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My AI study

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# wmt_ai_study
My AI study  
```
弃身锋刃端，性命安可怀？父母且不顾，何言子与妻！  
名编壮士籍，不得中顾私。捐躯赴国难，视死忽如归！  
——曹植《白马篇》  
```

## Recorder code work  
see https://github.com/weimingtom/wmt_recorder_study

## Wireless code work  
see https://github.com/weimingtom/wmt_iot_study

## TFLite work  
* test_ac5_stm32f411re_vv15_benchmark.rar  
(STM32) with STM32CubeMX, with Keil MDK5 AC5, without C++11, with NUCLEO-F411RE, 84MHz, 1000 times loop, 547 seconds  
(stm32cubemx) Heap_Size==0x13000, Stack_Size==0x6000      
(TODO) inline RuntimeShape GetTensorShape(std::vector<int32_t> data)  
(VC2013 version, Windows, 1000 times loop, 61 seconds) micro_speech_vv14_success.rar  
(origin) https://github.com/boochow/TFLite_Micro_MicroSpeech_M5Stack  
(origin, Arduino IDE) search baidupan, TFLite_Micro_MicroSpeech_M5Stack  
(origin, Linux, Raspberry Pi OS Desktop 2017) search baidupan, Blink_esp32_rpd2017_v2_success.tar.gz  
(origin, Linux add -std=c99 and -std=c++11, like Blink_esp32_rpd2017_v2_success) Blink_esp32_ubuntu140432_v3_success.tar.gz  
https://github.com/tensorflow/tensorflow/releases/tag/v2.0.0  
https://github.com/tensorflow/tensorflow/tree/v2.0.0/tensorflow/lite/experimental/micro/examples/micro_speech  
(dead) https://github.com/tensorflow/tensorflow/tree/master/tensorflow/lite/micro/examples/micro_speech  
(migrate to) https://github.com/tensorflow/tflite-micro/tree/main/tensorflow/lite/micro/examples/micro_speech  
search baidupan, tensorflow-2.0.0.zip  
* (TODO) Port to STM32H743  
(TODO, NOT DONE) microspeech_stm32h743vi_v7_no_crash_with_lib.rar  
(TODO, NOT DONE, inmp441 stm32h743 test) test_ac6_stm32h743vi_v2_dma_bug.rar  
DMA is not working on STM32H7 devices  
https://community.st.com/s/article/FAQ-DMA-is-not-working-on-STM32H7-devices  
* micro_speech_v7_tf200_single_file.rar  
(ESP32) with Arduino IDE, and Ai-Thinker NodeMCU-32S + INMP441  
(origin) https://github.com/boochow/TFLite_Micro_MicroSpeech_M5Stack  
* micro_speech_v5_tf211_lib.zip  
(ESP32) with Arduino IDE, and Ai-Thinker NodeMCU-32S + INMP441  
(origin) https://github.com/tanakamasayuki/Arduino_TensorFlowLite_ESP32  
(origin) examples/micro_speech_M5StickC/micro_speech_M5StickC.ino  
(origin) with Arduino IDE and M5StickC 2020    
* blink_v2_micro_speech_success.tar.gz  
(ESP32) with esp-idf-v3.3.4, and Ai-Thinker NodeMCU-32S + INMP441  
(origin) from boochow version, TensoFlow Lite Micro 2.0.0, single file compile    
* (TODO) https://gitee.com/tutuwin/xr872_-audio  
https://gitee.com/tutuwin/xr872_-audio/blob/master/audio_record.c  
model_process
* (done) 在GD32F450上运行tflite的micro speech demo  
https://github.com/newffnow/gd32f450-run-tflite-micro-speech-demo  
https://www.bilibili.com/video/BV1dq4y1t74i  
https://github.com/newffnow/gd32f450-run-tflite-micro-speech-demo/blob/main/GD32F4xx_Firmware_Library_V2.1.3/Utilities/Third_Party/tensorflow_keil/tensorflow/lite/micro/examples/micro_speech/main.cc  
https://github.com/newffnow/gd32f450-run-tflite-micro-speech-demo/blob/main/GD32F4xx_Firmware_Library_V2.1.3/Utilities/Third_Party/tensorflow_keil/tensorflow/lite/micro/examples/micro_speech/audio_provider_mock.cc  
https://github.com/newffnow/gd32f450-run-tflite-micro-speech-demo/blob/main/GD32F4xx_Firmware_Library_V2.1.3/Template/Keil_project/Project.uvprojx  
search baidupan, work_gd32_tflite  
search baidupan, gd32_tflite_speech  
see below, successfully done, see gd32f450-run-tflite-micro-speech-demo  
search micro_speech_v3_O3_success_liangshan_mdk5_ac6.7z  
* (1000 loop no microphone done) NXP RT1020 EVK (MIMXRT1020-EVK)  
https://github.com/weimingtom/rt1020-evk-playground  
(origin, tflite-micro 2.4.0) https://github.com/KeilChris/TensorFlow_MIMXRT1064-EVK_Microspeech  
(origin) KeilChris_TensorFlow_MIMXRT1064-EVK_Microspeech-master.zip  
(test run on Linux) sai_ubuntu140432_umips_v1_success.tar.gz  
https://www.nxp.com/design/design-center/development-boards-and-designs/i-mx-evaluation-and-development-boards/i-mx-rt1020-evaluation-kit:MIMXRT1020-EVK    
(x) EVK-MIMXRT1020-sai_v6_failed_只能运行半个setup.7z  
(x) EVK-MIMXRT1020-sai_v8研究不下去.rar, 卡在一个逻辑问题上, a verctor (for model) size == 0 in MicroAllocator::GetSubGraphFromModel    
(x) EVK-MIMXRT1020-sai_v12_failed_output_log_need_malloc.rar  
(done) EVK-MIMXRT1020-sai_v13_done.rar  
```
1000 loop about 13sec  
Program Size: Code=134412 RO-data=135500 RW-data=572 ZI-data=181192

我测试过如果要用RT1020-EVK跑通无麦克风硬件输入的tflm 2.4 micro_speech例子，
大概需要flash是263k，
SRAM是177k，1000循环大概13秒（我估算的，可能不准确）
我是用MDK5的AC6编译器O3优化和打开LTO开关（相当于开着LLVM优化？），
所以可能用RT1010-EVK不够内存跑通这份代码（不确定，纯猜测）
```
* (1000 loop no microphone done) NUCLEO-H743ZI2  
https://github.com/weimingtom/nucleo-h743zi2_playground  
h743_inmp441_v2_run_tflm_no_mic_success.rar  
```
1000 loop about 13sec  
Program Size: Code=97232 RO-data=95436 RW-data=36 ZI-data=38660

串口不用接，默认被连接到st-link的虚拟串口上
usart3, TX, PD8(not need), USART3_TX
usart3, RX, PD9(not need), USART3_RX

INMP441
SCK,WS,LR
[===]xxxxxxRRRRR
SD,VDD,GND

INMP441<->STM32F446
SCK(left top 1)<->SAI1_SCK_B, PF8 (left 4 bottom 4)
SD(right top 1)<->SAI1_SD_B, PE3 (left 4 bottom 5)
WS(left top 2)<->SAI1_FS_B, PF9 (left 4 bottom 2)
VDD(right top 2)<->3.3(left 3 top 4)
L/R(left top 3)<->GND
GND(right top 3)<->GND(left 3 top 7)
```
* (done, 1000 loops 27 seconds) d133cbs, with luban-lite/rt-thread      
https://github.com/weimingtom/d133cbs_playground  
see helloworld_v8_final_success.7z  
(x) helloworld_v2_failed.7z  
using artinchip_20240203_luban-lite-master.zip  
(TODO) but some other codes not run well, see helloworld_v3.1_no_recog_output.7z  
```
终于，我把artinchip的d133cbs跑通了tflm 2.4.0 micro_speech了，一度想放弃，
后来发现可以通过注释INIT_APP_EXPORT(lvgl_thread_init);来节省内存使用，
这样就能跑起来（运行的时候屏幕会显示彩色格子而非LVGL表盘），
比较过和h743的输出结果相同，1000次循环时间大概是27秒，
相当于stm32h743的2倍（13秒），不过也难怪，
因为这是同时运行了rt-thread的其他线程，可能实际还能更快，
相关代码我有空会开源到gh上
```
* (TODO) How to use cmsis-nn with tflm ???  
see https://github.com/QingChuanWS/TensorflowLiteMicro/blob/scons/tensorflow/lite/micro/SConscript  
see https://github.com/QingChuanWS/TensorflowLiteMicro/tree/scons/tensorflow/lite/micro/kernels/cmsis-nn  
(TODO, IMP) and read the doc  
https://github.com/QingChuanWS/TensorflowLiteMicro/blob/scons/docs/api.md  
https://github.com/QingChuanWS/TensorflowLiteMicro/blob/scons/docs/user-guide.md

