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Deliberation of July 19th, 2011 relating to the features of the sound intensity of the programs and the advertisements of television

Publication date: Tuesday, October 11, 2011


Deliberation n° 2011-29 of July 19th, 2011 relating to the features of the sound intensity of the programs and the advertisements of television
  
 Article 177 of the law n° 2010-788 of the bearing July 12th, 2010 national engagement for the environment imposes on the TV channels the respect of an equal sound volume between the televised programs and the pages of advertising screens. Article 14 of the decree n° 92-280 of the modified March 27th, 1992 taken for the application of articles 27 and 33 of the law n° 86-1067 of September 30th, 1986 relating to the freedom of communication has that “ the noise level the advertising sequences as of the screens which precede them and which follow them should not exceed, being in particular the treatment of sound dynamics, the noise level average moreover program ”. In order to allow the editors television services to conform to these provisions, the Superior council of audio-visual, at the end of a broad dialogue, defined the technical parameters relating to the value of sound intensity during the diffusion of advertisements and televised programs. It was based in particular on the recommendations relating to the sound intensity of the European Union of radio-television (1) (EBU) and of the International union of telecommunications (2) (ITU).
 In order to accompany the efforts by the editors of television services, the council envisages implementation a progressive of the objectives hereafter definite.
 It will carry out an assessment of application of this deliberation one year after its coming into effect, then a second in 2015.
 

I. - Field of application
 The present deliberation is applicable at all the television services.
  

II. - Average Sound intensity in diffusion
 The average sound intensity, measured according to the recommendation of the ITU n° ITU-R BS-1770-2, the advertising sequences and each message which they comprise, of the programs produced before and after January 1st, 2012 and the live programs is fixed at - 23 LUFS in diffusion, according to details of implementation detailed hereafter.
  

III. - Times of implementation
 1° For the average sound intensity day labourer in diffusion:
 Starting from December 19th, 2011, the value of the average sound intensity day labourer of a television service is fixed at - 23 LUFS.
 
 2° For the advertisements:
 Starting from January 1st, 2012 and until December 31st, 2012:
 . the measured average sound intensity is lower or equal to - 22 LUFS;
 . the sound intensity measured short time is lower or equal to - 18 LUFS.
 
 Starting from January 1st, 2013:
 . the measured average sound intensity is lower or equal to - 23 LUFS;
 . the sound intensity measured short time is lower or equal to - 20 LUFS.
 In the case of a sound diffusion multichannel with the implementation of the channel of effects to low frequencies (known as “LFE” and usually restored by the enclosure called “basic box”), the sound energy transmitted on this channel should not significantly increase the sound intensity perceived by the televiewer starting from the other channels.
 As a need, the editors of the television services carry out the operations necessary on the advertisements until those reach the required values, if necessary by proportionally reducing the sound volume of these messages.
 
 3° For the programs produced before January 1st, 2012:
 Starting from January 1st, 2012:
 . except for the quiet programs, the measured average sound intensity is from - 23 LUFS with a variation around this value of - 2 LU with + 3 LU, 
 . as far as possible, the sound dynamics of the dialogues is of ± 7 LU around the value - 23 LUFS.
 
 4° For the programs produced starting from January 1st, 2012 and the programs diffused live:
 Starting from January 1st, 2012 and until December 31st, 2012:
 . except for the quiet programs, the measured average sound intensity is from - 23 LUFS with, when the duration of the program is higher than two minutes, a tolerance around this value of - 1 LU with + 3 LU, and of - 1 LU with + 2 LU if not, 
 . except for the quiet programs, the sound dynamics of the dialogues is of ± 7 LU around the value - 23 LUFS.
 Starting from January 1st, 2013:
 . except for the quiet programs, the measured average sound intensity is of - 23 LUFS, with a tolerance of ± 1 LU around this value when the duration of the program is higher than two minutes;
 . the sound dynamics of the dialogues is of ± 7 LU around the value - 23 LUFS when the duration of the program is higher than two minutes;
 . for the programs of which the duration is higher than two minutes, the value of the LRA is lower or equal to 20 LU, and as far as possible higher than 5 LU.
  

IV. - Final Provisions
 The present deliberation is applicable on the whole of the territory of the Republic.
 It will be published in the Journal officiel de la République française .
 
 Fact in Paris, on July 19th, 2011.
 For the Superior council of the audio-visual one:
 The president,
 Mr. Boyon
 
 __________________________________
 (1) EBU-R 128: “ Standardisation of the sound intensity and maximum level allowed of the signals audios ” as well as the associated technical bulletins EBU-Tech 3341, EBU-Tech 3342, EBU-Tech 3343 and EBU-Tech 3344.
 (2) ITU-R BS.1770-2 “ Algorithms to measure the audio sound intensity and level peak of a program ”.
 
  

WITH NR NR E X E 

Definitions

  • The perceived sound intensity is function of the energy transmitted by a sound and is translated by the loudspeakers into acoustic pressure. It conditions the sound perception of the televiewer, which can vary from one person to another and moment to another.
  • The sound intensity short time corresponds to the value of the sound intensity of an audio sequence measured over one three seconds duration.
  • The average sound intensity of an audio sequence is the average of the measured values of sound intensity short time of the beginning at the end of the sequence.
  • The sound dynamics of an audio sequence is the difference between the values minimal and maximum which the sound intensity short time during this sequence can take. This value is not modified at the time of an action by the televiewer on the keys “volume” of a remote control, since this operation does not change the reports of the sound intensities short time of the sequence, but modifies the values minimal and maximum.
  • An isosonic curve of weighting makes it possible to calculate the contribution of each frequency constitutive of a sound the sound impression of energy which it releases at the time of its listening under conditions given. The curve of weighting which is retained to characterize this impression within the framework of the measurement of the sound intensity in television is the curve K of the ITU.
  • LUFS indicates the measuring unit full scale of the sound intensity of an audio sequence according to an isosonic curve of weighting K. scale LUFS is graduated by step of 1 LU, equivalent to a step of 1 dB.
  • LU indicates the unit of variation of the sound intensity of an audio sequence.
  • Parameter LRA characterizes the statistical distribution of the measured sound intensities short time years an audio sequence.
  • The compression or reduction of the sound dynamics of an audio sequence is a process modifying the values of sound intensity short time while preserving the maximum value, in order to increase the average sound intensity. The sequence is then perceived as “stronger” by the televiewer whereas the “volume” fixed thanks to the remote control remained unchanged.