BBC agrees to improve its HD bandwidth and quality??
- Thread starter bigboss
- Start date
Dave_
Well-known member
I've not seen anything official yet.
Though i suspect it's not a case of they've given in to the pressure, but more in preparation for BBC1 HD
.They've already stated on their blogs that when BBC1 HD launches they will stat-mux BBC HD/BBC1 HD.
And i know they switched from broadcasting at a constant 9.7mbps to vbr a couple of weeks back.
Though i suspect it's not a case of they've given in to the pressure, but more in preparation for BBC1 HD
.They've already stated on their blogs that when BBC1 HD launches they will stat-mux BBC HD/BBC1 HD.
And i know they switched from broadcasting at a constant 9.7mbps to vbr a couple of weeks back.
daveh75:
I've not seen anything official yet.
Though i suspect it's not a case of they've given in to the pressure, but more in preparation for BBC1 HD.As they've already stated on their blogs that when BBC1 HD launches they will stat-mux BBC HD/BBC1 HD.
As i know they switched from broadcasting at a constant 9.7mbps to vbr a couple of weeks back
dave75
Could you explain what this means to the lay man.
I thought the issue was that the BBC had gone down from something like 16mbps to 9.7 mbps.
What is stat mix (mux) and will variable bit rate down grade an already iffy broad cast?
I've not seen anything official yet.
Though i suspect it's not a case of they've given in to the pressure, but more in preparation for BBC1 HD.As they've already stated on their blogs that when BBC1 HD launches they will stat-mux BBC HD/BBC1 HD.
As i know they switched from broadcasting at a constant 9.7mbps to vbr a couple of weeks back
dave75
Could you explain what this means to the lay man.
I thought the issue was that the BBC had gone down from something like 16mbps to 9.7 mbps.
What is stat mix (mux) and will variable bit rate down grade an already iffy broad cast?
bigboss:Some sites are reporting that BBC has finally responded to the petitons and have agreed to improve the variable bit rate encoding, picture noise reduction and a number of fixes for glitches BBC HD has encountered in recent months. Can anyone confirm this?
Hi BigBoss
I haven't heard anything officially from the BBC, but it's definitely intriguing, so I'll look into it.
Hi BigBoss
I haven't heard anything officially from the BBC, but it's definitely intriguing, so I'll look into it.
Dave_
Well-known member
fayeanddavid:daveh75:
I've not seen anything official yet.
Though i suspect it's not a case of they've given in to the pressure, but more in preparation for BBC1 HD.As they've already stated on their blogs that when BBC1 HD launches they will stat-mux BBC HD/BBC1 HD.
As i know they switched from broadcasting at a constant 9.7mbps to vbr a couple of weeks back
dave75
Could you explain what this means to the lay man.
I thought the issue was that the BBC had gone down from something like 16mbps to 9.7 mbps.
What is stat mix (mux) and will variable bit rate down grade an already iffy broad cast?
In very simple terms, stat-muxing is, where rather than each channel being allocated a constant bitrate, they share a pool of bandwidth.
As an example, an average DVB-S2 satellite transponder has a total capacity of around 45mbps, and can carry a max of 5 HD channels.
Rather than each channel just getting 9mbps, if they're stat muxed, each channels bitrate can be varied depending on content.
Its a more efficient use of bandwidth, as the video content of each channel is analysed and then a greater/lesser amount of bandwidth allocated depending on the content/demand.
For example a channel broadcasting content with complex patternation,fast motion etc,will need/use more bandwidth than one showing slow panning shots of scenery etc.
I've not seen anything official yet.
Though i suspect it's not a case of they've given in to the pressure, but more in preparation for BBC1 HD.As they've already stated on their blogs that when BBC1 HD launches they will stat-mux BBC HD/BBC1 HD.
As i know they switched from broadcasting at a constant 9.7mbps to vbr a couple of weeks back
dave75
Could you explain what this means to the lay man.
I thought the issue was that the BBC had gone down from something like 16mbps to 9.7 mbps.
What is stat mix (mux) and will variable bit rate down grade an already iffy broad cast?
In very simple terms, stat-muxing is, where rather than each channel being allocated a constant bitrate, they share a pool of bandwidth.
As an example, an average DVB-S2 satellite transponder has a total capacity of around 45mbps, and can carry a max of 5 HD channels.