## TFLite micro esp32, MSM261S4030H0R    
* search baidupan, tflite-micro-esp-examples-master_v2_test_esp32_one_success.rar  
* (TODO) https://github.com/espressif/tflite-micro-esp-examples  
https://github.com/espressif/esp-nn  
https://github.com/dhdhxji/ESP32-LyraT-tf_command-recognition  
* (TODO) https://github.com/tensorflow/tflite-micro-arduino-examples  
* (TODO) https://github.com/tensorflow/tflite-micro  
https://github.com/tensorflow/tflite-micro/tree/main/third_party/xtensa/examples/micro_speech_lstm  
* https://github.com/eloquentarduino/EloquentTinyML  
* https://github.com/tanakamasayuki/Arduino_TensorFlowLite_ESP32  
* https://github.com/edgeimpulse/tflite-micro-esp-examples/tree/master/examples/micro_speech

## (TODO) TFLite micro ARM, NXP MIMXRT1050-EVKB or Arm虚拟硬件(AVH)    
* https://github.com/ARM-software/AVH-TFLmicrospeech

## (TODO) ArduCAM/pico-tflmicro, ArduCam Pico4ML        
* https://github.com/AustenBrooks/wake-word-detection  
* https://github.com/ArduCAM/pico-tflmicro  
* https://github.com/raspberrypi/pico-tflmicro

## TinyML: 基于TensorFlow Lite在Arduino和超低功耗微控制器上部署机器学习  
* TinyML: Machine Learning with TensorFlow Lite on Arduino and Ultra-Low-Power Microcontrollers  
* https://www.oreilly.com/library/view/tinyml/9781492052036/  
* https://github.com/tensorflow/tflite-micro

## ML-KWS work  
* mlkws_stm32f411re_v8_first_success.rar  
(STM32) with STM32CubeMX, Keil MDK5 AC6 and NUCLEO-F411RE   
(stm32cubemx) Heap_Size==0x12000, Stack_Size==0x6000      
(DONE, SUCCESS, same result as mbed-cli) port to Keil MDK5 AC6 project  
(Dependency, using CMSIS version) search baidupan, CMSIS_5-5.4.0.zip    
https://github.com/ARM-software/CMSIS_5/releases/tag/5.4.0  
small change in CMSIS_5\CMSIS\Core\Include\core_cm4.h  
```
//__FPU_PRESENT=1,
//#warning "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)"
//#define __FPU_USED       0U
#if !defined(__FPU_PRESENT)
#define __FPU_PRESENT 1
#endif
#define __FPU_USED       1U
```  
《嵌入式系统案例教程》第3章FPU，硬浮点和__FPU_PRESENT和__FPU_USED，在system_stm32f4xx.c，  
需要全局定义__FPU_PRESENT和__FPU_USED，  
见void SystemInit(void)函数。在stm32f429xx.h中有__FPU_PRESENT=1的宏定义，  
或者在Keil 5的Floating Point Hardware中选择Use Single Precision  
会产生__FPU_USED=1的宏定义    
stm32f429属于Cortex-M4F架构，所以有FPU  
* simple_test_v3_stm32f411ce_run_success.rar  
(STM32) with mbed-cli and NUCLEO-F411RE   
(origin) https://github.com/ARM-software/ML-KWS-for-MCU/tree/master/Deployment  
running output result:    
```
Total time : 164061 us  
Detected right (99%)  
Total time : 164060 us  
Detected right (99%)  
```  
* NEW Keyword spotting for Microcontrollers   
https://github.com/ARM-software/ML-examples  
(deprecated) https://github.com/ARM-software/ML-examples/tree/master/tflu-kws-cortex-m  
(old backup) https://github.com/weimingtom/ML-examples/tree/master/tflu-kws-cortex-m

## Speech-Recognition Python work  
* https://github.com/weimingtom/Speech-Recognition_mod  
work  
* Speech-Recognition-master_v3_success.tar.gz  
(Python3, TF2) With Tensorflow 2.x and xubuntu-20.04-desktop-amd64  
Keyword speech recognition, Speech commands, CNN, 10 words  
(install tf2) pip3 install tensorflow-cpu (if in xubuntu, use pip3 and python3)  
(origin) https://github.com/iamlekh/Speech-Recognition   
* Speech-Recognition_v7.tar.gz  
(Python3, TF2) with AI Studio, not done    
(install tf2) pip install tensorflow-cpu (if in AIStudio, use pip and python)

## (TODO, porting difficult) voice_control_led, Maixduino MFCC-DTW + VAD (stm32-speech-recognition like)    
* voice_control_led_v9.rar  
(NOT DONE, Many Problems) TODO, with VS2013, windows port, calculate DTW distance get zero, don't know reason    
(TODO, need DOC) about fft, see yinxiangbiji  
* voice_control_led_en_v2_success.rar    
for Maixduino, with Arduino IDE and Sipeed Maix Dock (K210)  
(origin) Maix_Speech_Recognition    
https://github.com/sipeed/Maixduino/blob/master/libraries/Maix_Speech_Recognition  
examples/voice_control_led_en/voice_control_led_en.ino  
examples/get_voice_model/get_voice_model.ino

## (TODO) stm32-speech-recognition, STM32 MFCC-DTW + VAD  
* stm32-speech-recognition_v3.rar  
(origin) https://github.com/gk969/stm32-speech-recognition    
(origin) with STM32F103VE and Keil MDK4 
* (TODO) migrate to STM32CubeMX MDK5 project, and run

