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 Digital TV Malaysia v2, Malaysian Digital Terrestrial TV

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surrodox2001
post Feb 6 2021, 10:29 PM

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According to the bitrates, the HD bitrate is only ~70% more than SD, so this puts it into something like Youtube HD quality, which has the bitrate of ~3-5Mbps, not terrible, not great either.

The SD quality is however, better than Youtube's, so that's a plus i guess?

In the end, with the introduction of TV Sarawak (TVS), i think MYTV should open another mux for local/extra if these kind of channels pop up more later.

ps: As for sound quality, i can't tell much because im not an audiophile biggrin.gif

This post has been edited by surrodox2001: Feb 6 2021, 10:29 PM
Qash-M
post Feb 6 2021, 10:31 PM

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QUOTE(joshhd @ Feb 6 2021, 10:20 PM)
Malaysia Digital TV Bitrate Check
6 Feb 2021

MUX 1: 666MHz (Channel 45)
user posted image    user posted image
Video bitrate:
HD = 4.1Mbps
SD = 2.1Mbps
Audio bitrate for TV & radio channels: HE-AAC v2 32kbps Stereo

MUX 2: 650MHz (Channel 43)
user posted image    user posted image
Video bitrate:
HD = 3.65Mbps (CBR 3.5Mbps, according to MediaInfo)
SD = 2.1Mbps

Audio bitrate for RTM TV channels: HE-AAC 48kbps Stereo
Audio bitrate for RTM radio channels: HE-AAC 112kbps Stereo
*
Expecting one more new channel on RTM mux soon. Also, wtf the audio quality still is inequal between gov channels and Private one.
surrodox2001
post Feb 6 2021, 10:33 PM

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QUOTE
Expecting one more new channel on RTM mux soon


Hmm, what would that be?

QUOTE
wtf the audio quality still is inequal between gov channels and Private one


MP invest less in audio quality i guess? biggrin.gif

This post has been edited by surrodox2001: Feb 6 2021, 10:33 PM
joshhd
post Feb 6 2021, 10:58 PM

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QUOTE(Qash-M @ Feb 6 2021, 10:31 PM)
Expecting one more new channel on RTM mux soon. Also, wtf the audio quality still is inequal between gov channels and Private one.
*
QUOTE(surrodox2001 @ Feb 6 2021, 10:33 PM)
Hmm, what would that be?
MP invest less in audio quality i guess? biggrin.gif
*

The upcoming channel to be launched by RTM would be somehow the "return" of TV Pendidikan?
Read more here: https://themalaysianreserve.com/2021/01/25/...ls-on-rtm-soon/
QUOTE
THE Communications and Multimedia Ministry (KKMM) is expected to launch the free-to-air TV Pendidikan, a cluster of educational television (TV) channels via its broadcasting arm Radio Televisyen Malaysia (RTM) within the next two months.

“As of now, RTM is conducting some testing of these (new TV) channels, but I cannot reveal the name yet as it is too early. But we are ready to carry out the role for TV pendidikan, be it during the Covid-19 or the post-Covid-19 period,” Saifuddin told the press after attending a virtual media conference of the Asean Digital Ministers’ Meeting last Friday.

TV Pendidikan is said to be a better alternative platform for students in primary and secondary schools nationwide compared to online learning methods.

It is expected to tackle the issues of limited Internet connectivity, lack of gadgets and non-conducive households that make online learning more exclusive.
-----
I do wonder why the video and audio bitrate used in both muxes are not standardised, despite that both muxes are managed by the same MYTV Broadcasting.
It could be the engineers "overlooked" that part, or just choose not to care about that, as long "got picture and sound appear on TV then can already."

