1D signal vs 2D signal

Tiya Vaj
1 min readFeb 17, 2024

Absolutely! Here’s a breakdown of 1D and 2D signals, along with some visual examples to make it clearer:

1D Signals

  • Definition: A 1D (one-dimensional) signal is a signal that changes along only one dimension — typically time. In essence, its value depends on a single independent variable.
  • Examples:
  • Sound wave: The amplitude (volume) of a sound wave varies over time.
  • Stock prices: Stock prices fluctuate over time.
  • Electrocardiogram (ECG): An ECG measures the electrical activity of the heart over time.

2D Signals

  • Definition: A 2D (two-dimensional) signal varies across two dimensions. Most commonly these dimensions are spatial (like the x and y positions within an image).
  • Examples:
  • Image: The brightness or color intensity of each pixel in an image changes based on its x and y position within the image.
  • Geographic map: The elevation on a topographical map varies based on longitude and latitude coordinates.
  • Medical imaging (X-ray or MRI scan): Intensity values in a medical scan represent different tissue types and vary across both x and y dimensions.



Tiya Vaj

Ph.D. Research Scholar in Informatics and my passionate towards data-driven for social good.Let's connect here https://www.linkedin.com/in/tiya-v-076648128/