InterBEE REVIEW2011 (EN)

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34 “Generally speaking, the louder the volume in video con-tents, the more noticeable it is. From around 1998, the different levels of volume for TV commercials and TV programs have been a problem in many countries. In the case of analog broad-casting signals, there were limits to how much you could increase the volume because the audio signal margin was small. However, in digital broadcasting this margin increases to around 10dB, and the imbalance in volume in TV broadcasting starts to become a more prominent issue.” “Based on the technological evidence collected from many countries, including Japan and the US, a movement began to create rules to restrict the imbalance in volume. Finally, it was decided to create rules for voice and sound volume, which were to be measured by the unit of “loudness,” and also to set an upper limit target loudness value of 24LKFS (Loudness Unit Full-Scale). ARIB TR-B32, which includes loudness manage-ment regulations, was enacted in the spring of 2011 as the rule for restricting the volume of video content. There was talk that penalties would be imposed if this rule was not adhered to, so as a result there was a lot of interest in the broadcasting and video industries.” “At a study meeting in Osaka in the spring of 2011, 250 people attended, which was much more than expected. Also, at a study meeting in July in Fukuoka, 200 people attended. These attendance figures indicate the high level of interest in the regulations.”The discrepancy in volume is considered a problem throughout the worldPromoting a more pleasant listening experience “It was anticipated that the NAB would decide the loudness regulation management by the fall of this year, so publicizing it at Inter BEE was perfect timing. We prepared the Loudness Summit Tokyo to be part of Inter BEE. Immediately before the start of Inter BEE, the NAB decided that ‘the actual manage-ment of loudness management regulations would begin from October 1, 2012.’ In other words, after October 1 of this year, content that did not meet the loudness standard could not be delivered to the broadcaster. A number of companies have launched loudness meters that measure this loudness standard. Complying with this rule will provide a more pleasant listening experience for the listener.” “In the future, we hope that this rule will be adopted also for transmission by networks other than TV broadcasting and for other contents, just like similar regulation efforts made in Europe and the US.”■The announcement of international regulations at Inter BEE

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