Kaldi GMM

Posted by in Software, Speech Recognition

This is the golden formula in the speech recognition. The argmax function means find the value of w that makes p(x|w) maximum. Here x is observation acoustic signal. So basically we compute all possible sequence and then for each one of them calculate the possibility of seeing such an acoustic signal. This is a very…

Voltage Feedback Amplifier(VFB) vs Current Feedback Amplifier(CFB)

Posted by in Electrical Engineering, Hardware Design

Voltage Feedback Amplifier(VFB) or Current Feedback Amplifier(CFB). that is the question! This document will summarize the difference Current Feedback Amplifier Advantage No fixed gain bandwidth product (high gain and high bandwidth at the same time!) Ultra slew rate (Inverting configuration maximizes input slew rate) Disadvantage Only the non-inverting input is the high input impedance feedback…

Understanding Partitions in Android MediaTek Chips

Posted by in Android

Preloader: initial bootloader code that runs when the device is powered on. Vbmeta: Verified Boot metadata, which is used to verify the integrity of the boot image. Vbmeta_system: Verified Boot metadata for the system partition. Vbmeta_vendor: Verified Boot metadata for the vendor partition. Spmfw: Secure Partition Manager firmware. Lk: Little Kernel bootloader. Boot: kernel and…

Flash Samsung Galaxy A34 SP Flash Tool

Posted by in Android, Software

Scatter File To use the SP Flash tool you need to have a scatter file. One easy way to find that is to look out for other devices that use the same chipset but the manufacturer releases the firmware file including the scatter file one such manufacturer is Xiaomi but you may find other manufacturers…

Samsung MTK Force BRom (DM)

Posted by in Android, Software

Half of Samsung devices come with a MediaTek chip. These chips come with a special mode called BROM or emergency mode. This is something that by default is not enabled but if the device goes into broken mode it will activate to allow the device to be flashed without the need for a jtag connection….

How to Downgrade Samsung SW REV. CHECK FAIL

Posted by in Android

If you try to downgrade a new Samsung phone to an older firmware using Odin you are gonna get SW REV. CHECK FAIL. Fortunately, there’s a fix for this but it takes a little bit of patience Quick Guide Download and install 7-Zip Download the required tool. Extract the Ap_<Version>.tar.md5‚Äč content in the same place…

Web Extension Console Firefox

Posted by in Software

Developing Firefox extensions could be rough but shouldn’t be. here are few techniques to smooth out the process 1. Dev Console Access all extension logs by visiting about:debugging#/runtime/this-firefox and clicking on the Inspect button to see console.log logs. For background scripts, you can see the logs also in the browser console by pressing Ctrl+Shift+J 2….

How UDP Hole Punching Work

Posted by in Linux, Software, Windows

TCP/UDP hole punching or NAT traversal works as following: A and B are behind NAT and want to communicate, while you have public relay server, S. 1. A connects to S, B connects to S 2. S send A ip and port to B, and send B ip and port to A 3. One of…

RNN vs CNN in Speech Recognition

Posted by in Speech Recognition

RNN or CNN, that’s the question. so what should you use? Let the battle begin So speech recognition is a very broad task. People use speech recognition to do speech-to-text on videos, a pre-recorded data which you can go back and forth between past and future and optimize the output a couple of times. On…

Windows Accurate Timing

Posted by in Software, Windows

There’s a lot of controversial discussion over the internet about achieving accurate sleep function on Windows platforms. The problem is most of them are very old and with the introduction of multicore processors many of the older functions break down but this is not the case in 2023. Nowadays you can easily call the cross-platform…

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