Talk:In-band on-channel

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Challenges correction?

I believe this is incorrect: "this is officially said to stand for "hybrid digital" rather than "high definition"."

iBiquity's marketers and staff at recent NAB shows say the HD does not stand for anything.

Crutchfield: http://www.crutchfieldadvisor.com/ISEO-rgbtcspd/learningcenter/car/hdradio_faq.html#4

At the 2006 Texas Association of Broadcasters meeting, representatives of the HD Radio Alliance repeated that the HD in HD Radio does not stand for anything.

FM multiplex

I believe this to be inaccurate: "This is especially so if the FM station chooses to continue using part of its bandwidth for analog stereo, decreasing the amount available to (and therefore the audio quality of) the digital signal."

In the FM multiplex system, the L-R stereo information is a subcarrier at 38 kHz in the composite signal. Stations not using this subcarrier are still permitted to modulate at 100% deviation (+- 75 kHz). While it would be possible to reduce the carrier deviation, doing so would result in a lower signal-to-noise ratio in the receiver.

The extended hybrid modes (MP2, MP3, MP4) in IBOC allows for an additional data channel, but they should not significantly affect stereo and SCA operation [1].

-- This comment added by 69.1.3.234 on 21 Jan 2005

FCC?

"However, by putting extra RF energy just outside the edge of the station's FCC defined channel,"

Is that the Federal Comms Commn? If so, its Americocentric, its okay as a example in this technical point, but it should at least have an FCC wikipedia [] link. --81.105.251.160 00:58, 6 August 2006 (UTC)[reply]

NPOV

There is a bias favoring HD radio in the CAM-D section. The article itself here suffers from the same bias but I have attempted to fix the POV on that article. This one needs to be neutral too. The CAM-D section seems to be more of criticism than of how it actually works, where as HD radio has seemingly been glorified, which is anything but the truth. Milonica (talk) 22:21, 2 March 2008 (UTC)[reply]