Regarding the SCMS (SP-DIF Copy Management System) and digital radio
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So, per Yamaha, when a second generation is possible, so is a third. The
tuner output includes SCMS status bits, and they work like those of any
other
source, and there's no anomalous antepenultimate setting. That completely
disagrees with Sony, according to whom it's possible sometimes to make a
second generation within SCMS but never a third.
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It should depend on whether the SCMS logic is driven by the SP-DIF Category
Codes; where there are special codes defined for digital-broadcast tuners.
When I talk of digital broadcast tuners, I talk of the satellite tuners like
Japan's BS/CS tuners, the DSS tuners available in the US, the ADR/DMX tuners
sold in Europe, or any of the Sky DigiBoxes that offer SP/DIF output in the
UK; DAB tuners offered in Europe or Canada; or the DMX or MusicChoice
cable-radio boxes offered in the US.
Sony has published information in their SCMS description as though it caters
for tuners that publish the proper SP-DIF Category Code. On the other hand,
Yamaha are catering for "unknown" factors and mentioning that a "penultimate
override" may be provided by the broadcaster; in those situations like
"pay-per-listen" events offered by broadcasters.
Also, mo-one has offered any way of monitoring SP-DIF streams to identify
information like the SP-DIF Category Code or SCMS status. This could be
useful for identifying how digital tuners handle the SCMS issue. The only
way to monitor this factor is to make a recording via the SP-DIF Recent Sony
MD decks have an officially-unsupported ability to identify the SCMS status
of an MD recording.
With regards,
Simon Mackay
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