Change log Tech 3344 v2.1

Changes between EBU Tech 3344 v2.1 and v2.0 (April 2016):

• Front page font sizes and graphic adjusted to better match EBU Techs 3341, 3342 and 3343;
• Table of Contents font changed from Arial to Trebuchet-MS;
• Figure 5 moved back to §6.4 (originally moved for pagination purposes in v2.0);
• A footnote inserted on the first page flagging the changes.

Here is a list of changes between EBU Tech 3344 v2.0 and v1.1 (October 2011):

• Reduced size (basically halved);
• Split into part 1: Distribution and part 2: Reproduction;
• Change from a device-based approach to a generic approach;
• Most of the diagrams are now moved to annexes at the end;
• Equipment diagrams have a more comparable lay-out and include blocks that indicate functionality;
• Inclusion of compliance checklists;
• Inclusion of AC-4 and MPEG-H;
• Explanation of how to handle DRC for various codecs, including 'presentation mode' for MPEG-4 AAC & HE-AAC;
• Active normalisation in the distribution stage is now optional and meant to correct severe deviations only;
• Details on how to handle mono audio presented on stereo and multi-channel outputs;
• Distinction between the level on stereo and multi-channel analogue interfaces on home theatre equipment;
• Automatic loudness matching in combined FM radio and DAB/DAB+ receivers;
• Use of HDMI E-EDID is now optional, which increases acceptability for some manufacturers;
• Support for -27 LUFS referenced devices is now optional;
• Extensive down-mix advice to avoid arbitrary reproduction and to reduce loudness variances between consumer devices;
• Advice on loudness normalisation in mobile devices such as Personal Music Players;
• Updated FM alignment, better corresponding with FM networks based on 0 dBr MPX power;

Version history