# HD Broadcasting **URL:** \ **Category:** General Television Topics\ **Created:** [December 28, 2015, 8:07am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279 "2015-12-28T08:07:50Z")\ **Posts on this page:** 20\ **Page:** 56
**Author:** ![TV.Cynic](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/tv.cynic/32/316932_2.png) [@TV.Cynic](https://forums.mediaspy.org/u/TV.Cynic)\ **Post date:** [January 20, 2017, 11:45am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1111 "2017-01-20T11:45:01Z")
I’ve been looking at the bit rates on the various multiplexes and I believe that the networks can fit in more HD broadcasts now without shutting down any legacy MPEG2 format. My thinking is that a 720p HD MPEG4 broadcast would be suitable for a multichannel. Looking into the numbers, 720p needs fewer bits to be transmitted per second plus more importantly the progressive stream apparently compresses better. I think that a 2.5 - 2.8 Mbps 720p stream would provide a quality HD channel. So if we took Nine’s multiplex in Brisbane tonight 9HD in 1080i is running at 3.26 Mbps. The other channels are 9SD 4.0 9Go 3.3 9Gem 3.3 9Life 3.8 So all that needs to happen is 0.625 - 0.7 reduction in bit rate for each channel to give 2.5 - 2.8. In the case of SBS, SBS HD is currently running 7.5 (MPEG2) so they could replace that with 3 x 720p HD channels without having to adjust the bit rates for any of the SD channels. ---
**Author:** ![SydneyCityTV](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/sydneycitytv/32/66248_2.png) [@SydneyCityTV](https://forums.mediaspy.org/u/SydneyCityTV)\ **Post date:** [January 20, 2017, 11:50am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1112 "2017-01-20T11:50:45Z")
Are broadcasting encoders really good enough these days that you can broadcast three 720p MPEG2-HD channels on a multiplex at 2.5-3.0mbps without it becoming all pixelated/blurry every five seconds? ---
**Author:** ![TV.Cynic](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/tv.cynic/32/316932_2.png) [@TV.Cynic](https://forums.mediaspy.org/u/TV.Cynic)\ **Post date:** [January 20, 2017, 12:06pm UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1113 "2017-01-20T12:06:01Z")
They would be 720p MPEG 4 - 9HD is currently running at 3.2 1080i whithout too many complaints so I think it is realistic. ---
**Author:** ![Radiohead](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/radiohead/32/21429_2.png) [@Radiohead](https://forums.mediaspy.org/u/Radiohead)\ **Post date:** [January 20, 2017, 6:02pm UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1114 "2017-01-20T18:02:00Z")
As I understand it, networks can accommodate 23 M/bits per second of data on each channel. The streams you’ve listed there add up to approx 17.7 M/bits. Can see you where the other 5.3 has gone? Some small amounts of data might be taken up by closed captions and EPG info, but as I don’t think there’s any error correction used in DVB-T, there’s no slideshows (both of which accounts for space in DAB+ Radio), and there’s no EPG channel anymore. ---
**Author:** ![webguy](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/webguy/32/4778_2.png) [@webguy](https://forums.mediaspy.org/u/webguy)\ **Post date:** [January 20, 2017, 8:53pm UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1115 "2017-01-20T20:53:15Z")
> [@Radiohead](#): > > Can see you where the other 5.3 has gone? Some of it will be used by the audio channels aswell. ---
**Author:** ![TV.Cynic](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/tv.cynic/32/316932_2.png) [@TV.Cynic](https://forums.mediaspy.org/u/TV.Cynic)\ **Post date:** [January 20, 2017, 10:48pm UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1116 "2017-01-20T22:48:38Z")
The various audio channels add up to approx 3.7 and Extra is 1.8 for video ---
**Author:** ![stilesykenny](https://forums.mediaspy.org/letter_avatar_proxy/v4/letter/s/b5a626/32.png) [@stilesykenny](https://forums.mediaspy.org/u/stilesykenny)\ **Post date:** [January 24, 2017, 4:44am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1117 "2017-01-24T04:44:31Z")
I’ve noticed that too, Nine SD via WIN at times looks terrible, but funny enough Seven SD & other channels looks okay. ---
**Author:** ![Radiohead](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/radiohead/32/21429_2.png) [@Radiohead](https://forums.mediaspy.org/u/Radiohead)\ **Post date:** [January 27, 2017, 6:47am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1118 "2017-01-27T06:47:11Z")
Good news so far on the 7HD front for Sydney (and I’m guessing Bris and Perth as well)… In that my EPG is still showing 7HD will remain as the main channel for most of next week (at least). So will be good to see Seven’s big guns eg. MKR in HD for the first time in these parts 😀 ---
**Author:** ![TV\_Addict](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/tv_addict/32/317_2.png) [@TV\_Addict](https://forums.mediaspy.org/u/TV_Addict)\ **Post date:** [January 27, 2017, 7:24am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1119 "2017-01-27T07:24:12Z")
Are you saying 7HD is still there after the tennis has finished? When does the AFL season begin again? ---
**Author:** ![Rob2144](https://forums.mediaspy.org/letter_avatar_proxy/v4/letter/r/6a8cbe/32.png) [@Rob2144](https://forums.mediaspy.org/u/Rob2144)\ **Post date:** [January 27, 2017, 7:33am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1120 "2017-01-27T07:33:03Z")
> [@TV\_Addict](#): > > When does the AFL season begin again? March 23 ---
