IEC 62760-2016 pdf download.Audio reproduction method for normalized loudness level.
In this model, the channel mode applies the appropriate reproduction-level control described in Clause 5. The downmix gain control is a compensation of reproduction level of downmix. The reproduced reference level control is a final level control, it controls reproduction level to the target reproduced reference 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. The detected metadata shall be input to each gain control unit to control its function and gain setting.
4.3 Control method
4.3.1 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 controlled depending 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 reference level is settled by the manufacturer. The metadata may be accompanied with audio data, or provided through other path such as Internet or data distribution. These metadata shall be used to control reproduction levels of the channel mode, downmix gain control and reproduced reference level control.
4.3.2 Optional control For historical and practical reasons and situations in each country, it may be required to set a specific reproduction level of channel modes and downmixes. The optional user control may be applied to conform to these specific settings. The optional user control may be used by the end user and the manufacturer. The reproduction level of each channel mode is controlled as specified in Clause 6. Some channel 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 settings or 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 the input level of the downmix gain control. It is controlled depending on the downmix mode by the manufacturer setting or by the optional user control, and it can also be controlled with the metadata. The metadata may be accompanied with audio data, or may be provided through another path such 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 reproduced reference 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
5.1 General Channel mode defines the reproduction method and level of each channel in conjunction with the input source for each channel. Channels may range from monophonic to many channels stereophonic, and input sources may range from monophonic to many channels stereophonic.
5.2 Input source The combination of channels and input sources is shown in Figure 2. These show sets of possible 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 defined by IEC 62574.IEC 62760 pdf download.