The Federal Communications Commission today unanimously passed rules to control the loudness of TV commercials. The order requires
all TV stations and cable systems to comply, with different parameters for
smaller operators and local versus national ads. The rules go into effect Dec. 13, 2012.
Loudness considers not the volume, but the dynamic range of sound. The rules
implement the Commercial Advertising Loudness Mitigation Act passed by Congress
a year ago. The CALM Act outlaws TV commercials that are substantially louder
than the preceding program or commercial.
For locally inserted commercials, TV stations and cable operators will have to demonstrate
they’ve installed the proper equipment and software. For national ads embedded
by a network, the network itself must certify that it is within CALM compliance.
The networks must make their certification available to all distributors.
certifications, though not mandatory, will simplify the safe harbor process for
all stations and MVPDs. While consumer complaints about loud commercials
have diminished since 2009, we expect that these new rules will reduce loudness
complaints still further,” the FCC said in its press release announcing the
vote. The Report and Order was not available at post time.
Programmers must conduct annual 24-hour audits of their content. Broadcasters
and larger cable systems must check 100 percent of programming for a period of
two years. Those cable systems with fewer than 10 million and more than 400,000
must spot check 50 percent of programming.( More details to come when the FCC
releases the order.
The FCC’s rules incorporate the Advanced Television System Committees
Recommended Practice, A/85
The RP sets target loudness at -24 LKFS (a measure of loudness, one unit equaling
a decibel), with variations up to +/-2 dB, for content without metadata. The
measurement is based on an “anchor element,” most typically the dialog of a
The ATSC first published A/85 in 2009 and revised it
in July to accommodate non-Dolby Digital (AC-3) audio codecs. The cable
industry was particularly concerned about the revision because more than 1,300
cable systems do not use Dolby Digital.
CBS, The CW and CBS Worldwide Distribution were in compliance before the CALM
Act was passed, a source at CBS confirmed. CWD programming--shows like “Dr.
Phil,” “Inside Edition,” “Jeopardy,” “Judge Judy” and others--are syndicated to
ABC, NBC, Fox, MyNetwork TV and independent stations. Fox-owned stations and
the network are also in compliance, and the other big broadcast networks are likely
to be as well, because loudness has been part and parcel of working out the
kinks of digital audio delivery.
Before the digital TV transition, video and audio were carried as one in the analog
signal. Digital transmission split the two, leading to lip-sync and other audio
issues. Broadcast engineers were working on loudness long before Congress got
The CALM Act nonetheless arose from viewer complaints about excessively loud commercials.
The FCC’s Notice of Public Rulemaking, issued May 27, noted that commercial
audio levels “have been a leading source of complaints to the Commission since
the FCC Consumer Call Center began reporting the top consumer complaints in
~ Deborah D. McAdams
TVB’s coverage of the ATSC
Audio Seminar from the 2010 HPA Retreat:
“Engineers Reach Sound Conclusions”
Tests conducted on people’s tolerance for audio
volume variation yields a perceptual diversion of around 2 dB, Dolby’s Ken
Hunold said. After that, they’ll likely futz with the volume level, so the idea
is to rein it into a perceived comfort level within the broadcast plant. More…
Twin-Cities Public TV’s Bruce Jacobs used Dolby E to illustrate the
complexity of setting dialnorm, listing 28 metadata parameters associated with
setting dialnorm. The default dialnorm value is not the correct value, he
“How Loud is Too Loud?”
Dynamic range control determines the extremes of that variation. It must be
properly channeled through the broadcast distribution chain so that home
viewers retain a degree of control over it. Some may want the full effect of
teeth-jarring explosions on their 5.1 home theater systems, said Ken Hunold of