[tvcontrol-api] Channel scanning

tidoust has just created a new issue for 
https://github.com/w3c/tvcontrol-api:

== Channel scanning ==
I see that our Wiki page lists a number of requirements related to 
scanning channels:
https://www.w3.org/wiki/TV_Control/Use_Cases#Basic_radio_usage

I'm trying to understand when scanning channels is needed, how it 
affects the availability of the underlying `TVSource`, and why it 
needs to be exposed to Web apps. Some questions I have:

1. Am I right to assume that the tuner cannot be used during scanning?
 The spec says "due to some constraints of tuner modules, scanning and
 streaming are not encouraged to run at the same time".
2. When is scanning needed?
3. How often does scanning need to be performed? Once every few years 
for fixed TV sets? Once every 20mn for mobile radios?
4. How long does it take to scan channels on average? A few seconds? A
 few minutes?
5. Is scanning channels a power-intensive operation that should best 
be avoided on mobile devices when not needed?
6. How can a Web app determine when channels need to be scanned again?
 In particular, wouldn't the user agent be in a better position to 
know when it should launch a new scan?


Please view or discuss this issue at 
https://github.com/w3c/tvcontrol-api/issues/7 using your GitHub 
account

Received on Tuesday, 12 July 2016 06:47:57 UTC