## (TODO, NOT IMP) cortex-m-kws, aid_speech, tengine-lite  
**NOTE**: This demo may be not good,  
because of **lack of training method and model data**，only providing model convert tool    
Details see:   
https://github.com/OAID/cortex-m-kws/blob/master/Documentation/Tengine%20on%20STM32F7%20Setup%20Manual.pdf  
Tengine provides three versions:  
a) https://github.com/OAID/Tengine version (only arm)  
b) http://www.eaidk.com version (EAIDK-310, EAIDK-610)  
c) http://www.tengine.org.cn version (rpi3b, rk3399, hi3516, etc)  
* with STM32F469I-DISCO  
https://github.com/OAID/cortex-m-kws  
https://github.com/OAID/Tengine/tree/tengine-lite  
MCU AI开发者的福音 OPENAILAB发布Tengine-Lite预览版与关键词识别“小智”  
https://zhuanlan.zhihu.com/p/68938575  
https://blog.csdn.net/weixin_43476455/article/details/90401914  
* with NMSIS and RISC-V  
https://gitee.com/Nuclei-Software/NMSIS  
Tengine成功打通RISC-V芯片架构的AI部署与推理，或撼动AI推理格局  
https://zhuanlan.zhihu.com/p/266978046

## (TODO) KWS_MCU, TC-ResNet8  
https://github.com/Alex-Riviello/KWS_MCU

## (TODO???) UT2UH/ML-KWS-for-ESP32  
https://github.com/UT2UH/ML-KWS-for-ESP32  
xtensa_copy_q7 ???????where????????  
https://github.com/UT2UH/ML-KWS-for-ESP32/tree/master/Source/XMSIS/NN

## (TODO) VAD  
* https://github.com/Baidu-AIP/speech-vad-demo  
* https://github.com/LH-YU/SpeechVadDemo  
* https://github.com/wiseman/py-webrtcvad  
* https://github.com/mengsaisi/VAD_campare   
* https://github.com/jjzhang166/aicontroler/blob/master/aicontroler/src/record.c  
* https://github.com/bekencorp/bk7251_rtt_audio_sdk/blob/master/beken378/func/vad/vad_core.c

## (TODO) Python GMM Chapter07 speech_recognizer.py  
* origin  
https://github.com/PacktPublishing/Python-Machine-Learning-Cookbook/blob/master/Chapter07/speech_recognizer.py   
* python 2.7 win32 wheel     
(**IMP**) search baidupan, Chapter07_win32  
* GMM  
https://github.com/paperrune/GMM/blob/master/main.cpp  
* libMFCC - C library for computing Mel-Frequency Cepstral Coefficients  
https://github.com/jsawruk/libmfcc  
* c_speech_features, A port of python_speech_features to C.  
https://github.com/Cwiiis/c_speech_features  
* cpes, kws_guess  
https://github.com/ruslanbasic/cpes

## (TODO) html5, MFCC-DTW    
* speech_v1.rar  
index.html, harker.emit('speaking'), console.log('speaking');  
with USB microphone and Chrome/Opera      
(origin) https://github.com/MimusTriurus/WebExperiments  
(origin) https://github.com/shawkatq/voice-commands-demo

## (TODO) micro_speech (TFLM 2.0) train  
* https://github.com/tensorflow/tensorflow/tree/r2.0/tensorflow/lite/experimental/micro/examples/micro_speech#use-your-local-machine  
* https://github.com/tensorflow/docs/blob/master/site/en/r1/tutorials/sequences/audio_recognition.md  
* https://github.com/tensorflow/tensorflow/blob/r2.0/tensorflow/lite/experimental/micro/examples/micro_speech/train_speech_model.ipynb  
* https://github.com/tensorflow/examples/tree/master/lite/examples/speech_commands/ml  
* https://www.cnblogs.com/lijianming180/p/12258774.html

## (TODO) TensorFlow入门教程(17)语音识别  
search baidupan, 17.speech_recognition.zip  
TensorFlow入门教程(17)语音识别(上)  
https://blog.csdn.net/rookie_wei/article/details/84527839

## (TODO) diy-alexa, voice-controlled-robot, ESP32    
https://github.com/atomic14/diy-alexa  
Voice-Controlled Robot With the ESP32  
https://github.com/atomic14/voice-controlled-robot

## (TODO) MACE Micro Examples  
* classifier_mace_v2_xubuntu_host.tar.gz  
(demo) for x86 linux xubuntu  
(origin) MICRO_MODEL_NAME=mnist, MICRO_DATA_NAME=mnist  
https://github.com/XiaoMi/mace/blob/master/micro/examples/classifier/main.cc  
https://github.com/XiaoMi/mace/blob/master/micro/examples/classifier/data.h  
https://github.com/XiaoMi/mace/blob/master/docs/micro-controllers/basic_usage.rst  
see 'Use libraries directly'    
* (TODO) MICRO_MODEL_NAME=kws, MICRO_DATA_NAME=kws  
https://github.com/XiaoMi/mace/blob/master/docs/micro-controllers/deploy.rst  
* classifier_vs2013_v1.rar  
(demo) for vs2013, windows    
* some sites  
https://github.com/weimingtom/wmt_ai_study/blob/master/mace_001.txt

## (TODO) hyperconnect/TC-ResNet  
https://github.com/hyperconnect/TC-ResNet  
https://github.com/hyperconnect/TC-ResNet/blob/master/tflite_tools/run_benchmark.sh  
https://github.com/tranHieuDev23/TC-ResNet  
https://github.com/jianvora/Continual_Learning_for_KWS    
https://github.com/olimjon-ibragimov/TC-ResNet-TensorFlow-2

## (TODO) pytorch speech command tutorial  
https://github.com/pytorch/tutorials/blob/master/intermediate_source/speech_command_recognition_with_torchaudio.py  
https://pytorch.org/tutorials/intermediate/speech_command_recognition_with_torchaudio.html  
(TODO) kws_game  
https://github.com/chrisworld/kws_game

## (TODO) tflite python  
TensorFlow Lite Tutorial Part 3: Speech Recognition on Raspberry Pi  
https://www.digikey.com/en/maker/projects/tensorflow-lite-tutorial-part-3-speech-recognition-on-raspberry-pi/8a2dc7d8a9a947b4a953d37d3b271c71  
TensorFlow Lite Speech Recognition Demo  
https://github.com/ShawnHymel/tflite-speech-recognition  
【TensorFlow】Raspberry Piへのインストール方法3選  
https://www.sejuku.net/blog/47178  
TensorFlow Lite Python  
https://tensorflow.google.cn/lite/guide/python  
How to Run TensorFlow Lite Models on Raspberry Pi  
https://blog.paperspace.com/tensorflow-lite-raspberry-pi/

## (TODO) pico-wake-word  
https://github.com/henriwoodcock/pico-wake-word  
https://www.adafruit.com/product/1063  
MAX4466 (like MAX9814???)  
search baidupan, pico-wake-word-main.zip  
tensorflow 2.4.1, 2021-03-31

