21712 - SCTE Broadband Nov2022 COMPLETE v1

51 Vol. 44 No. 4 - November 2022 Issue technical Increased Bit-Depth (10-bit) Allows presentation of more than 1 billion colours compared to 8-bit which supports approximately 16 million colours. A proper picture would result in the display presenting an image with the HDR, WCG and bit-depth capabilities enabled. However, just because an image can be seen on the screen, it doesn’t mean that picture is correct. What is Proper Audio? At the core of every home entertainment system there is at a minimum the TV speakers. Beyond this there are many different audio options. One option is that of a sound bar, which can either be stand- alone, or the sound bar can include subwoofers and satellite speakers. Beyond sound bars there are A/V receivers. The A/V receivers can be configured for multi-channel audio, including speaker configurations of 2.1, 3.1, 5.1, 7.1, as well as the newer immersive audio configurations which can be configured for 5.1.2, 5.1.4, 7.1.2 or 7.1.4. The audio implemented in content is typically configured for some level of multi-channel support. Proper audio playback would consist of the audio being output to the maximum number of channels it supports up to the maximum capabilities of the home entertainment system. So if the audio in the content is configured for 5.1 and a home theatre system can support 7.1.4, the audio should be output for 5.1. If the home theatre only supports 3.1 then the audio output should be 3.1. However, just because sound can be heard, it doesn’t mean that the audio is output correctly. UHD Alliance interoperability studies The UHD Alliance created an Interoperability Working Group (IWG) within the organisation to investigate interoperability issues. During the investigations, many issues were identified – bothwith video and audio playback. As part of the interoperability BT.2020 / BT.709 The Meg © 2018 Warner Bros. Entertainment Inc. “The Meg now available on 4K Ultra HD Blu-ray” 8-bit / 10-bit The Lego Batman Movie © 2017 Warner Bros. Entertainment Inc. TM & © DC Comics © 2017 The LEGO Group “The Lego Batman Movie now available on 4K Ultra HD Blu-ray” TV with built-in speakers TV with soundbar TV in Multi-channel environment courtesy of Dolby Laboratories