vyQe+87dLsvO0r8Pnvh/DK7Rrr4ulK7Yr0k/pF+u7zcvD09J/9MwQlBMMB+/1MAN0…
1775 …de is working, the C code should be easy to write since the API of the CMSIS-DSP Python wrapper is…
1788 "energy = dsp.arm_offset_f32(energy,1e-6)\n",
1820 "arm_offset_f32(energy,1e-6,energy,windowLength);\n",
1854 "mimetype": "text/x-python",