## (TODO) pytorch CRNN (???)    
https://github.com/isadrtdinov/kws-attention

## (TODO???) Edge Impulse, Recognize sounds from audio  
https://docs.edgeimpulse.com/docs/audio-classification  
http://www.elecfans.com/d/1532483.html  
seeedstudio wio terminal tinyml  
https://wiki.seeedstudio.com/Wio-Terminal-TinyML-EI-1/  
https://wiki.seeedstudio.com/Wio-Terminal-TinyML-EI-3/

## pico-microphone, Raspberry Pi Pico  
* https://github.com/sandeepmistry/pico-microphone  
https://github.com/raspberrypi/pico-sdk  
https://github.com/raspberrypi/pico-examples  
* hello_analog_microphone, ADC麦克风, using max4466（带直流分量, 512附近）和max9814（过滤直流，0附近, Gain接VCC最小增益）  
* hello_pdm_microphone, PDM麦克风, using M5stack PDM mini Unit (SPM1423HM4H-B)    
https://docs.m5stack.com/zh_CN/unit/pdm  
```
while (1) {
	// store and clear the samples read from the callback
	int sample_count = samples_read;
	samples_read = 0;

// loop through any new collected samples
	int maxValue = 0;
	for (int i = 0; i < sample_count; i++) { //or min(sample_count, 5)
		int value = sample_buffer[i];
		if (fabs(value) > fabs(maxValue)) {
			maxValue = value;
		}
	}
	//if M5stack PDM  
	printf("%d,%d,%d\n", maxValue / 128, -256, 256);
	//if max9814
	//printf("%d,%d,%d\n", maxValue, -512, 512);
	sleep_ms(50);
}
```
* hello_pdm_microphone, using MP34DT01 PDM MEMS Microphone<->Rpi Pico, why this ok? see below:   
(self) 3V<-> (self) SEL  
GND<-> GND  
* hello_analog_microphone, use MAX9814, for 3.3V and 5V  
* hello_analog_microphone, use MAX9813H, for 5V only  
* hello_analog_microphone, use MAX9812L, for 3.3V only, not good, go stable slowly

## (IMP, TODO) **Edge Impulse, tensorflow 2.3**    
* linux, xubuntu200464    
example-standalone-inferencing-master_v1.tar.gz  
* windows, vs2013  
helloei_v3_success.rar

## 画了个V3S，慢更语音助手（LUCKY）
https://whycan.com/t_7000.html  
记录自制linux的过程（基于全志V3s）  
https://blog.csdn.net/qq_46604211/article/details/116024970  
https://github.com/dakun-create/voice-assistant-byV3S

## (???) NVIDIA NeMo  
https://docs.nvidia.com/deeplearning/nemo/user-guide/docs/en/stable/starthere/tutorials.html

## (TODO) Speech commands recognition with PyTorch | Kaggle 10th place solution in TensorFlow Speech Recognition Challenge  
https://github.com/tugstugi/pytorch-speech-commands

## (TODO) [深度学习进阶 - 实操笔记] 语音识别基础  
https://blog.csdn.net/weixin_41809530/article/details/106585116  
[深度学习进阶 - 实操笔记] 语音识别SPEECH_COMMANDS数据集  
https://www.freesion.com/article/5523850245/  
https://blog.csdn.net/weixin_41809530/article/details/106585116  
https://blog.csdn.net/weixin_41809530/article/details/106669728

## (TODO) Offline Speech Recognition on Raspberry Pi 4 with Respeaker  
https://github.com/AIWintermuteAI/DeepSpeech_RaspberryPi4_Hotword  
https://www.hackster.io/dmitrywat/offline-speech-recognition-on-raspberry-pi-4-with-respeaker-c537e7

## (IMP) esp32 dsp (with asm)  
https://github.com/espressif/esp-dsp

## (???) Python, sipeed MaixPy, maix-asr, (speech_recognizer)    
https://blog.csdn.net/xuguoliang757/article/details/118462079  
https://github.com/sipeed/MaixPy_scripts/blob/master/multimedia/speech_recognizer/maix_asr_2900k_0x500000.kmodel  
https://bbs.sipeed.com/thread/988

## (IMP, TODO) TensorFlow语音识别实战      
* search book_TensorFlow语音识别实战  
* search baidupan, TensorFlow语音识别实战-源代码.7z    
* 第十章——基于MFCC和CTC的语音汉字转换  
* 第一章——语音识别之路, 1.7 实战——基于特征词的语音唤醒  
* 这本书的原创代码较多，可以研究  
* tensorflow-gpu==2.1.0

## (TODO) 以前用树莓派3b运行deepspeech和vosk的备份  
* 除了Sphinx外，在树莓派上可以运行的较完整的离线语音识别引擎有deepspeech和vosk  
search work_deepspeech_vosk_raspberry_pi_upload  
search deepspeech_readme.txt

## (TODO) Openai-whisper (for pyTorch) and whisper.cpp (for C++)  
* （可能）新的选择：openai-whisper  
我试过可以在python 3.7下运行（openai-whisper最旧版本），需要ffmpeg，  
但仅限于PC，没有在树莓派上测试，模型文件较小，但识别英文单词时间可能需要30秒以上      
* 较快的whisper推理版：whisper.cpp  
https://github.com/ggerganov/whisper.cpp  
比较容易编译（在ubuntu和aistudio），可以tiny-en model，可以识别句子，但识别单词似乎有问题（不知道为啥），待考  
* whisper and whisper.cpp command line   
```
有没有人试一下树莓派4b上跑whisper.cpp的速度如何？我试过（以前）在aistudio上用openai-whisper（20230117）
和whisper.cpp上运行语句识别，前者是10秒左右，后者是3秒左右。后者之所以快还因为模型文件格式变了（使用ggml）。
调用方式如下（我可能需要记录一下）：
whisper 2830-3980-0043.wav --language en --model tiny.en
./main -m models/ggml-tiny.bin -f samples/audio/2830-3980-0043.wav
```
* whisper.cpp on rpi4
```
我用树莓派4b 4gb版运行whisper.cpp成功（tiny-en模型，任务管理器里面那个main进程就是），
大概占用CPU全部100%，
占用内存150MB（增加到450MB，桌面环境下），耗时大概10秒（我之前用aistudio测试是3秒）
相当于whisper pytorch版的速度。至于树莓派4b运行whisper pytorch的速度如何，暂时还没测试。

尝试用树莓派4b 4gb运行whisper pytorch版，结果失败了，装倒是可以很容易装上去
（指定-i参数镜像加速），但运行会有错误，不会搞，等以后研究pytorch再说吧，
对我而言暂时没有多大的需要，除非我能看懂pytorch和懂得如何在树莓派上调试 
```
* whisper python, audio-0.6.0.tar.gz, Makefile    
```
	pip install openai-whisper==20230117
	whisper yes.2a6d6pep.wav --language en --model tiny.en
	(cd audio; whisper 2830-3980-0043.wav --language en --model tiny.en)
	(cd audio; whisper 4507-16021-0012.wav --language en --model tiny.en)
	(cd audio; whisper 8455-210777-0068.wav --language en --model tiny.en)
```
* whisper.cpp, build.sh  
```
./main -m models/ggml-tiny.bin -f samples/jfk.wav 
./main -m models/ggml-tiny.bin -f samples/audio/2830-3980-0043.wav
./main -m models/ggml-tiny.bin -f samples/audio/4507-16021-0012.wav
./main -m models/ggml-tiny.bin -f samples/audio/8455-210777-0068.wav
rm -rf samples/output.wav
ffmpeg -i samples/yes.2a6d6pep.wav -ar 16000 -ac 1 -c:a pcm_s16le samples/output.wav
./main -m models/ggml-tiny.bin -f samples/output.wav
```

