If you’ve ever seen full frame uncompress 625line SD with component 10-bit colour then you will know that sometimes resolution doesn’t matter. At a previous employer of mine we could show normal people pictures on a Barco Grade 1 monitor and they would swear it was HD. Freeview just has poor quality because the cost of carriage is so high, especially when there are a dozen versions of BBC One or ITV1 and they have to compress everything down to the n-th degree. The reason that regionalisation costs money is that we must have a cellular transmitter design, each region has it’s own frequency (or more than one because of relays), adjacent regions can’t use these frequencies because otherwise that would affect coverage. The UK design has many “guard” frequencies to protect adjacent transmitters in this way. If every region had the same channels they we could uses a system called an “SFN”, or Single Frequency Network, in this configuration the transmitters all transmit exactly the same thing at exactly the same time at exactly the same frequency. When transmitting in an SFN if you are between two transmitters you get the signal from both transmitters, but instead of causing a problem for you it actually helps because the two transmitters actually re-enforce each other.
Continue reading “UK Broadcasting and Local Multiplexes”
I’ve noticed a disturbing trend towards “turnover per head” in organisations, this means that an organisation will do anything it can to increase it’s turnover relative to the number of book employees. Even sacrificing employees to outsourcing because, while costs increase, the amount of money handled per-head has dramatically increased.
Continue reading “Outsourcing effectiveness”
On the BBC Internet Blog, Andy Quested has discussed the various issues around the addition of a test signal to BBC HD. It makes for very interesting reading, well worth it for anyone wanting to better understand their television and get a better picture.
I actually emailed Andy about one part of his article:
“The audio is actually two blocks of wood being banged once a second – nothing to beat the real thing!“
I emailed him to say that in college one of my much respected lecturers (Morgan Jones) proposed using a spark gap as a syncronisation source. Few things in nature are more instant than a spark and the correlation between the light and the light is absolute (subject to the speed of sound, etc).
His response was that he would look at it but he also raised another issue, how do you deal with the fact that an audio compression system based on the psycho-acoustic model might ignore such a short spike of audio? Frankly I don’t know, I am not sure I know enough about compression systems, but it seems worth a look.
Adrian Childs on the BBC’s coverage has asked what the medal table would look like if the gold was given three points, silver two points and bronze one point. So I found the data and have created a table for it here.
Feel free to maniplulate the data as you see fit.
We've been sitting here and curious about our new pages, so we've been looking at who was visiting. AND I am surprised to see someone from the BBC navigating our site, one of my old colleagues I suppose, but it was fun to watch their navigation. Disappointing that they voted 1 for one of my pages, thanks for the support!