“Analogue” and “IP” get presented as old versus new, which flatters IP into looking like the automatic upgrade. It is often the right choice. It is not automatically the right choice, and the cases where analogue remains correct are common enough that we still install it regularly.
The real difference is where the image is processed
An analogue camera sends a raw video signal down a coaxial cable to the recorder, which does the digitising and compression. An IP camera digitises and compresses the image inside the camera itself, then sends a data stream over network cable. That single architectural difference is the root of every practical trade-off below - it is not a difference in image quality by itself.
What IP genuinely does better
- High resolution on a wide scene. Reading a number plate at a gate, or covering a large yard with one camera instead of several, is where IP earns its premium.
- Single-cable installation. Power and data over one network cable per camera, rather than separate power and coax runs.
- Easier expansion. Adding a camera to an IP system is a network port. Adding one to an analogue system is a new cable run to the recorder.
- Analytics. Line-crossing, loitering and similar features are more mature and more widely available on IP cameras.
Where analogue is still the honest answer
An older house or a small shop with usable coaxial cabling already in the walls. Modern analogue formats reach resolutions that are genuinely sufficient for identifying a face at the gate or a person on a porch, which is what most domestic systems are actually asked to do. Recommending an IP rewire here means charging for cable the site does not need to gain resolution the site will not use.
It is also the right call when replacing a handful of failed cameras on an otherwise working analogue system. Changing architecture to fix two cameras is a poor use of the budget when the other six are functioning.
The resolution number that misleads people
Megapixel figures get compared directly between the two formats as if they mean the same thing, and they do not translate cleanly because compression, sensor size and lens quality all vary independently of the number on the box. A well-specified 2MP analogue camera on a well-lit entry frequently outperforms a poorly specified 4MP IP camera in a dim corridor. The number on the spec sheet is one input, not the answer.
The reliable test is the same one we recommend for any camera regardless of format: look at a night sample and a daytime sample from a comparable installation, not the resolution figure alone.
How to decide without being sold to
Three questions settle it in most cases:
- Is there usable cabling already in place? Coax that works favours analogue; new construction with nothing run yet removes the cost argument for IP.
- Does any position genuinely need to read detail across a wide or long scene? A gate for plate reading, a large yard - IP earns its keep there specifically, not everywhere.
- Will the system expand in phases over the next few years? IP makes each phase cheaper; analogue makes the first phase cheaper.
A quote that recommends IP throughout without asking about your existing cabling is quoting a preference, not a specification.
Common questions
Can analogue and IP cameras share one recorder?
Yes, on a hybrid recorder built to accept both. This is a practical way to keep working analogue cameras on existing coax while adding IP cameras on new cable runs, and it is the sane upgrade path for a system being modernised in stages rather than replaced outright.
Is IP always more expensive to install?
Not if the cable is being run anyway - the marginal cost of network cable over coax is small on new construction. It becomes more expensive specifically when it requires rewiring an occupied building that already has usable coax, because the rewire itself, not the cameras, is the real cost.
Do IP cameras need a stronger network setup?
They need a switch with enough ports and power budget if using power-over-network-cable, and a recorder or NVR that can handle the combined bandwidth of every camera at once. On a small home system this is straightforward; on a larger one it is a sizing calculation worth having an installer do rather than guessing.