QUOTE(shaun_kok @ Nov 13 2024, 03:33 AM)
https://www.digitalbitrate.com/dtv.php?mux=...ive=363&lang=enInteresting to see that all the transmission data for Astro Satellite is released openly by a scanner in KL, on the famous digital bitrate website.
Of course, all services are encrypted - but transmission data is open to all to see.
Maybe someone can host a DVB-T terrestrial scanner in the future on that website?
Most transponders are on DVB-S2 @ 74Mbps.
The bitrate for each channel ranges from as low as 2.XMbps for some channels (1080i H.264), average 3-6Mbps, and would max up at 8Mbps - which explains the very poor picture quality.
Astro UHD channels is at 18.5Mbps/HEVC CBR + E-AC3 Audio, but we don't know if Astro is going to cut UHD bitrates when they launch more UHD linear channels (unlikely at this point).
For SD channels the bitrate is even lower, at the range of 1.x to 2.x Mbps. 8TV/TV9 is currently transmitting at 1.0Mbps (+ 352*576i combo, which explains the very poor picture quality that people are complaining here!)
Audio quality is 64kbps HE-AAC (AC3 5.1 audio is 384kbps)
For channels still on DVB-S, the channels have audio quality of 128kbps MP2. Radio channels are on 160kbps MP2.
Interestingly, the SD channels are still in the DVB-S transponder (including the old NJOI SD channels, which are still there), but CCM has moved to DVB-S2 transponder.
For comparison - HD bitrates for MYTV is 3.6Mbps-4Mbps (fixed), Unifi TV is 3.6Mbps (for most channels, including sport channels like SPOTV - this bitrate conclusion is after what I have measured over months - must be done to save data costs!)
Most transponders are on DVB-S2 @ 74Mbps.Almost all of their transponders are DVB-S2 with the FEC of 5/6. Only a few handful ones are uses FEC 3/4.
And there's 1 transponder is in DVB-S with the FEC of 7/8, and all are SD channels and radio channels.
The bitrate for each channel ranges from as low as 2.XMbps for some channels (1080i H.264), average 3-6Mbps, and would max up at 8Mbps - which explains the very poor picture quality.Looking at the video bitrate data for HD channels from Astro's transponders will not be accurate to be referred to, because they uses statmux method (variable bitrate), so the bitrate will always fluctuate according to the video scene.
The low bitrate number you see there, is likely because it is captured when the video scene of that HD channel doesn't have much motion, or a static image.
So if you compare this with MYTV's, definitely it is not accurate.
But the bitrate for Astro's UHD channel, yes, you can refer that. It is accurate because it is CBR.
but we don't know if Astro is going to cut UHD bitrates when they launch more UHD linear channels (unlikely at this point).Shhhhh... There could be Astro staffs here who is spying this thread. Don't give them such ideas, or else they'll propose this to the management as a way to "save cost"...
Then I will blame you first if that happens
8TV/TV9 is currently transmitting at 1.0Mbps (+ 352*576i combo, which explains the very poor picture quality that people are complaining here!)Can you elaborate what you meant by "+ 352*576i combo"? What is the video dimensions?
For channels still on DVB-S, the channels have audio quality of 128kbps MP2. Radio channels are on 160kbps MP2.For MP2 audio codec, 192kbps is the bare minimum. Anything lower than that, equals to rubbish audio quality...
I wonder who gave them the idea to use bitrate lower than 192kbps for MP2 audio codec