Now Available: Tech Talk Podcast with Scott Wilkinson, Episode 19 Click here for details.
Originally posted by Richard Paul In Europe besides two satellite 1080i channels high definition is basically non-existent. There is no DVB standard for high definition and considering that they are currently switching to digital SD it would be dificult for many of the European countries to immediately switch to HD. As such it will take at least 5 to 10 years for HD to really start appearing in Europe. Japan would be considered just behind the US in HD and have both a broadcast and satellite standard. The broadcast standard is a little better than either ATSC or DVB and is called ISDB-T. This standard is capable of 18 Mbps and is better than even DVB in multipath reception. They also have ISDB-S which is their satellite standard at 24 Mbps. In Japan cable is somewhat rare so satellite is the main service provider. South Korea uses the ATSC standard and besides that I know little of how popular it is there. I do know that they are close to the US in HD broadcasting coverage and that they plan to have nationwide coverage by next year. They also made ATSC's DASE standard for interactive DTV which I believe they currently use. Australia is using 1080i as a format and though years ahead of Europe and most of the world in HD it would probably be considered 4th place in HD behind the US, Japan, and South Korea. The ATSC Forum has a lot of information on the ATSC standard and the countries that use it. |
In Europe besides two satellite 1080i channels high definition is basically non-existent. There is no DVB standard for high definition and considering that they are currently switching to digital SD it would be dificult for many of the European countries to immediately switch to HD. As such it will take at least 5 to 10 years for HD to really start appearing in Europe. |
There is DVB HD standard. That is what is used in Australia. Picture resolutions really have no baring on a standard. DVB or ATSC can carry the same data. They just differ, how it is delivered. |
Originally posted by Richard Paul Australia uses the ATSC standard with DVB transmission. Without standards you can't successfully make a format and though DVB can carry SD it has no standards for HD. Europeans are only now studying the issue of an HD standard for DVB and it may be years before a HD DVB standard is created. |
Originally posted by thegeby I think you may be missing part of the point of DVB. There is a number of working groups in DVB, looking at extensions of the standard. The concept is modular, so that DVB-S, DVB-T and DVB-C share most of the standard, with tuning/demodulation/error correction differentiated. The working group on AVC is developing the technical part of advanced compression techniques. The equivalent Commercial Module is looking at demand and deployment prospects. These are only two of many commercial/technical module pairings looking at different development strategies. You are probably right about the time-frame, though. It is unlikely that Europe will use MPEG-2 for HDTV and the advanced codecs (VC-1, MPEG-4 AVC and others) are only just becoming stable and performing enough. Studio equipment is available in SD, but needs to be able to encode into the advanced codec in HD realtime. This will probably happen in 2005. |
No they do not. Australia uses DVB period. I do not think you understand what is ATSC and DVB standard. Picture resolutions like 1080i50/60Hz and 720p50/60 are universal and are part of either standard. Though Australia uses 1080i50Hz or 576p50 which is ED. They do not as of now use 720p. |
As a matter of fact ATSC already adopted VC-1 as an extra codec. |
The ATSC and DVB standards are more than just the transmission standard but are also specify how the data is sent. Since the DVB standard had no specification for carrying HD I heard that Australia used some elements of ATSC for how the data would be sent. There is a big difference in DVB transmission and the DVB standard and currently Australia does not really use the DVB standard. They can broadcast at 1080i with Dolby Digital audio which no other DVB receiver outside Australia could receive. |
Originally posted by thegeby Sorry, No again... Although DVB has MPEG-2 audio as the main audio implementation, you can easily use AC-3 within the standard. Several European satellite channels use AC-3 for 5.1. movies as the Dolby amplifier equipment is used here on DVDs. It is very common to have both codecs implemented in the standard receiver hardware chip, although it would be marginally cheaper to only implement MPEG-2. My satellite receiver has no problem with either. I really recommend AVS members to take a gander at the DVB website. The concept is entirely different from the ATSC imposition of specific technology and in my view much more future proof. TV over mobile phones? TV over IP? Mobile handheld TV? They are working on all of it. Compared to the difficulties the US has to combine HD cable and HD OTA in a single receiver, it does seem more efficient. |
Originally posted by Richard Paul The ATSC and DVB standards are more than just the transmission standard but are also specify how the data is sent. Since the DVB standard had no specification for carrying HD I heard that Australia used some elements of ATSC for how the data would be sent. There is a big difference in DVB transmission and the DVB standard and currently Australia does not really use the DVB standard. They can broadcast at 1080i with Dolby Digital audio which no other DVB receiver outside Australia could receive. This is why a HD DVB standard will have to be made since it isn't a minor modifaction to change from a SD decoder to a HD decoder. Only for supplemental material. It can't be used in the main video stream and can only be used in E-VSB (Enhanced VSB) mode. Also the E-VSB mode can never exceed the resolution of the main video stream and is limited to 3 Mbps during premium programming hours. This information can be found on page 100 of the ATSC A/53 Revision C standard . |
Also going from SD to HD decoder is not minor. It is much more complicated than you think. Now, it is not a problem though as HD elementary streams are identical for ATSC and DVB. |
The Video Bitrate is more than US HDTV do. Currently the airing Programes have like 22/23 mbit/s just Video Signal, so that you have 27 mbit/s in total with ac3 5.1. |
Sky UK will start HDTV in 2006 or earlier with 7 Channels. |
Originally posted by Richard Paul In Europe besides two satellite 1080i channels high definition is basically non-existent. There is no DVB standard for high definition and considering that they are currently switching to digital SD it would be dificult for many of the European countries to immediately switch to HD. As such it will take at least 5 to 10 years for HD to really start appearing in Europe. |
Originally posted by DougMan The Formula 1 will in HDTV by 2006 i guess. In a PR of the german Pay TV Provider PREMIERE you can read: "Our main Events on Sport HD in 2006 will be the Formula One, Soccer World Cup 2006 and the Olympics. We will bring all these Events 2006 in HDTV." DougMan |
Originally posted by Richard Paul In the UK the bit rate is around 13 Mbps to improve reception and for OTA broadcasting DVB's maximum is around 18 Mbps. Also AC3 has a maximum bit rate of 640 Kbps (576 Kbps maximum on ATSC) with 448 Kbps being the commonly used bit rate. ATSC has a maximum bit rate of 19.8 Mbps with a video bit rate of up to 19.4 Mbps with a 448 Kbps audio bit stream. [/b] |