I put it out there for someone to tell us how to truly measure image quality that factors in the encode and decode.
Tue, 06/10/2009 - 12:11pm | Tim Norton
Following Linkedin thread
I have to agree that TVL is an analogue standard but what ACCURATE measure do we have in digital video.
Pixel count - Yes higher is better but if the compression is poor, the image will not be clear
Compression type - That is a mine field that talks about how we can implement a tool set of compression types but not which we should use to get the best result.
EG H.264 with no motion estimation is much the same as MJPEG but it technically is H.264 compliant
In the TV world, HD 720p and 1080p are broadcast to some common standard I would believe.
ONVIF members demonstrate interoperability at open reception in Anaheim, CA
Thu, 08/10/2009 - 10:18am | Tim Norton
- 146 visitors at ONVIF open reception in Anaheim
- 14 interoperable products from 9 companies were demonstrated
ONVIF held an Open Reception on September 22 at the Sheraton Hotel in Anaheim, California in conjunction with the ASIS trade show. The 146 participants from 58 companies heard ONVIF Chairman Jonas Andersson talk about ONVIF's accomplishments during its first year of operations and the forum's outlook for 2010.
IndigoVision IP PTZ’s
Sun, 01/11/2009 - 6:45am | Tim Norton
See the latest in IP video excellence
An integration of excellent sensors and world class H.264 compression delivers a milestone in the evolution of IP video.
False Ceiling Mount
Virtual Matrix allows for a 9800 camera video wall
The latest enhancements in IP-video have resulted in removing the need for high cost, custom build video walls.
Instead a video wall can be build from an array of PC workstations, each with 4 monitors, controlled from master workstations. A total 98 slaves can be controlled from one or more masters, making the total number of cameras that can be viewed 9800.
Instead a video wall can be build from an array of PC workstations, each with 4 monitors, controlled from master workstations. A total 98 slaves can be controlled from one or more masters, making the total number of cameras that can be viewed 9800.
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Tags: News
Tags: News
Redundancy and Reliability in IP Video Systems
Wed, 28/07/2010 - 2:17pm | Tim Norton
Recently I was invited to present an IP Video solution as an alternative to an analogue matrix in a 24/7 control room. The target client has been using analogue matrix switchers for the past 15 years and had some concerns about the ability of an IP based system to give the same results.
The specific concerns were:
- Reliability
- Latency of PTZ control
- Ability to recover from a major failure
Can You Pick The Better Image?
Defining image quality of a camera was once an easy task. We could state the number of lines resolution and get a fairly consistent result between 2 products.
That all changed when CCTV moved away from analogue and started recording in digital. The resolution of the camera remained consistent but the recorded quality varied depending on how it was compressed and stored on a DVR. Now with IP CCTV becoming the norm, the ability to define what is good and bad has become even harder to measure and state on a written document.
Take for example the following 2 images. Which one is the better quality?
It’s obvious isn't it! The one from Camera 2 is.