**Author:** ![TV-ACT](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/tv-act/32/167823_2.png) [@TV-ACT](https://forums.mediaspy.org/u/TV-ACT)\ **Post date:** [January 27, 2017, 7:39am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1121 "2017-01-27T07:39:54Z")
Didn’t Seven switch back early last time so that the pre-season matches were shown on 7bogan HD? 😈 ---
**Author:** ![SydneyCityTV](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/sydneycitytv/32/66248_2.png) [@SydneyCityTV](https://forums.mediaspy.org/u/SydneyCityTV)\ **Post date:** [January 27, 2017, 7:40am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1122 "2017-01-27T07:40:36Z")
Seven’s HD channel wasn’t in MPEG4 this time last year… ---
**Author:** ![TV-ACT](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/tv-act/32/167823_2.png) [@TV-ACT](https://forums.mediaspy.org/u/TV-ACT)\ **Post date:** [January 27, 2017, 7:44am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1123 "2017-01-27T07:44:16Z")
Will that make a difference? After they switch back are they going to have two 7bogans, 576i MPEG2 & 1080i MPEG4? Of course I’d prefer 7HD remained and 7flix & 7bogan were MPEG4 (perhaps 720p?) but I don’t see Seven changing what they’re doing. ---
**Author:** ![SydneyCityTV](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/sydneycitytv/32/66248_2.png) [@SydneyCityTV](https://forums.mediaspy.org/u/SydneyCityTV)\ **Post date:** [January 27, 2017, 7:49am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1124 "2017-01-27T07:49:04Z")
Yeah, me neither. Personally I’d prefer to have Seven’s main channel here in Sydney on a permanent basis (even though not much of Seven’s programing appeals to me in general), but I suppose that 7Bogan…I mean, 7mate is “The Best Channel In The World Ever” and that any TV station with such a title deserves to be seen in full 1080i HD. 🙄 ---
**Author:** ![TV-ACT](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/tv-act/32/167823_2.png) [@TV-ACT](https://forums.mediaspy.org/u/TV-ACT)\ **Post date:** [January 27, 2017, 8:02am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1125 "2017-01-27T08:02:19Z")
I hope they’re not airing that ‘best channel’ promo on the SD channel in Melbourne, etc! Well no doubt I’ll hear/read on here the (justified) howls of protest when 7HD disappears again. Of course I haven’t received any response to my complaint to Prime7 about the lack of 7HD (resulting in the AusOpen being shown in SD, nor from WIN about the monstrosity dubbed ‘Mappy’). The sad thing is with 4k UHD TVs already being sold here not only is there almost no UHD content - and I gather than 1080 HD content looks…bad on UHD TVs (similar to SD on a HD TV I guess) - but most channels are still SD (I know Foxtel are doing better, and Netflix is great, but still…). Sooner or later the networks will have to push MPEG4 a bit more (maybe next summer?), switch their least popular channels to it first (perhaps test it in a particular market), stick with it for more than a couple of months & see how little complaints there are, then the next least popular channel, etc. (Probably a bit of wishful thinking on the timing.) ---
**Author:** ![TV\_Addict](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/tv_addict/32/317_2.png) [@TV\_Addict](https://forums.mediaspy.org/u/TV_Addict)\ **Post date:** [January 27, 2017, 8:12am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1126 "2017-01-27T08:12:39Z")
I still can’t believe 7Flix reverted to MPEG-2. ---
**Author:** ![MichaelPower](https://forums.mediaspy.org/user_avatar/forums.mediaspy.org/michaelpower/32/499507_2.png) [@MichaelPower](https://forums.mediaspy.org/u/MichaelPower)\ **Post date:** [January 27, 2017, 8:13am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1127 "2017-01-27T08:13:10Z")
Anything to get more viewers even though i disagree with the idea. ---
**Author:** ![Bluejays1985](https://forums.mediaspy.org/letter_avatar_proxy/v4/letter/b/13edae/32.png) [@Bluejays1985](https://forums.mediaspy.org/u/Bluejays1985)\ **Post date:** [January 27, 2017, 8:17am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1128 "2017-01-27T08:17:49Z")
Can confirm the 7HD guide goes to at least Thursday on my epg. I’m in perth. It could all mean nothing seven may switch to 7bogan HD straight after the tennis on Sunday night. How hard is it really to have some sort of clarification ? Apparently it’s really hard. ---
**Author:** ![WATV](https://forums.mediaspy.org/letter_avatar_proxy/v4/letter/w/b487fb/32.png) [@WATV](https://forums.mediaspy.org/u/WATV)\ **Post date:** [January 27, 2017, 9:56am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1129 "2017-01-27T09:56:31Z")
Just check epg and perth still has 7hd next Friday Feb 3 Footy on mate in sd ---
**Author:** ![Bluejays1985](https://forums.mediaspy.org/letter_avatar_proxy/v4/letter/b/13edae/32.png) [@Bluejays1985](https://forums.mediaspy.org/u/Bluejays1985)\ **Post date:** [January 27, 2017, 10:36am UTC](https://forums.mediaspy.org/t/hd-broadcasting/279/1130 "2017-01-27T10:36:24Z")
Think the epg guide will change the feed back to 7mateHD next week 😛😛 [Previous page](https://forums.mediaspy.org/t/hd-broadcasting/279.md?page=55) [Next page](https://forums.mediaspy.org/t/hd-broadcasting/279.md?page=57)