C++ and Digital Signal Processing



Digital signal processing (DSP) is a method of working with digitized real-world signals such as audio, images, temperature, and so on. C++ is a fantastic programming language for DSP. C++ is a programming language that was created as an extension to the C programming language. C++, like its parent C, is one of the oldest programming languages still in use today. And DSP is one of its most intriguing applications!


There are five good reasons to use C++ for DSP.


1. Getting closer to the hardware in terms of coding

Because DSP is so intimately linked to hardware, it’s advantageous to use a language that can also code close to the hardware. C++ allows us to communicate directly with hardware and optimize performance. This is ideal for DSP applications that require a high level of speed and efficiency. C++ allows us to reduce CPU overloading and latency by having fewer guardrails than higher-level languages. We can fine-tune the way a computer’s hardware processes signals to improve performance and CPU use, in addition to designing and altering DSP algorithms. This allows DSP programs to function seamlessly on any device, even if the hardware has limited storage or has restricted power.


2. Memory management that is dynamic

The way a program uses computer memory is referred to as memory management. Because C++ uses dynamic memory management, we must manually specify where and how memory is stored and released.  Memory management that is automatic rather than dynamic consumes more memory and CPU power. Memory management in C++ enables even larger-scale programs to be optimized. Because DSP generates a large amount of data that must be sorted and saved, C++ saves important memory space and speeds up processing.


3. Fixed-point math support

Fixed-point arithmetic capability is critical in a DSP language since we frequently convert floating points to fixed points when optimizing DSP. The decimal point in fixed-point data is always at the same place for each number, whereas the decimal point in floating-point data can be in any position relative to the numerical value. Fixed-point math makes algorithms more portable and reduces the amount of electricity required to run them. Converting from a floating-point to a fixed point can be a time-consuming and error-prone process. C++, on the other hand, contains capabilities that make the conversion from floating points to fixed points easier. We still end up with maintainable code, fewer errors, and the ability to alter decimal point placements automatically.


4. Object-oriented programming (OOP)

Object-oriented programming is supported by C++ (OOP). The object-oriented programming paradigm allows us to represent a system as a collection of manipulable objects. We may remove redundancies and hence design apps with less code when we use object-oriented programming. OOP allows us to change and reorganize code much more easily. To process a signal, DSP applications frequently mix numerous filters. Because each filter is represented as an object, it is simple to remove or reorganize them.


5. Rather of being understood, the data is compiled.

C++ is a compiled programming language that aids in application performance. Compile-time languages are often faster than interpreted-time languages. While some interpreted languages, such as Python and MATLAB, are also suitable for DSP, they take longer to execute than compiled languages like C++. Because we know that speed is a critical requirement for DSP applications, C++’s compiled nature works in our favor.



Conclusions and Next Steps

C++ is a wonderful language to learn if you’re just starting out as a developer and have an interest in DSP. Because of its broad use, you can always use your C++ skills to assist in the development of additional resource-intensive apps for different sectors. The C++ for Programmers learning route was intended to assist you in mastering the C++ programming language. This course covers basic to intermediate C++ principles, such as templates, object-oriented programming approaches, and embedded programming fundamentals.