Andrew Everard:
That there has been a bit-rate drop is not alleged, but real, the BBC saying that new encoders have enabled it to maintain quality while using lower bitrates.
What is alleged by some is that this has led to a lowering of picture quality, and frankly having watched a lot of the rugby over the weekend, plus
Tropic of Cancer and the latest episode of Prof Brian Cox's superb series, I just don't see that lowering of quality.
With the greatest respect Andrew if you've not seent he quality drop, then you've been watching too much Sky tv.
The quality drop has been marked.
Granted some programmes have managed to maintain quality, probably down to subject matter and the way its been shot and post processed, Tropic of Cancer is certainly one of the better ones. However, many others are so bad that they don't even look HD and some others look HD but very poor.
Raymond Blanc's Kitchen Secrets is one very good example of BBC HD that doesn't even look HD except on macro shots of the food. The general kitchen shots and shots of Raymond preparing the food look extremely blurry and SD in appearance.
Countryfile on Sunday 21st March also looked poor. The ice climbing was absolutely terrible quality. The punchy colours of the climbers jackets provided brief spells of relief from a picture that was blurry and extremely undetailed. In shots of rock next to ice, not detail or grain could be seen in the rock whatsoever. The ice was a white blur and close ups of the faces of the participents were blurry. Similarly the story on the missing bridge and the farmer with Jon Craven that followed afterwards, had blurry undetailed faces. I didn;t watch any further but just switched over and watched Zathora a Space Adventure!!!!!
Also on the 21st March, Leicester vs Coventry suffered from terrible motion blur and close ups of the players revealed blurry and detail less faces.
Another interesting fact is that I understand from other's posts on the BBC HD forums the EBU (European Broadcasting Union) recommend a minimum bit rate of 12mbs for HD on the latest encoders compared to BBC HD's 9.8mbs bit rate.
Also recently SES Astra became involved indirectly when they made a statement that HD broadcast on their satellites at below 12mbs results quality in complaints about softness:
http://www.techwatch.co.uk/2010/03/12/ses-astra-says-hd-quality-suffers-when-bit-rate-is-cut/