Until today, the HD channel bitrate for mux 1 and mux 2 is different... One is 4Mbps, another is 3.5Mbps CBR. shakehead.gif
Audio bitrate also... One is 32kbps HE-AAC v2, another is 48kbps HE-AAC and RTM radio channels is 112kbps. shakehead.gif

Each MYTV mux has a total bandwidth of 34Mbps. How many more of already-low-bitrate channels they want to squeeze in this 2 muxes? doh.gif
Even a slight 1Mbps increase per HD channel bitrate can bring significant improvements in video quality.
For audio bitrate, I suggest they might as well just standardise all TV and radio channels into at least 112kbps (same as RTM radio channels now), or 128kbps AAC-LC.
MYTV using such way low bitrates make it look they are being too kedekut doh.gif
joshhd
post Feb 6 2021, 11:03 PM

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QUOTE(surrodox2001 @ Feb 6 2021, 10:29 PM)
According to the bitrates, the HD bitrate is only ~70% more than SD, so this puts it into something like Youtube HD quality, which has the bitrate of ~3-5Mbps, not terrible, not great either.

The SD quality is however, better than Youtube's, so that's a plus i guess?

In the end, with the introduction of TV Sarawak (TVS), i think MYTV should open another mux for local/extra if these kind of channels pop up more later.

ps: As for sound quality, i can't tell much because im not an audiophile biggrin.gif
*

For that, I rather see they slightly reduce the bitrate for SD channels, and then in exchange, slightly increase the bitrate for HD channels.
Why? Because SD quality will still look SD quality no matter how high the bitrate you use.

For HD channels however, you will see much improved HD picture quality when the bitrate is higher, especially in fast motion/changing/movement scenes. As a result, much better viewing experience. biggrin.gif

For the audio, well, YouTube's audio bitrate is 128kbps AAC-LC.
So definitely YouTube's one is better than MYTV digital TV ones (32kbps HE-AAC doh.gif )

This post has been edited by joshhd: Feb 6 2021, 11:05 PM
surrodox2001
post Feb 6 2021, 11:39 PM

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QUOTE
For that, I rather see they slightly reduce the bitrate for SD channels, and then in exchange, slightly increase the bitrate for HD channels.
Why? Because SD quality will still look SD quality no matter how high the bitrate you use.


And also there's the possibility to reduce the bitrate of secondary channels like CJWOWSHOP... biggrin.gif

You surely don't need HD to discern the details of the product, isn't it?

This post has been edited by surrodox2001: Feb 6 2021, 11:41 PM
joshhd
post Feb 7 2021, 12:30 AM

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QUOTE(surrodox2001 @ Feb 6 2021, 11:39 PM)
And also there's the possibility to reduce the bitrate of secondary channels like CJWOWSHOP... biggrin.gif

You surely don't need HD to discern the details of the product, isn't it?
*

We viewers wouldn't need HD for Wow Shop, but their clients/products would love to see its products to be shown in HD quality to viewers whenever possible. cool2.gif
If your products is featured on Wow Shop, would you want it to be shown in SD quality or HD quality? tongue.gif

Yes, you need to think from their perspective also nod.gif
shaun_kok
post Feb 7 2021, 12:46 AM

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QUOTE(joshhd @ Feb 6 2021, 10:20 PM)
Malaysia Digital TV Bitrate Check
6 Feb 2021

MUX 1: 666MHz (Channel 45)
user posted image     user posted image
Video bitrate:
HD = 4.1Mbps
SD = 2.1Mbps
Audio bitrate for TV & radio channels: HE-AAC v2 32kbps Stereo

MUX 2: 650MHz (Channel 43)
user posted image     user posted image
Video bitrate:
HD = 3.65Mbps (CBR 3.5Mbps, according to MediaInfo)
SD = 2.1Mbps

Audio bitrate for RTM TV channels: HE-AAC 48kbps Stereo
Audio bitrate for RTM radio channels: HE-AAC 112kbps Stereo
*
Looks like the activation of MUX 3 will become possible in the future if the available TV channels keeps adding, as both MUX 1 (Commercial TV/Radio channels) and MUX 2 (RTM/Government TV/Radio channels) will soon become full with channels. I don't understand the uneven bitrates for video and audio channels despite being operated by single operator.
Radio services won't take much space though even with 96kbps HE-AAC /128kbps LC-AAC. But the reality is 32kbps is used and quite poor HD quality.

