9 replies to this topic

[alanh]

http://www.zetacast....Beyond_HDTV.pdf

AlanH

[bassett]

And if you want to wade through  80 odd pages of waffle, Good luck.

The facts are the report was written in 2009, and we all know haw fast things  change or progress.
But this statement from the writer is somewhat interesting.  In fact it's what one might call. the ultimate
in disclaimers,

Quote

  The report explores some possible scenarios for the broadcasting of stereoscopic TV and UHDTV
by terrestrial and satellite broadcasting, taking into account the likely developments in channel
coding and modulation.   Three scenarios for technology development are considered: most
probable, pessimistic and optimistic.  

[miata]

bassett, on 04 May 2012 - 02:15 PM, said:

And if you want to wade through  80 odd pages of waffle, Good luck.

The facts are the report was written in 2009, and we all know haw fast things  change or progress.
But this statement from the writer is somewhat interesting.  In fact it's what one might call. the ultimate
in disclaimers,

Well, standards for 4K and 8K have been announced, our five networks have completely screwed up HD, 4K and 8K will have them in knots! http://www.hdtvtest....01205281829.htm

[Serendigity]

Thanks for the link, was interesting reading. Our NBN (if it ever fully happens) would be the ideal way to deliver free or pay on-demand audio-visual content. They could then shut down the FTA TV air waves and devote all that spectrum to wireless portable device use.  By 2050 I don't think trad TV as we know it will even exist anymore...

[alanh]

Serendigity

By the end of next year all Australians in Australia will have access to 115 Mb/s of digital video and audio from 5 Free to air TV networks. This may increase to 209.125 Mb/s with a transmitter/receiver upgrade. The NBN is only 100 Mb/s so with multiple requests for Video on Demand the demand on the servers and transmission technology will rapidly increase.
Also the average viewer only wants to pay for VOD for programs they wish to continue to see Free to air TV for general viewing.

Alanh

[GoForMoe]

Can you identify the proposed technology to make a single video stream be transmitted in parts across different multiplexes? Adding the total among all the channels is totally meaningless when at best, a single stream on one multiplex at ~40Mbps would be possible even if all of your suggestions came true. Whether that is sufficient for UHDTV or not, it's still less than 100Mbps.

So what of watching multiple channels? Well luckily, while you're busy upgrading all the receivers and transmitters to DVB-T2, the NBN will well and truly be delivering the gigabit per second speeds it will actually do, not the 100Mbps that it does in AlanH's reality distortion zone.

Quote

The NBN will deliver high-speed fibre broadband access to 93 per cent of homes and businesses, capable of speeds of up to one gigabit per second.

http://www.minister....leases/2012/043

So the NBN would actually be able to deliver about the same bandwidth to each and every customer as if the entire amount of spectrum for delivering digital TV was used in the absolute optimum technical configuration of DVB-T2.

Not to mention, that in practical applications of TV over fibre, they use a distinct service from the internet side of things, so it isn't like users would be having slow internet while their TV streams, because they are distinct from eachother, and the use of multicast means the actual delivery isn't much of a load on the network.

Have a look into Verizon FIOS TV as a real world application of television over fibre.

[alanh]

For those who can read upto 16 pages
http://tech.ebu.ch/d...ports/tr014.pdf

AlanH

[GoForMoe]

alanh, on 09 June 2012 - 01:08 AM, said:

For those who can read upto 16 pages
http://tech.ebu.ch/d...ports/tr014.pdf

AlanH

Quote

4k is not yet included in the DVB standards

Quote

It is safe to say that large scale, mainstream, 4k broadcast production infrastructures will not be available for the next 3 - 5 years.

Any other points to take away from that document?

[alanh]

Yes,
1920 x 1080 x 50p is a significant low cost improvement many receivers already have displays which are already 1920 x 1080 resolution. This is achievable using MPEG-4 and DVB-T2.
These technologies are used for broadcasting in UK and other countries. All UK Freeview HD receivers are DVB-T2/T and MPEG-4/2

4k and 8K systems were originally designed to replace film in the cinema industry.

Whilst the EBU is predicting production infrastructures will not be available for 3 - 5 years. HEVC compression and higher resolution screens will also have to be manufactured at realistic prices for consumers. Whilst 70 mm film originals can be used as program sources there will be no other library of programs. This leaves live programs as a source. The costs will limit this to the Olympics, World Cup soccer and American football, Baseball finals etc. Eventually it will become common place as flat screen HD TVs.

What is not yet known is whether an MPEG-4 decompressor will decompress an HEVC signal at a lower resolution.

What is for sure is that we will not have large numbers of viewers watching 4 k programs in Australia in 5 years. The costs will be too high for broadcasters and viewers.

AlanH

[alanh]

All,
http://www.ericsson....sion-technology

Quote

Standardization is underway now, with a mid 2012 technically stable date and January 2013 completion.

For the same picture quality MPEG-2 data rate is 4 times that of HEVC.

Alanh