## micro_speech  
* https://github.com/eliberis/microbit-speech  
by mbed, micro:bit  
* https://github.com/edgeimpulse/voice-activated-microbit  
by mbed, micro:bit  
* https://github.com/ARM-software/VHT-TFLmicrospeech  
* https://github.com/MatthiasHertel80/VHT-TFLmicrospeech

## Facebook flashlight and wav2letter, in C++  
* https://github.com/flashlight/flashlight/tree/main/flashlight/app/asr  
* https://github.com/flashlight/wav2letter

## Swift机器学习：面向iOS的人工智能实战  
* TLSphinx和OpenEars，它们都是cmu sphinx或pocketsphinx的ios移植版  
* https://github.com/tryolabs/TLSphinx    
* OpenEars, https://www.politepix.com/openears/tutorial/

## TensorFlow Model  
* https://github.com/tensorflow/models/tree/master/research/deep_speech  
* VGGish and YAMNet  
* https://github.com/tensorflow/models/tree/master/research/audioset  
* https://github.com/SensingClues/OpenEars

## PaddleSpeech  
* https://github.com/PaddlePaddle/PaddleSpeech

## (TODO?) TinyMaix, KWS example  
* https://github.com/sipeed/TinyMaix/tree/main/examples/kws  
* Although **sipeed/Maix-Speech** is closed source, but TinyMaix is open source  
* https://github.com/YuzukiHD/TinyMaix-RP2040/tree/master/examples/kws  
* pc build: TinyMaix-RP2040-master_v1_ubuntu140432.tar.gz  
* ***No training method for kws ???***  
* see https://github.com/sipeed/TinyMaix/tree/main/tools/tmdl  
* https://github.com/Ai-Thinker-Open/aithinker_Ai-M6X_SDK

## (TODO, IMP) Demonstrator project for speech recognition featuring several technologies, with tensorflow.js  
* https://goepfert.github.io/audio_features/  
* https://github.com/goepfert/audio_features  
* tfjs, TensorFlow.js  
* https://github.com/tensorflow/tfjs

## (TODO) 基于DNN和DTW算法配合VAD截取的微语音识别框架, some sources lost, keil    
* https://github.com/jerenhu/MiniSpeech  
* (TODO, IMP) https://github.com/jerenhu/MiniSpeech/blob/master/MATLAB/dtw.m

## (TODO) LSTM + CTC (?), TensorFlow 2深度学习实战, 人民邮电出版社  
* 57590_TensorFlow2深度学习实战_正文数据和代码.zip  
* 第5章, 基于LSTM网络的语音识别  
* LSTM + CTC (with TensorFlow 2.2 ?)    
* https://www.ryjiaoyu.com/book/details/44052  
* https://m.ryjiaoyu.com/resource/29440  
* ref: 神经网络与深度学习实战：Python+Keras+TensorFlow  
* ref: LSTM, sparse_categorical_crossentropy, mfcc  
* https://github.com/search?q=sparse_categorical_crossentropy+mfcc&type=code  
* ref: (run failed, see my aistudio) 
```
我试过用aistudio跑《TensorFlow 2深度学习实战里面》那个LSTM例子代码，
的确是可以跑得通的（我用的是TensorFlow 2.3）。
不过我以前还试过另一个LSTM的语音识别，结果失败了，是这个：
《Python+TensorFlow机器学习实战》第9.2章
（可能这里已经改好了：llSourcell/tensorflow_speech_recognition_demo）。
有时间可以对照改一下。
```
* ref: https://github.com/llSourcell/tensorflow_speech_recognition_demo  
* search tf2lstm5_v1.tar.gz

## (TODO) LSTM + CTC (???), Python自然语言处理实战
* Hands-On Natural Language Processing with Python  
* https://www.ituring.com.cn/book/2679  
* 《Python自然语言处理实战》链接表  
https://www.ituring.com.cn/article/510382  
* Hands-On Natural Language Processing with Python  
https://www.packtpub.com/free-ebook/hands-on-natural-language-processing-with-python/9781789139495  
* (IMP) 第11章, 使用DeepSpeech进行语音识别  
https://github.com/PacktPublishing/Hands-On-Natural-Language-Processing-with-Python/blob/master/Chapter11/01_example.ipynb  
tflearn, librosa mfcc, tflearn.lstm categorical_crossentropy  
search baidupan, Python自然语言处理实战  
* https://github.com/Jakobovski/free-spoken-digit-dataset  
speech_dset

## TFLearn LSTM, tensorflow_speech_recognition_demo, and 《Python+TensorFlow机器学习实战》第9.2章  
* (my work) https://github.com/weimingtom/tensorflow_speech_recognition_demo_mod  
* (origin) https://github.com/llSourcell/tensorflow_speech_recognition_demo  
* mod ref to https://github.com/PacktPublishing/Hands-On-Natural-Language-Processing-with-Python/blob/master/Chapter11/01_example.ipynb  
* see https://github.com/tflearn/tflearn/blob/master/tutorials/intro/quickstart.md  
* search spoken_numbers_pcm.tar  
* search tensorflow_speech_recognition_demo-master_min_v2_success.zip  
* search tf_02.tar.gz  
* data set from https://github.com/pannous/tensorflow-speech-recognition  
* data set from https://github.com/pannous/caffe-speech-recognition  
* https://github.com/hcchengithub/tensorflow_speech_recognition_demo/blob/master/lstm-tflearn.py  
* https://github.com/llSourcell/tensorflow_speech_recognition_demo/issues/29  
* https://github.com/Chancing0/EZ-LSTM-Speech-Recognition-Project  
* https://github.com/pannous/tensorflow-speech-recognition/blob/master/lstm-tflearn.py

## (TODO, IMP, not exists now) ESP8266 Baidu ASR Demo (AT command)  
* https://github.com/achinwoo/BAIDU_ASR_ESP8266/blob/master/app/user/user_main.c  
* https://github.com/achinwoo/BAIDU_ASR_ESP8266/blob/master/lib/librest.a  
* https://github.com/achinwoo/BAIDU_ASR_ESP8266  
* https://github.com/MhageGH/esp32_CloudSpeech  
* https://github.com/MhageGH/esp32_SoundRecorder  
```
app/include/rest.h, lib/librest.a, vop.baidu.com/pro_api    
int send_baidu(int sta_socket);
```
* 百度大脑, AI开放平台, 语音识别极速版API  
* (IMP) https://github.com/Baidu-AIP/speech-demo  
* https://ai.baidu.com/ai-doc/SPEECH/jkhq0ohzz  
* https://ai.baidu.com/ai-doc/  
* (old, not used) https://ai.baidu.com/docs#/ASR-API-PRO/top  
* https://blog.csdn.net/weixin_40973138/article/details/103106608  
* https://ai.baidu.com/forum/topic/show/957508  
* https://blog.csdn.net/weixin_43271060/article/details/90318840  
* https://github.com/lixy123/TTGO_T_Watch_Baidu_Rec  
* https://github.com/lixy123/ESP32-AUDIO-REC