Imagine just a few years back, even MUX 1 was half empty as TV operators doesn't have the initiative for providing more TV channels.
With new operators and channels (Awesome TV/TVS/RTM digital channels/Drama sangat), more shopping channels (Wow shop/GO shop) and HD upgrades, things are looking more different than ever with 31 TV and audio channels on free DTT. Obviously residents living in the border get more channels.

This post has been edited by shaun_kok: Feb 7 2021, 12:48 AM
joshhd
post Feb 7 2021, 12:56 AM

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QUOTE(shaun_kok @ Feb 7 2021, 12:46 AM)
Looks like the activation of MUX 3 will become possible in the future if the available TV channels keeps adding, as both MUX 1 (Commercial TV/Radio channels) and MUX 2 (RTM/Government TV/Radio channels) will soon become full with channels. I don't understand the uneven bitrates for video and audio channels despite being operated by single operator.
Radio services won't take much space though even with 96kbps HE-AAC /128kbps LC-AAC. But the reality is 32kbps is used and quite poor HD quality.

Imagine just a few years back, even MUX 1 was half empty as TV operators doesn't have the initiative for providing more TV channels.
With new operators and channels (Awesome TV/TVS/RTM digital channels/Drama sangat), more shopping channels (Wow shop/GO shop) and  HD upgrades, things are looking more different than ever with 31 TV and audio channels on free DTT. Obviously residents living in the border get more channels.
*

How about you? Are you able to receive Indonesian digital TV channels in your house at JB area, using outdoor 14-E antenna or something?
surrodox2001
post Feb 7 2021, 01:16 AM

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QUOTE
I don't understand the uneven bitrates for video and audio channels despite being operated by single operator.


My speculation is that the programme providers sent the content as-is (the video, bitrates and such), and MYTV is just beaming them out.

QUOTE
things are looking more different than ever with 31 TV and audio channels on free DTT. Obviously residents living in the border get more channels.


For me (around JB area), we can get these DTT channels (37 TV/radio ch. total)(can receive reliably)(YMMV, i cant receive Myfreeview for instance):
31 TV/audio channels from MYTV and
6 TV channels from mediacorp (all HD): Channel 5, Channel 8, Channel U, CNA, Suria, Vasantham

I expect the channel choice from mediacorp wouldn't change for now because they're heavily pushing the idea of digital services (see the increasing frequencies of ads of MeWatch, MeListen and all other Me... services).

This post has been edited by surrodox2001: Feb 7 2021, 01:10 PM
joshhd
post Feb 7 2021, 01:28 AM

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QUOTE(surrodox2001 @ Feb 7 2021, 01:16 AM)
My speculation is that the programme providers sent the content as-is (the video, bitrates and such), and MYTV is just beaming them out.
For me (around JB area), we can get these DTT channels (37 TV/radio ch. total)(can receive reliably):
31 TV/audio channels from MYTV and
6 TV channels from mediacorp (all HD): Channel 5, Channel 8, Channel U, CNA, Suria, Vasantham

I expect the channel choice from mediacorp wouldn't change for now because they're heavily pushing the idea of digital services (see the increasing frequencies of ads of MeWatch, MeListen and all other Me... services).
*

Meanwhile for Singapore digital TV, the bitrate for the 6 HD Mediacorp channels is 7.5Mbps per HD channel. Full HD picture quality indeed, no doubt on that thumbup.gif
If you ever wonder how come the picture quality for Singapore's Mediacorp digital TV channels is so much better than Malaysia's one, well now you know.

If you ask MYTV customer service, they will say it's your antenna problem or because you're not using their MYTV branded box. 🤣🤣🤣🤣

Meanwhile for their audio bitrate:
Stereo audio: 96kbps HE-AAC
5.1 surround sound audio: 256kbps HE-AAC

They don't use the heavily compressed HE-AAC v2 audio codec like MYTV sweat.gif
surrodox2001
post Feb 7 2021, 01:39 AM

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Yeah, the program quality of mediacorp tv is pretty good, albeit bit punishing to my 16G pendrive... (~1MByte/s)(gives ~4-5hrs from empty)

And also wrt surround sound audio, seems like they 'produce' (not exact word, kinda like virtual surround) surround sound audio for each shown program, using the program provided surround audio when available (that's my speculation)(ps: dolby surround works with 96k stream too).

ps: I discovered the surround part when opening the .mts files my STB produced in Audacity and saw the audio from the Ls, Rs, C and LFE tracks.

ps: the 256kbps 5.1 aac track is divided by 6 track, so 256/6 = ~42kbps, so the quality is a bit bad if you ask me.

