This morning while driving my daughter to school, we were listening to Kids Place Live on my XM radio. The audio quality was really poor and it was in mono. Switched to the Sirius app on my iPhone, directly connected into the radio and it sounded like high quality stereo. Baseball sounds the same way. Sad when the satellite radio content sounds better streaming over the internet, and we were listening via VZW's 3G network.
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Kids Place Live audio quality on XM vs. iPone app
- Thread starter Bill_W
- Start date
D
Darth_vader
Guest
Re: Kids' Place Live audio quality on XM vs. I-Phone programme
That's what happens when they try to jam 100+ streams, plus control/EPG data channels yet, into only 12 1/2 MHz of spectrum. They end up having to narrow the bitrate per satellite stream to accomadate everything, so everything ends up getting bit-starved in the process and the quality tanks. EU147 in a lot of places (*coughTheUK*cough*) has that same problem. They're trying to push too much stuff through too narrow a channel; just like using a garden hose with a fire hydrant. Why do you think the DVB simulcasts on Echostar sound so much better?
What's the bitrate on the Internet streams, if you happen to know? 128K, 160K, what?
That's what happens when they try to jam 100+ streams, plus control/EPG data channels yet, into only 12 1/2 MHz of spectrum. They end up having to narrow the bitrate per satellite stream to accomadate everything, so everything ends up getting bit-starved in the process and the quality tanks. EU147 in a lot of places (*coughTheUK*cough*) has that same problem. They're trying to push too much stuff through too narrow a channel; just like using a garden hose with a fire hydrant. Why do you think the DVB simulcasts on Echostar sound so much better?
What's the bitrate on the Internet streams, if you happen to know? 128K, 160K, what?
Which is why it would make sense to use the whole 25MHz for SXM. Put all the music only on XM with some nice bandwidth, and talk/sports/traffic on Sirius bandwidth. This duplication of all the music channels on both services gives you half the audio quality that you could have, and that is sad.
JohnnyElectron said:
Doesn't the FCC still require the 25 MHz to be split between two services, even if a monopoly owns both?
I think SXM has the license for the whole 25MHz (was to have been double that bandwidth, thanks NAB) - and it appears LIBERTY Sat and John Malone will very soon hold that radio license!
The total bandwidth for either network is about 1.8 MHz times six plus guard bands between them.
Each of two satellites in each network puts out an immediate and a time delayed signal, plus terrestrial repeaters.
By law, all of the feeds of either network must have the same content.
Various signals come and go as you drive around, but your receiver combines them and creates a solid audio output.
This is why your reception will be uninterrupted 99.999% of the time.
SiriusXM 2.0 will double that bandwidth to 3.6 MHz
Each of two satellites in each network puts out an immediate and a time delayed signal, plus terrestrial repeaters.
By law, all of the feeds of either network must have the same content.
Various signals come and go as you drive around, but your receiver combines them and creates a solid audio output.
This is why your reception will be uninterrupted 99.999% of the time.
SiriusXM 2.0 will double that bandwidth to 3.6 MHz
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