EBU 3341 PDF

The switch from audio peak-normalization to loudness normalization is one of the biggest revolution in professional audio. It is important for broadcasters to be aware of the loudness paradigm. Due to the massive interest in this topic, group participation in principle is limited to broadcasters and equipment manufacturers. Other organizations e. It tells how broadcasters can measure and normalise audio using Loudness meters instead of Peak Meters PPMs only, as has been common practice.

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Loudness monitoring of programme levels is needed in radio and television broadcasting , as well as in audio post production. Traditional methods of measuring signal levels, such as the Peak programme meter and VU meter , do not give the subjectively valid measure of loudness that many would argue is needed to optimise the listening experience when changing channels or swapping disks.

The need for proper loudness monitoring is apparent in the loudness war that is now found everywhere in the audio field, and the extreme compression that is now applied to programme levels. Meters have been introduced that aim to measure the human perceived loudness by taking account of the equal-loudness contours and other factors, such as audio spectrum, duration, compression and intensity.

One such device was developed by CBS Laboratories in the s. Complaints to broadcasters about the intrusive level of interstitials programs advertisements, commercials has resulted in projects to develop such meters.

Based on loudness metering, many manufacturers have developed real-time audio processors that adjust the audio signal to match a specified target loudness level that preserves volume consistency at home listeners.

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Loudness monitoring

Loudness monitoring of programme levels is needed in radio and television broadcasting , as well as in audio post production. Traditional methods of measuring signal levels, such as the Peak programme meter and VU meter , do not give the subjectively valid measure of loudness that many would argue is needed to optimise the listening experience when changing channels or swapping disks. The need for proper loudness monitoring is apparent in the loudness war that is now found everywhere in the audio field, and the extreme compression that is now applied to programme levels. Meters have been introduced that aim to measure the human perceived loudness by taking account of the equal-loudness contours and other factors, such as audio spectrum, duration, compression and intensity. One such device was developed by CBS Laboratories in the s. Complaints to broadcasters about the intrusive level of interstitials programs advertisements, commercials has resulted in projects to develop such meters.

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'EBU Mode' metering to supplement EBU R 128 loudness normalisation

EBU R is a recommendation for loudness normalisation and maximum level of audio signals. It is primarily followed during audio mixing of television and radio programmes and adopted by broadcasters to measure and control programme loudness. Before the adoption of R , normalisation was based on the peak level of audio signals, which was leading to considerable loudness discrepancies between programmes and between broadcast channels. Starting from the early s through the early s, both the music and the advertising industries urged this practice to ensure that music and advertising spots became louder without exceeding the maximum permitted peak level. This phenomenon is known as the loudness war.

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PLoud (Loudness)

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