Channel vocoders are the time domain vocoders.

Speech coding is the process of applying data compression to digital audio signals that contain speech. It involves transforming speech signals into a more compressed form that can be transmitted with fewer binary digits.  Speech coding is important because of the growing demand for low bitrate communication systems. Different standards have different advantages and disadvantages depending on the application's quality, bandwidth, complexity, and compatibility requirements. Speech coding has two parts: Coder: Analyzes the input Decoder: Synthesizes or reconstructs the output speech  The... Show more

Speech coding is the process of applying data compression to digital audio signals that contain speech. It involves transforming speech signals into a more compressed form that can be transmitted with fewer binary digits. 

Speech coding is important because of the growing demand for low bitrate communication systems. Different standards have different advantages and disadvantages depending on the application's quality, bandwidth, complexity, and compatibility requirements.

Speech coding has two parts:
Coder: Analyzes the input
Decoder: Synthesizes or reconstructs the output speech 
The overall systems are called codecs. 

Topics include: Signals Characteristics, Quantization Techniques, Frequency Domain Coding, Vocoders, Linear Predictive Coders, & Speech Codecs.

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