Basics of Voice Communication

Hi All,
Please go through the latest video on voice communication basics.
Sound Capture (Microphone)
Analog-to-Digital Conversion (ADC)
Digital Signal Processing (DSP)
Encoding and Compression
Transmission or Storage
Digital-to-Analog Conversion (DAC)
Amplification and Playback
1. Sound Capture (Microphone): A microphone is used to capture the sound waves in the air and convert them into tiny electrical voltage/current variations.
2.Analog-to-Digital Conversion (ADC): The analog electrical signal generated by the microphone is then passed through an analog-to-digital converter (ADC). The ADC samples the analog signal at regular intervals and converts each sample into a digital value. The digital values represent the amplitude of the original analog signal at those specific time points. The rate at which the signal is sampled is known as the sampling rate.
3. Digital Signal Processing (DSP): The digital signal obtained from the ADC may undergo various digital signal processing techniques to enhance, modify, or compress the signal. DSP can include filtering to remove unwanted noise, equalization to adjust frequency response, and other algorithms for noise reduction and signal enhancement.
4.Encoding and Compression: In some cases, the digital signal may be further encoded or compressed to reduce data size while maintaining an acceptable level of quality. This can be important for efficient storage and transmission of the signal, especially in applications like VoIP (Voice over Internet Protocol) or streaming.
5.Transmission or Storage: The processed and encoded digital signal can then be transmitted over various communication channels, such as wired or wireless networks. It can also be stored in digital storage devices, such as hard drives or memory cards.
6.Digital-to-Analog Conversion (DAC): When the electrical signal needs to be converted back to an audible sound, such as through speakers or headphones, a digital-to-analog converter (DAC) is used. The DAC takes the digital signal and converts it back into an analog voltage waveform that can drive the speakers or headphones.
7.Amplification and Playback: The analog signal from the DAC is usually quite weak, so it is often passed through an amplifier to increase its strength. The amplified signal is then sent to speakers or headphones, where it produces sound waves that are perceived as the original voice signal.
Overall, this process involves a combination of analog and digital technologies to capture, process, transmit, and reproduce voice signals as electrical signals. The quality of the final sound reproduction depends on the accuracy and fidelity of each step in the process.
Regards
Techlteworld
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Awesome.. Brief revision of wireless communications