## 基于百度语音的识别语音，转文字  
* https://gitee.com/rx-ted/baidu-asr

## ESP32 语音唤醒+离线识别+百度在线识别  
* https://github.com/HoGC/esp_speech_recognition  
* search github, esp32 speech, esp8266 speech

## (TODO) DTW, 用“芯”探核：龙芯派开发实战  
* https://max.book118.com/html/2021/0507/6035234121003144.shtm  
* 第十二章，语音关键词检索  
* CSpeechRecognitionCore::DTWCal  
* search 龙芯派开发实战_第12章语音识别

## (TODO) TinyML Cookbook  
* Chapter 4: Voice Controlling LEDs with Edge Impulse  
* https://www.packtpub.com/product/tinyml-cookbook/9781801814973  
* https://github.com/PacktPublishing/TinyML-Cookbook  
* (TODO) https://github.com/PacktPublishing/TinyML-Cookbook/blob/main/Chapter04/ArduinoSketches/09_kws_raspberrypi_pico.ino  
* (TODO) https://github.com/PacktPublishing/TinyML-Cookbook/blob/main/Chapter04/ArduinoSketches/07_kws_arduino_nano_ble33_sense.ino

## Deep Learning for NLP and Speech Recognition  
* https://github.com/SpringerNLP   
* Chapter 8: Automatic Speech Recognition, with Kaldi and Sphinx  
https://github.com/SpringerNLP/Chapter8  
CMUSphinx (sphinxbase+sphinxtrain+pocketsphinx+cmuclmtk), with GMM/HMM  
* Chapter 12: End-to-end Speech Recognition, with deepspeech2 pytorch  
https://github.com/SpringerNLP/Chapter12  
https://github.com/SeanNaren/deepspeech.pytorch  
* Chapter 7: Recurrent Neural Networks, with LSTM  
https://github.com/SpringerNLP/Chapter7

## Voiceprint-Recognition  
* https://github.com/SunYanCN/Voiceprint-Recognition  
* https://github.com/microsoft/nni  
* https://github.com/majianjia/nnom  
* https://github.com/rjagiasi/SpeakerRecognition

## sherpa-ncnn  
* https://github.com/k2-fsa/sherpa-ncnn  
* http://speechhome.com/blogs/kaldi/1632583916625989632  
* RV1126  
https://www.zhihu.com/zvideo/1615111252941922304  
* https://k2-fsa.github.io/sherpa/ncnn/android/build-sherpa-ncnn.html#download-pre-trained-models  
* https://huggingface.co/PingfengLuo/icefall-asr-conv-emformer-transducer-stateless2-zh  
* apk file see 'Files and versions' of this page :  
https://huggingface.co/csukuangfj/sherpa-ncnn-apk

## ThatProject, ESP32_MICROPHONE  
* https://github.com/0015/ThatProject/tree/master/ESP32_MICROPHONE

## (TODO) Keras 2D CNN+RNN+CTC  
* Automatic Speech Recognition using CTC  
https://keras.io/examples/audio/ctc_asr/  
https://huggingface.co/keras-io/ctc_asr  
https://huggingface.co/spaces/keras-io/ctc_asr  
https://github.com/keras-team/keras-io/blob/master/examples/audio/ctc_asr.py

## KWS-SoC——基于Wujian100的音频流关键词检测SoC拓展开发笔记之二  
* https://github.com/IA-C-Lab-Fudan/KWS-SoC
* https://zhuanlan.zhihu.com/p/158614684

## IoT for Beginners - A Curriculum, Recognize speech with an IoT device  
* 深入浅出 IoT: 完整项目通关实战  
* https://github.com/microsoft/IoT-For-Beginners/blob/main/6-consumer/lessons/1-speech-recognition/README.md#/seeed-projects/IoT-For-Beginners/blob/main/6-consumer/lessons/1-speech-recognition/pi-audio.md    
* https://gitee.com/seeed-projects/IoT-For-Beginners/blob/main/6-consumer/lessons/1-speech-recognition/README.md#/seeed-projects/IoT-For-Beginners/blob/main/6-consumer/lessons/1-speech-recognition/pi-audio.md  
* https://tinkergen.cn/book_iot  
* https://zhuanlan.zhihu.com/p/650779093

## PyTorch2.0深度学习从零开始学, pytorch    
* 第14章, 创建你自己的小精灵—基于MFCC的语音唤醒实战  
* PyTorch2.0深度学习从零开始学-源码.rar

## (TODO) NLP  
* 中文语料库, 中文语料   
* 知识图谱, 知网, csdn, wordnet   
* search baidupan, 语料，Corpus
* cncorpus, (dead) http://www.cncorpus.org/Resources.aspx

## (TODO) Whisper.cpp for Android    
* https://github.com/ggerganov/whisper.cpp/tree/master/examples/whisper.android

## gd32f450-run-tflite-micro-speech-demo  
* why D:\work_gd32_tflite\GD32F4xx_Firmware_Library_V2.1.3  
* good  
* but this not good ??? : D:\work_gd32_tflite\gd32f450-run-tflite-micro-speech-demo-main\GD32F4xx_Firmware_Library_V2.1.3  
* path too long????   
* ==  
* search_baidupan_gd32_tflite_speech_maybe_009.txt  
* https://www.bilibili.com/video/BV1dq4y1t74i/?spm_id_from=333.788&vd_source=8aac237d3ed1fe24370f8df03ab1993d  
* https://github.com/newffnow/gd32f450-run-tflite-micro-speech-demo/tree/main/GD32F4xx_Firmware_Library_V2.1.3/Examples  
* ==
* final done, search micro_speech_v3_O3_success_liangshan_mdk5_ac6.7z  
```
跑通梁山派gd32的tflite micro, micro speech
https://github.com/newffnow/gd32f450-run-tflite-micro-speech-demo
search, micro_speech_v3_O3_success_liangshan_mdk5_ac6.7z
我跑通了newffnow/gd32f450-run-tflite-micro-speech-demo，
对应这个《[009]检测给定音频是否包含“yes”和“no”——
单片机运行tensorflow lite的micro speech例程》，非传感器，纯数据处理。
我用梁山派测试，串口需要单独用工具接UART4的两个脚，计算速度还是比较快的。
以后有机会再尝试用传感器测试。编译这个需要改很多地方，例如：
（1）只能用-O2,-O3,-Ofast编译，其他可能会编译错误
（2）可能需要改static inline，但不一定有效，见问题1
（3）用MDK5的AC6编译，AC5不行
调试串口
https://lckfb.com/project/detail/lckfb_lspi?param=drawing
梁山派<->USB-TTL
left left 7, PD2=UART4_RX<->TXD(orange)
left right 7, PC12=UART4_TX<->RXD(yellow)
right left bottom 1, GND=GND<->GND(black)
```

