IEC 62760-2019 pdf free.Audio reproduction method for normalized loudness level.
Metadata of loudness or other gain control information is input to the metadata detection.They may be accompanied with audio data or separately input through other path. Thedetected metadata shall be input to each gain control unit to control its function and gainsetting.
4.3Control method4.3.1 Principal control
The reproduction level of each channel mode is controlled as specified in Clauses 5 and 6.
The downmixed reproduction level is controlled by the downmix gain control. It is controlleddepending on the downmix mode by the manufacturer’s setting.
The reproduced reference level control controls the both downmix reproduction level and non-downmix reproduction to the same reproduced reference level. The reproduced referencelevel is settled by the manufacturer.
The metadata may be accompanied with audio data, or provided through other path such asInternet or data distribution.These metadata shall be used to control reproduction levels ofthe channel mode, downmix gain control and reproduced reference level control.
4.3.2optional control
For historical and practical reasons and situations in each country, it may be required to set aspecific reproduction level of channel modes and downmixes. The optional user control maybe applied to conform to these specific settings.The optional user control may be used by theend user and the manufacturer.
The reproduction level of each channel mode is controlled as specified in Clause 6.Somechannel mode reproduction levels are not equal to the input level to the channel mode.Reproduction levels of downmixes are not equal to the input level of the downmix gain control.
Channel mode controls the reproduction level depending on the manufacturer’s mode settingsor the optional user control, and it can also be controlled with the metadata.
The downmixed reproduction level is controlled by the downmix gain control to be equal to theinput level of the downmix gain control. lt is controlled depending on the downmix mode bythe manufacturer setting or by the optional user control,and it can also be controlled with themetadata.
The metadata may be accompanied with audio data, or may be provided through another pathsuch as Internet or data distribution.
The reproduced reference level control controls the downmix reproduction level and non-downmix reproduction to be the target reproduced reference level,the target reproducedreference level is settled by the manufacturer or by the user setting the optional user control,and it can also be controlled with the metadata.
5 Channel mode
5.1General
Channel mode defines the reproduction method and level of each channel in conjunction withthe input source for each channel.Channels may range from monophonic to many channelsstereophonic, and input sources may range from monophonic to many channels stereophonic.
5.2lnput source
The combination of channels and input sources is shown in Figure 2.These show sets ofpossible input sources for each channel mode.These input sources are identified as S1 to S5.S5 is a case of more than 5.1 channels that applies the general channel assignment definedby lEC62574.IEC 62760 pdf download.