This post has been edited by surrodox2001: Feb 7 2021, 01:47 AM
joshhd
post Feb 7 2021, 02:17 AM

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QUOTE(surrodox2001 @ Feb 7 2021, 01:39 AM)
Yeah, the program quality of mediacorp tv is pretty good, albeit bit punishing to my 16G pendrive... (~1MByte/s)(gives ~4-5hrs from empty)

And also wrt surround sound audio, seems like they 'produce' (not exact word, kinda like virtual surround) surround sound audio for each shown program, using the program provided surround audio when available (that's my speculation)(ps: dolby surround works with 96k stream too).

ps: I discovered the surround part when opening the .mts files my STB produced in Audacity and saw the audio from the Ls, Rs, C and LFE tracks.

ps: the 256kbps 5.1 aac track is divided by 6 track, so 256/6 = ~42kbps, so the quality is a bit bad if you ask me.
*

Nooo.... It is not accurate of literally "dividing" each and every 5.1 audio channels like that.
To answer this question, refer to this post:
QUOTE
This isn't the way it works.

An AC3 bit stream (and probably DTS as well) do not generally contain completely isolated channels. They are coupled and matrixed in various ways to limit the total amount of information that is transfered not to mention the .1 channel is bandwidth limited and handled differently. Additionally you haven't removed any of the format overhead from the bit rate number.

You would have to do a much, much more complex analysis to attempt to figure out a "bit rate" per channel but ultimately that doesn't matter anyway. The only important calculation is input vs output error.
QUOTE
No kidding. If this were the way it worked, you'd think you might've heard a slight bit more about it in the past 15 years.
Source: https://www.avsforum.com/threads/the-truth-...tracks.1285233/
surrodox2001
post Feb 7 2021, 02:33 AM

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Hmm, now I gets why sometimes/in early days Dolby Digital is called Dolby SR/Surround AC-3 Digital now, since it 'includes' some Dolby Surround theories into it.
dayojah
post Feb 7 2021, 01:02 PM

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How long we have to continue to waste bandwidth with parallel SD I don't know
surrodox2001
post Feb 7 2021, 01:08 PM

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Well what stations we're broadcasting in both HD and SD? Im unsure because i only can receive singapore dtt biggrin.gif

And wrt to the idea of upgrade SD to HD, this will be challenging with the pressured bandwidth limits of the current available muxes (and the fact that HD broadcast bitrates rn is pretty bad for broadcast).
Andrewtst
post Feb 7 2021, 03:11 PM

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QUOTE(joshhd @ Feb 7 2021, 12:56 AM)
How about you? Are you able to receive Indonesian digital TV channels in your house at JB area, using outdoor 14-E antenna or something?
*
Indonesia always opposite with Singapore channel.

You need to pick either antenna face towards Indonesia or Singapore.

In this case I think most will pick antenna facing over Singapore channel.

This post has been edited by Andrewtst: Feb 7 2021, 03:11 PM
trickyhunter
post Feb 7 2021, 07:18 PM

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QUOTE(shaun_kok @ Feb 6 2021, 03:21 AM)
user posted image

TVS broadcasts on 1080i (HD) and on MUX 1.

Video bitrate likely on 4Mbps while audio is on the pathetic HE-AAC V2 32Kbps.

This is the first time that significant amount of Astro in house promos can be seen on outside Astro.

Wait for @joshhd for more information
*
free to air ?
joshhd
post Feb 7 2021, 07:20 PM

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QUOTE(trickyhunter @ Feb 7 2021, 07:18 PM)
free to air ?
*
Yes. It is free to air (FTA).
surrodox2001
post Feb 7 2021, 07:32 PM

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Interestingly it says 'no title' and 'multiple languages' on it, so it hasn't got its EPG data yet and languages is in English/Malay and Iban or some variation thereof?

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