Norway switches off FM radio, but a station is defying government order

Re:Norway switches off FM radio, but a station is defying go... by ajross on Friday December 15, 2017 @01:38PM (#15933966)

> the lag associated with changing channels

This isn't even an audio thing. With a classic television, you can crank the channel dial and (along with the instant audio output) see a stable frame within 5-20 frames of vsync (so like 300ms or so worst case).

My TV at home can't switch an input (e.g. between two HDMI inputs) faster than about 3-4 seconds. No, I don't know why either. It's actually much worse if the device being switched away from is a Chromecast. Don't know why there either.

[ Parent | on HN ]

Re:Norway switches off FM radio, but a station is defying go... by pfranz on Friday December 15, 2017 @02:19PM (#15934277)

I've heard newer HDMI standards have HDMI Fast Switching. Skimming over the first URL google gave me[1] it sounds like the slowness is because of HDCP (HD Content Protection). Although, it sounds like it will theoretically take it from ~10seconds to maximum of 2 (average of 1) for proper implementations.

https://www.synopsys.com/designware-ip/technical-bulletin/hd...

[ Parent | on HN ]

Re:Norway switches off FM radio, but a station is defying go... by ajross on Friday December 15, 2017 @02:26PM (#15934307)

Looks like "HDMI fast switching" just means "open all the input connections all the time", which is sort of a hack. But yeah, that seems plausible.

Of course, in the time it takes for my television to initiate a secure transaction channel with the input hardware on the other side of the cable, my ?!%!? Netflix app has done a arguably more secure transaction with a server on the other side of the continent. Sigh.

[ Parent | on HN ]

Re:Norway switches off FM radio, but a station is defying go... by pfranz on Friday December 15, 2017 @03:19PM (#15934724)

You're in good company

> I can send an IP packet to Europe faster than I can send a pixel to the screen. How f’d up is that?

John Carmack

https://twitter.com/id_aa_carmack/status/193480622533120001?...

[ Parent | on HN ]

Re:Norway switches off FM radio, but a station is defying go... by IronBacon on Friday December 15, 2017 @01:48PM (#15934049)

I've read a comment here that the HDMI lag on source switch is caused by DRM. I haven't investigated the claim but I consider it plausible... ^__^;

[ Parent | on HN ]

Re:Norway switches off FM radio, but a station is defying go... by scott_karana on Saturday December 16, 2017 @12:43AM (#15937963)

I've noticed that my TV takes a while to change resolution+refresh rate, which typically happens in concert with switching inputs to/from my Chromecast.

Hardcoded "everything is NTSC" vs a mutual handshake/negotiation and mode change makes sense, though I too wish it was much faster.

[ Parent | on HN ]