## (TODO) SYSTRAN/faster-whisper  
* https://github.com/SYSTRAN/faster-whisper  
* https://www.wasp.co.jp/blog/291  
* TODO, running on x86_64 and arm (aistudio and rpi), currently failed

## whisper (python version, pytorch version, openai-whisper) installed by pip of raspberry pi 4b  
* 树莓派4b安装whisper（don't sudo pip install）  
Newest version of openai-whisper is ok, no need to install old version 20230117.  
After installing, need to pip uninstall torch and reinstall old version torch==1.13.1, see below.     
```
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple openai-whisper==20230117  
pip install typing-extensions==4.3.0
/home/pi/.local/bin/whisper --help
pi@raspberrypi:~/whisper.cpp_aistudio/audio $ /home/pi/.local/bin/whisper 4507-16021-0012.wav --language en --model tiny.en

cp tiny.en.pt ./.cache/whisper/tiny.en.pt

gedit /home/pi/.local/lib/python3.9/site-packages/whisper/decoding.py
```
* running failed, to solve this problem, see below, pip uninstall torch==2.0.0  
```
vi /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/whisper/decoding.py
line 468
        print(tokenizer.sot, self.initial_tokens, "test")
        if self.initial_tokens.count(tokenizer.sot) > 0:
        self.sot_index: int = self.initial_tokens.index(tokenizer.sot)
        else:
            self.initial_tokens = (tokenizer.sot,)
            self.sot_index: int = 1
```

* 【RaspberryPi】Whisperで音声認識させてみた  
https://chmod774.com/whisper-raspberrypi/  
```
pip list | grep torch
pip uninstall torch==2.0.0
pip install torch==1.13.1
```
* 转，《【RaspberryPi】Whisperで音声認識させてみた》  
我测试过这篇文章的方法，可以成功用树莓派4b的6位os运行起whisper pytorch版。方法是重新安装pytorch降级到pytorch 1，如果用pytorch 2会报错：  
```
pip uninstall torch==2.1.0  
pip install torch==1.13.1  
```
测试方法是：whisper 2830-3980-0043.wav --language en --model tiny.en  
耗时大概是13秒

## fquirin/speech-recognition-experiments, Whisper TFlite    
* https://github.com/fquirin/speech-recognition-experiments  
* 各种新兴语音识别引擎在树莓派上的性能准确率对比  
* 我记错了，实际上应该是aistudio的whisper.cpp略快于aarch安卓版whisper.cpp，aarch安卓版whisper.cpp快于树莓派4b版的whisper.cpp，而树莓派4b版的whisper.cpp快于armeabi-v7a安卓版的whisper.cpp，分别是3秒<4秒<10秒<12秒 。另外机器的性能越好，速度越快，例如平板的安卓会比手机的安卓跑whisper.cpp的速度更快  
* gh上有人评测了各种新兴语音识别引擎在树莓派4和香橙派5上的运行速度对比（RTF是实时率，没什么用），fquirin/speech-recognition-experiments，这里我注释一下，其一树莓派4上跑whisper python似乎有问题（补注：已解决，卸载torch 2重新安装1.13.1版），可能这个是作者自己编译运行的。其二我测试whisper.cpp在树莓派4b上是10秒左右，我以前记错了，我以为是3秒（3秒应该是aistudio的速度）

## (TODO, TODO) Whisper TFlite (for android)  
* TODO. How and why this works well ?
* see https://github.com/vilassn/whisper_android
* see below

## whisper.cpp for android (yeyupiaoling/Whisper-Finetune), fastest speed on Android is 4 seconds per one Engish sentence (64bit Android fastest is 4 seconds, 32bit Android fastest is 12 seconds)      
* mod from https://gitee.com/yeyupiaoling/Whisper-Finetune  
* or https://github.com/yeyupiaoling/Whisper-Finetune  
* whisper.cpp版研究。好了，目前最好的记录是一句英文的语音识别需要4秒（如果是32位安卓手机则为12秒），我这次用的代码是yeyupiaoling/Whisper-Finetune的安卓版代码，替换英文版的模型文件，然后在Application.mk指定APP_OPTIM := release（作者说的一定要打包成发布版，可以通过这种方式加速）。如果不指定这个，就会达到100多秒。那就是说：（1）必须指定APP_OPTIM（参考Whisper-Finetune）（2）必须使用最新版NDK（3）必须保证代码没修改过，使用指定正确的C和C++宏定义（我之前编译的版本用的宏定义和Whisper-Finetune里面的不同）  
* search baidupan, Whisper-Finetune-master_v2.apk  
* search baidupan, Whisper-Finetune-master_v2_very_good_redmi12c_4sec_redmi9a_12sec.7z  
* Whisper-Finetune  
https://gitee.com/yeyupiaoling/Whisper-Finetune/tree/master/AndroidDemo  
search whisper.apk

## whisper.cpp for android arm64 (whisper.android.java in ggerganov/whisper.cpp/examples), 5 seconds (tested on Redmi 12C)    
* https://github.com/ggerganov/whisper.cpp/tree/master/examples/whisper.android.java  
* 快到5秒可以运行到，但编译成arm64，而且用最新NDK编译不是r10  
* search whisper.android.java_simple_v1_success_redmi12c_5sec.7z  
* search whisper.cpp-1.0.4_see_whisper_android-master.zip  
* search whisper.cpp_old_version.7z  
* 我比较过，那个运行正确且速度较快（在20秒内转换一个英语句子）的whisper.cpp安卓版，是来源于1.0.4版本附近，相当于最早的发布版（有很少的修改，但代码和1.0.4几乎一样。这个项目火起来是在2023年4月左右，大概是版本1.3左右），这么看来如果有耐心的话可以从1.0.4版一直测试到1.5.0版，找到合适自己的版本编译成安卓版测试速度，就可以知道whisper.cpp安卓版最快可以在多少秒内语音识别出一个英语句子了，粗略估计可以在10秒内，最快可以到达5秒，如果手机是稍微高档一点（比红米好，主频在2.0GHz以上）或者支持显示加速，估计可以达到树莓派4b的水平，可以在3秒左右识别出英语句子，当然这目前只是我臆想猜测的，我还没有实际测试过（我手头上配置最好的设备时华为平板，可以找时间测试）  
* search whisper.android.java_simple_v2_success_redmi12c_5sec_redmi9a_16sec.rar  
* <1> whisper 1.0.4 android：  
https://github.com/Digipom/WhisperCppAndroidDemo    
* <2> whisper tflite：  
https://github.com/vilassn/whisper_android  
* 安卓whisper.cpp.android.java上传网盘的编译文件名  
whisper.android.java_v3_2830wav_use_146630ms.7z  
https://developer.android.google.cn/ndk/guides/cpu-arm-neon?hl=zh-cn#ndk-build_1  
LOCAL_ARM_NEON := true  
https://developer.android.google.cn/ndk/guides/cpp-support?hl=zh-cn  
APP_STL 变量指定 c++_shared、c++_static、none 或 system。例如：  
https://www.itxm.cn/post/edafbg2b5.html

