- Speech is the most natural form of human-human communications.
- Speech may be a more intuitive way of accessing information, controlling things, and communicating.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpyY3_cPSFynrrcLovsQVnQaGUSoywagFjEH3mfCaMD2TkcQ7zpn53GzmloCBcgzuK_PFOur43-CPV-EuxkFbCSpGtx3JbYq4HQrOCrwJ7CY4tWzwkbObziKl5GsY1irgBMINFlM468_2i/s400/Captureaa.png)
Purpose of Speech Processing:
- To understand speech as a means of communication.
- To represent speech for transmission and reproduction.
- To analyze speech for automatic recognition and extraction of information.
- To discover some physiological characteristics of the talker.
Block Diagram of Speech Processing:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqEhvI8_baTgc0fUzBFIW4FQGpycE901tbQrzVY76Lt9Evzl7LxpiFY9QkXkGpRq8TOGHAz2ke7596Zg7GvLcikYQfQKUlAQmz0kNamiOritusZFXAvozVRRBqJTi-oU1xMfqftE5Bwh62/s640/Capturea.png)
- The above figure shows a block diagram of a generic speech encoding system.
- In this, the A-to-D converter converts the analog speech signal to a sampled waveform representation.
- The digital signal is analyzed and coded by digital computation algorithms to produce a new digital signal that can be transmitted over a digital communication channel.
- The procedure to convert digitized speech signal with higher bit rate to lower bit rate is called compression.
Examples:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6JrBy3DcqtgXvomwAmgsRsPj0X4rhZikbo-89yGUMhJEd7JxrAsus5ZA5pLDuhDVYPS5Y6b33Y9vLL3L6TSOjGZFSiCsCAjoUKfRvu0ccN8DnGdJHjbddGiDO7ozLCJw53JsoemJA66T_/s320/u_10115665.jpg)
Used for Radio systems
Used for voice recordings