Southborough, Kent · TN4
CCTV image showing distortion or colour banding: causes and fixes
Correct a warped or oddly coloured camera picture. This page covers the causes worth checking on HD-over-coax CCTV systems, what you can safely check yourself, and what an engineer does on the visit.
- Fault: cCTV image showing distortion or colour banding
- System in view: HD-over-coax CCTV system
- Priority: safe to handle as planned work
Symptom
Picture appears stretched, warped or fish-eyed unexpectedly
Check first
Note whether the camera uses an analogue coaxial connection or a network cable
Likely cause
Bitrate set too low for the resolution
How this shows up
Put plainly, the goal is that correct a warped or oddly coloured camera picture.
- Picture appears stretched, warped or fish-eyed unexpectedly
- Colour bands or blocky artefacts appear across the image
Root causes, in the order we test them
- Bitrate set too low for the resolution
- Compressing a high-resolution stream into too small a bitrate causes blocky artefacts, particularly during motion.
- Cable or connector fault causing signal noise
- A degraded analogue video connection introduces visible banding and colour noise that a digital connection would not show in the same way.
CCTV repairs
- Repairs to systems we did not install
- Recording and offline camera fault diagnosis
- Advice on repair or replacement
Safe checks before booking anyone
These are observation jobs rather than repairs, so there is no risk in working through them.
- 1Note whether the camera uses an analogue coaxial connection or a network cable
- 2Compare the affected camera's picture with another camera of the same model
How we put it right
Timing-wise: safe to handle as planned work.
- 1Replace the camera where a sensor fault is confirmed
- 2Adjust lens correction and stream settings to match the scene properly
On HD-over-coax CCTV systems, the parts that matter here
The reason this matters: a HD-over-coax CCTV system fails in a different order to other kit.
- HD analogue cameras
- Modern image quality on the cabling that is already there.
- Digital video recorder
- Converts and records the incoming analogue streams.
The honest boundary here
Fewer advanced analytics than IP equivalents. Connector condition at both ends is the usual failure point, so terminations are worth checking at each service.
The consequence on a purpose-built block
- Underground or covered parking access shared by residents
- That is the access route that needs to be covered reliably, which is why cCTV image showing distortion or colour banding there is worth fixing rather than living with.
- Door closers and alarms on secondary and fire exits
- Stops doors being left open for convenience by making it obvious and, where fitted, audible if a door stays open too long.
So it does not happen again
Match camera settings to the scene at install and revisit them if the field of view or lighting changes significantly.
Southborough context
In Southborough (TN4) we work regularly around London Road and Speldhurst Road. High Brooms station and the A26 to Tunbridge Wells.
Want a professional to handle it?
Related services
- CCTV repairs
- CCTV installation
- Security system repairs and maintenance
- WiFi installation and coverage fixes
Covering Chatham, Medway, Kent & South East London
Southborough questions we get asked
CCTV image showing distortion or colour banding: causes and fixes
Local detail for Southborough
- Faults diagnosed before parts are ordered
- Cabling, containment and making good carried out in-house
- Quotations itemised so each part can be questioned
Talk it through before booking
Send a photo of the fault text or the screen and we will tell you what we think it is before anything is booked.
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