## mozilla/Deepspeech test audio wav files  
* 2830-3980-0043.wav
* https://github.com/mozilla/DeepSpeech/releases/tag/v0.9.3
* https://github.com/mozilla/DeepSpeech/releases/download/v0.9.3/audio-0.9.3.tar.gz
* or you can use other wav files in https://github.com/mozilla/DeepSpeech
* or you can use other wav files with  
```
Format                         : Wave
Overall bit rate mode          : Constant
Overall bit rate               : 256 kb/s

Audio
Format                         : PCM
Format settings, Endianness    : Little
Format settings, Sign          : Signed
Codec ID                       : 1
Bit rate mode                  : Constant
Bit rate                       : 256 kb/s
Channel(s)                     : 1 channel
Sampling rate                  : 16.0 kHz
Bit depth                      : 16 bits
```

## 小智 AI 聊天机器人（XiaoZhi AI Chatbot）, Xiaozhi by websocket  
* https://github.com/78/xiaozhi-esp32  
* https://github.com/xinnan-tech/xiaozhi-esp32-server  
* https://github.com/TOM88812/xiaozhi-android-client  
* https://github.com/Huang-junsen/py-xiaozhi  
* https://github.com/100askTeam/xiaozhi-linux  
* https://github.com/joey-zhou/xiaozhi-esp32-server-java

## whisper-base  
* https://huggingface.co/openai/whisper-base

## Sherpa-ONNX Kroko ASR English model for Android  
* https://github.com/kroko-ai/kroko-onnx
* https://github.com/k2-fsa/sherpa-onnx
* https://github.com/k2-fsa/sherpa-onnx/releases/tag/v1.12.33
* https://github.com/k2-fsa/sherpa-onnx/releases/download/v1.12.33/sherpa-onnx-v1.12.33-android.tar.bz2
* https://github.com/k2-fsa/sherpa-onnx/archive/refs/tags/v1.12.33.zip
* https://github.com/k2-fsa/sherpa-onnx/tree/v1.12.33/sherpa-onnx/kotlin-api
* https://github.com/k2-fsa/sherpa-onnx/blob/v1.12.33/android/SherpaOnnx/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt
Change type to 21: val type = 21  
```
    private fun initModel() {
        // Please change getModelConfig() to add new models
        // See https://k2-fsa.github.io/sherpa/onnx/pretrained_models/index.html
        // for a list of available models
        val type = 0
        var ruleFsts : String?
        ruleFsts = null
```
* https://github.com/k2-fsa/sherpa-onnx/blob/v1.12.33/sherpa-onnx/kotlin-api/OnlineRecognizer.kt
```
        21 -> {
            val modelDir = "sherpa-onnx-streaming-zipformer-en-kroko-2025-08-06"
```
* https://github.com/k2-fsa/sherpa-onnx/tree/v1.12.33#links-for-pre-built-android-apks
* https://k2-fsa.github.io/sherpa/onnx/android/apk.html
* https://huggingface.co/csukuangfj2/sherpa-onnx-apk/resolve/main/asr/1.12.33/sherpa-onnx-1.12.33-arm64-v8a-asr-en-zipformer_kroko_asr.apk

## android-vad  
* https://github.com/gkonovalov/android-vad

## (Useless? To calculate current volume, for visual volume showing?) RMS(Root Mean Square, 均方根能量, 衡量信号平均功率，常用于‌音量归一化‌(如将音频RMS统一至-23 dBFS)，与预加重无直接数学关联), 录音算法, not tested, see xunfei(iflytek) SparkChain Android SDK
* https://github.com/Arcueid0221/Chinese_game/blob/main/SparkChain_Android_SDK_2.0.1_rc1/app/src/main/java/com/example/sparkchaindemo/utils/AudioRecorderManager.java
```
    /**
     * 录音线程
     */
    Runnable recordRunnable = new Runnable() {
        @Override
        public void run() {
            try {
                if (mRecorder != null) {
                    android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
                    int bytesRecord;
                    //int bufferSize = 320;
                    byte[] tempBuffer = new byte[bufferSize];
                    if (mRecorder.getState() != AudioRecord.STATE_INITIALIZED) {
                        stopRecord();
                        return;
                    }
                    mRecorder.startRecording();
                    //writeToFileHead();
                    while (isStart.get()) {
                        synchronized (this){
                            if (null != mRecorder) {
                                bytesRecord = mRecorder.read(tempBuffer, 0, bufferSize);
                                if (bytesRecord == AudioRecord.ERROR_INVALID_OPERATION || bytesRecord == AudioRecord.ERROR_BAD_VALUE) {
                                    continue;
                                }
                                if (bytesRecord != 0 && bytesRecord != -1 && isStart.get()) {
                                    //在此可以对录制音频的数据进行二次处理 比如变声，压缩，降噪，增益等操作
                                    // 使用RMS方法计算音量
                                    double sumSquares = 0.0;
                                    int sampleCount = bytesRecord / 2;  // 每个样本16位(2字节)

for (int i = 0; i < bytesRecord; i += 2) {
                                        // 将两个字节转换为一个16位短整型
                                        short sample = (short) ((tempBuffer[i] & 0xFF) |
                                                ((tempBuffer[i + 1] & 0xFF) << 8));
                                        // 计算平方和
                                        sumSquares += (double)sample * sample;
                                    }

// 计算RMS (均方根)
                                    double rms = Math.sqrt(sumSquares / sampleCount);

// 转换为分贝值 (防止除以0)
                                    double db = -120.0; // 默认极低值
                                    if (rms > 1e-10) {  // 避免log(0)
                                        db = 20 * Math.log10(rms / 32767.0);
                                    }

// 映射到0-9音量等级
                                    int volume = 0;
                                    if (db > -60) {
                                        // 更符合人耳感知的映射：-60dB(0级)到-20dB(9级)
                                        volume = (int) Math.min(9, Math.max(0, (db + 60) * 9 / 40.0));
                                    }
                                    callback.onAudioVolume(db,volume);
                                    //我们这里直接将pcm音频原数据写入文件 这里可以直接发送至服务器 对方采用AudioTrack进行播放原数据
                                    callback.onAudioData(tempBuffer,bytesRecord);
                                } else {
                                    break;
                                }
                            }
                        }
                    }
                }

} catch (Exception e) {
                Log.w(TAG,"录音异常:"+e.toString());
                e.printStackTrace();
            }finally {
                if (mRecorder != null) {
                    mRecorder.stop();
                    mRecorder.release();
                    mRecorder = null;
                }
            }
        }

};
```

## (TODO) TODO list, keep putting here at last    
* https://github.com/edgeimpulse/voice-activated-microbit  
* https://github.com/ggerganov/whisper.cpp  
* https://github.com/k2-fsa/sherpa-ncnn/blob/master/android/SherpaNcnn/app/src/main/java/com/k2fsa/sherpa/ncnn/MainActivity.kt
* https://github.com/houaohui/ChatGPT-Assistant  
* https://github.com/kendryte/K230_training_scripts

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