Rather than each channel just getting 9mbps, if they're stat muxed, each channels bitrate can be varied depending on content.
Its a more efficient use of bandwidth, as the video content of each channel is analysed and then a greater/lesser amount of bandwidth allocated depending on the content/demand.
For example a channel broadcasting content with complex patternation,fast motion etc,will need/use more bandwidth than one showing slow panning shots of scenery etc.
daveh75:fayeanddavid:daveh75:
I've not seen anything official yet.
Though i suspect it's not a case of they've given in to the pressure, but more in preparation for BBC1 HD.As they've already stated on their blogs that when BBC1 HD launches they will stat-mux BBC HD/BBC1 HD.
As i know they switched from broadcasting at a constant 9.7mbps to vbr a couple of weeks back
dave75
Could you explain what this means to the lay man.
I thought the issue was that the BBC had gone down from something like 16mbps to 9.7 mbps.
What is stat mix (mux) and will variable bit rate down grade an already iffy broad cast?
In very simple terms, stat-muxing is, where rather than each channel being allocated a constant bitrate they share a pool of bandwidth.
As an example, an average DVB-S2 satellite transponder has a total capacity of around 45mbps and can carry a max of 5 HD channels.
Rather than each channel just getting 9mbps, if they're stat muxed, each channels bitrate can be varied depending on content.
Its a more efficient use of bandwidth, as the video content of each channel is analysed and then a greater/lesser amount of bandwidth allocated depending on the content/demand.
For example a channel broadcasting content with complex patination,fast motion etc,will need/use more bandwidth than one showing slow panning shots of scenery etc.
Good explanation, fully understood, many thanks.
Also it makes sense, and is relying on some sort of diversity factor that assumes all broadcasts will not require maximum bit rates at the same time.
Point question, if they do is there some sort of compression applied to permit channels to still be broadcast, or would it be just a momentary blip of high capacity demand?
I've not seen anything official yet.
Though i suspect it's not a case of they've given in to the pressure, but more in preparation for BBC1 HD.As they've already stated on their blogs that when BBC1 HD launches they will stat-mux BBC HD/BBC1 HD.
As i know they switched from broadcasting at a constant 9.7mbps to vbr a couple of weeks back
dave75
Could you explain what this means to the lay man.
I thought the issue was that the BBC had gone down from something like 16mbps to 9.7 mbps.
What is stat mix (mux) and will variable bit rate down grade an already iffy broad cast?
In very simple terms, stat-muxing is, where rather than each channel being allocated a constant bitrate they share a pool of bandwidth.
As an example, an average DVB-S2 satellite transponder has a total capacity of around 45mbps and can carry a max of 5 HD channels.
Rather than each channel just getting 9mbps, if they're stat muxed, each channels bitrate can be varied depending on content.
Its a more efficient use of bandwidth, as the video content of each channel is analysed and then a greater/lesser amount of bandwidth allocated depending on the content/demand.
For example a channel broadcasting content with complex patination,fast motion etc,will need/use more bandwidth than one showing slow panning shots of scenery etc.
Good explanation, fully understood, many thanks.
Also it makes sense, and is relying on some sort of diversity factor that assumes all broadcasts will not require maximum bit rates at the same time.
Point question, if they do is there some sort of compression applied to permit channels to still be broadcast, or would it be just a momentary blip of high capacity demand?
Dave_
Well-known member
Yes,varied content is the key.
Sky try to vary the types of channels that are carried on any given transponder,for this reason.
Though i believe if it got to point where the BBC had to broadcast say 5 regional variations of BBC1 HD from the same transponder (where obviously,a lot of content would be the same) they could just add various delays to each channel so the demand would still be varied.
Sky try to vary the types of channels that are carried on any given transponder,for this reason.
Though i believe if it got to point where the BBC had to broadcast say 5 regional variations of BBC1 HD from the same transponder (where obviously,a lot of content would be the same) they could just add various delays to each channel so the demand would still be varied.
They havent increased the resolution to 1920x1080 though have they? - its still at 1440x1080.
Which is kinda surprising as BBC HD is available at full 1920x1080 in other countries.
Still every little bit helps I guess.
Which is kinda surprising as BBC HD is available at full 1920x1080 in other countries.
Still every little bit helps I guess.
Dave_
Well-known member
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