澳洲收看电视指南

大饼

原帖由 bulaohu 于 2008-7-30 21:15 发表
"数字的优点是可以运用数字技术增加加载的信息量"
I'll dispute that. The main point of using digital is that the signal quality does not deteriorate.

要么有要么无。

ranger

原帖由 bulaohu 于 2008-7-30 21:15 发表 [url=https://www.oursteps.com.au
"天线当然是越高越好"

Every 10m on the vertic ...

In a populated area, I  would venture to guess the most likely cause of a bad reception will be the nearby buildings, trees, terrains etc. that are blocking the line of sight from the antenna to the broadcasting tower. In that sense, I would suggest everyone to get their antenna as high (but still safe) as possible to work around it. Do correct me if I am wrong, as you obviously are a professional in this area. Thanks.

chu2008

谢谢分享。加分回报！

bulaohu

原帖由 ranger 于 2008-7-30 21:20 发表


Quote from  this government site:
"What are the benefits of digital television?

Digital television has many significant advantages over traditional analog television including superior image,  ...

exactly. As you see, the first advantage they point out is superior image. This comes from the non-deteriorate nature of the digital signal. You either get crystal clear signal, or you get nothing.

bulaohu

原帖由 ranger 于 2008-7-30 21:29 发表


In a populated area, I  would venture to guess the most likely cause of a bad reception will be the nearby buildings, trees, terrains etc. that are blocking the line of sight from the antenna to t ...

Reflections from nearby buildings etc is the cancer for analog signal and can result in really annoying ghosting, but for digital signal, signal strength is everything. Ghosting does not exist because reflected signals are filtered out completely. That's why I'd always prefer signal strength to other considerations with digital.

Sorry for appearing critical, if I am, that's because I believer this post is worth being added to the knowledge base. I thoroughly enjoyed your writing and I appreciate your contributions.

[ 本帖最后由 bulaohu 于 2008-7-30 21:42 编辑 ]

ranger

原帖由 大饼 于 2008-7-30 21:25 发表


要么有要么无。

I will second that, as I can testify that there are still glitches from time to time when you are watching digital TV programs, which is indicating some loss of data, i.e. deteriorating is occurring. Besides, I believe unlike TCP/IP protocol, TV broadcasting is a one-way lane. That means even if you digital tuner detects a bad corrupted data, there is no way for it to ask the broadcaster to resend the packet, it can only choose to drop the packet (hence the glitch on the screen). So I don't believe digital TV broadcasting can guarantee no deteriorated data. Having said that, I do believe it delivers a better reception quality as with digital, you can always deploy some sort of self-correction algorithm (maybe a CRC) which may help the tuner to recover the data to some extent. That's just my guess though.

Do correct me if I am wrong. Thanks.

ranger

原帖由 bulaohu 于 2008-7-30 21:32 发表


exactly. As you see, the first advantage they point out is superior image. This comes from the non-deteriorate nature of the digital signal. You either get crystal clear signal, or you get nothing ...

Um ... I would rather think the superior image comes from the bigger image (1920x1080), which is made possible by the capability of carrying more data thanks to the mpeg-2 compression standard. In future, with the deployment of more advanced mpeg-4 algorithm, I believe more data can be carried over same bandwidth and as a result more features will be come out.

Having said that, I absolutely agree with you on that either you get a perfect image or nothing. That is indeed the nature of digital signal.

Anyway, I guess my point is the loss/deterioration of data is unavoidable, unless a two-way conversation between the receiver and sender is possible. Actually that brings out an interesting question: I am wondering if that is the case with cable TV: for example, does Foxtel guarantee a flawless digital TV reception over their cable service? I can't tell as I don't have it installed. Maybe some one else here can come out and shed some lights.

Btw, I am by no means an expert in broadcasting industry, so feel absolutely free to correct me.

ranger

原帖由 bulaohu 于 2008-7-30 21:37 发表


Reflections from nearby buildings etc is the cancer for analog signal and can result in really annoying ghosting, but for digital signal, signal strength is everything. Ghosting does not exist bec ...

I absolutely agree with everything you said here. As a matter of fact, I will update the article to reflect what you have pointed out.

Obviously you are knowledgeable in this area, if not an expert. I much appreciate your opinion and enjoy the discussion with you.

Cheers.

hllihb

留名关注一下

胡桃夹子

专家呀...
原来电视也有这么多学问，汗一个。

ranger

原帖由 大饼 于 2008-7-30 20:56 发表
好像7和9收视率第一第二
sbs和abc排名末尾
澳洲的电视电影行业可以说是连第三世界也不如。
多数台靠美英电视剧和电影过日子。
sbs和abc要是没有新闻、top gear和烧菜节目就没人看了。
sbs和abc因为没拿到奥运会 ...

技术太boring了，还是谈论一下节目吧。:-)

节目好坏各人喜好不同，难以评价，见仁见智吧。比如Big Brother和其他的很多Reality Show， 我觉得无聊到了极点，可很多人就是喜欢看。而很多人对Desaparate Housewives 嗤之以鼻，我却看得相当起劲（我承认有一部分是因为看美女去的，鄙视一下自己）。

澳洲人口稀少，崇尚室外活动，本地电视制作相对落后也是可以理解的。他们的重点也不在电视剧的制作上。君不见周末footy时收视率有多高吗？

个人对ABC和SBS上的纪录片节目比较欣赏，包括前段时间ABC播送的Planet Earth, Wild China, SBS上的The Wehrmacht， Pacific War In Color以及最近正在转播的Tour De France等等都相当不错。我统统照单全收，录下存档。

友情小声推荐：SBS每星期六晚8：30的Big Love相当的有意思，建议各位韦小宝的Fans留意。:-)

lollyluo

恩，不错的帖子，学到好多东西啊

bffbffbff

好帖!

windix

多谢你的指南 :)
建议你还可以补充一些:

1. 关于HD Channel:
从去年中开始7, 9, 10的HD节目开始部分的有别于SD节目了(一般都是晚上9点以后以及周末), 提供一些专门的内容. 具体的可以参考Wikipedia上面的相关条目
http://en.wikipedia.org/wiki/Seven_HD
http://en.wikipedia.org/wiki/Nine_HD
http://en.wikipedia.org/wiki/Ten_HD

2. 关于收视率以及一些节目的预告,评价,推荐一个专门的blog:
http://www.tvtonight.com.au

ranger

原帖由 windix 于 2008-7-30 22:43 发表
多谢你的指南 :)
建议你还可以补充一些:

1. 关于HD Channel:
从去年中开始7, 9, 10的HD节目开始部分的有别于SD节目了(一般都是晚上9点以后以及周末), 提供一些专门的内容. 具体的可以参考Wikipedia上面的相关条 ...

Oh, yes, you are right. I forgot that as well.

谢谢，已加入正文。That blog site is a nice one.