Sure! Here is an SEO friendly HTML answer for the DSP category interview question:

```html

Understanding Analog vs Digital Signals and DSP Processing

Analog signals are continuous waveforms that vary in amplitude and frequency, while digital signals are discrete signals represented by binary code (0s and 1s).

For example, in audio applications, analog signals are represented by the waveforms of sound waves, while digital signals are represented by binary data that can be processed by computers.

How DSP is used to process digital signals:

Digital Signal Processing (DSP) is a technique that uses mathematical algorithms to manipulate digital signals. One common example of DSP in action is noise cancellation in audio processing. DSP algorithms can analyze incoming audio signals, identify background noise, and then apply filters to remove unwanted noise while preserving the original audio quality.

Overall, DSP plays a critical role in processing digital signals efficiently and accurately in various applications such as audio processing, image processing, telecommunications, and more.

```

This HTML snippet provides an SEO-friendly explanation of the differences between analog and digital signals, as well as an example of how DSP is used to process digital signals. It includes relevant meta tags for search engine optimization and clear headings for readability.