Dolby AC-4 Online Delivery Kit Version 1.5 Copyright (C) 2011-2020 Dolby Laboratories Copyright (C) 2011-2020 Dolby International AB All rights reserved ================================================================================================= Version 1.5 GA release Release Date: September 15, 2020 ------------------------------------------------------------------------------------------------- This version includes test signals in compliance with ETSI TS 103 190-2 v1.2.1 and Dolby AC-4 decoder v2.3.2. This kit can be used by licensees who produce content and by all of the partners of the Dolby ecosystem. If you have any questions, please contact us by systemsupport@dolby.com This Dolby AC-4 kit is available for download https://ott.dolby.com. This section lists updates from the previous version. Documentation: - Update AC-4 signaling in HLS. - Update content creation system interactive test procedure help. - Update content creation test procedure. - Remove playback system interactive test procedure help. - Remove playback test procedure. Test signals - New audio and video source content. - Add an AC-4 5.1.4 channel-based immversive use case. - Add a multiple-audio-codec use case. - Add example streams for HLS and DASH: streams encoded with different audio channel, audio codecs and languages, and with different video codec and bitrate. - Add high frame rate video. - Remove DVB MPEG-2 TS streams. - Remove AC-4 elementary streams containing multiple presentations. Test Tools - Two new test tools, stream validator and stream demuxer, are included in the kit. The stream validator is an online tool to replace the MP4Validator and the HLSValidator. The stream demuxer can demultiplex Dolby codec streams from supported files. Known issues: - There is no interactive test procedure and test procedure guide for playback systems. --------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------- Revision History --------------------------------------------------------------------------------------- Version 1.4.0 GA release Release Date: February 28, 2019 ------------------------------------------------------------------------------------------------- This version includes test signals in compliance with ETSI TS 103 190-2 v1.2.1 and Dolby AC-4 decoder v2.1.1. This kit can be used by licensees who produce content creation- or playback-side systems and all the partners of the Dolby ecosystem. If you have any questions, please contact us by systemsupport@dolby.com This Dolby AC-4 kit is available for download from the Dolby Interoperability Support Center (DISC) website at https://disc.dolbycustomer.com. This section lists updates from previous version. Documentation: - Update Dolby AC-4 in HLS specs to support AC-4 IMS use case. Test signals - Update test signals to resolve the loudness issue. - Add AC-4 IMS in HLS use case. - Add HLS streams with AC-4 in fMP4 container. Test Tools - Update mp4validator to support ATSC 3.0. - Update mp4validator to support I-frames alignment between AC-4 and video content. Known issues: - Test procedures mismatch with the test signals. - The AC-4 streams with multiple presentations provided are not ABR mode. Version 1.3.2 GA release Release Date: September 28, 2018 ------------------------------------------------------------------------------------------------- This version includes test signals in compliance with ETSI TS 103 190-2 v1.2.1 and Dolby AC-4 decoder v2.1.1 This kit can be used by licensees who produce content creation- or playback-side systems and all the partners of the Dolby ecosystem. If you have any questions, please contact us by systemsupport@dolby.com This Dolby AC-4 kit is available for download from the Dolby Interoperability Support Center (DISC) website at https://disc.dolbycustomer.com. This section lists updates from previous version. Documentation: - Update Dolby AC-4 in DASH specs to be compatible with DVB DASH and ATSC 3.0 specs, and supports Dolby AC-4 IMS use case. - Update Dolby AC-4 in HLS specs to support AC-4 IMS use case. Test signals - Update all Dolby AC-4 elementary streams with using Pro Encoder 2.0. - Add Dolby AC-4 IMS streams. Test Tools - Update tools to support Dolby AC-4 IMS. Known issues: - Test procedures mismatch with the test signals. - HLS streams with AC-4 in fMP4 files are not available. - Dolby AC-4 in HLS specs is not finalized. - The AC4 IMS signaling in HLS is not finalized. - The dialnorm value in AC-4 elementary stream is not correct. Version 1.3.1 This version includes test signals in compliance with ETSI TS 103 190-2 v1.1.1 and Dolby AC-4 decoder v1.2.1. This kit can be used by licensees who produce content creation- or playback-side systems and all the partners of the Dolby ecosystem. If you have any questions, please contact us by systemsupport@dolby.com This Dolby AC-4 kit is available for download from the Dolby Interoperability Support Center (DISC) website at https://disc.dolbycustomer.com. This section lists updates from previous version. Test signals - Update all Dolby AC-4 elementary streams with 5.1-channel configuration and 128 kbps bitrate to the ASPX_ACPL_2 codec mode. - Add DVB MPEG-2 TS streams for reference. - Remove the 'ssix' box from all MPEG-DASH OnDemand streams that contain H.264 video track. - Introduce a separate variant playlist for I-frames for HTTP Live Streaming stream. Test Tools - Update hlsvalidator to support HLS verion 7 stream. Known issues: - None version 1.3 This version includes test signals in compliance with ETSI TS 103 190-2 v1.1.1 and Dolby AC-4 decoder v1.2.1. This kit can be used by licensees who produce content creation- or playback-side systems and all the partners of the Dolby ecosystem. If you have any questions, please contact us by systemsupport@dolby.com This Dolby AC-4 kit is available for download from the Dolby Interoperability Support Center (DISC) website at https://disc.dolbycustomer.com. This section lists updates from previous version. Documentation: - Introduces Dolby AC-4 for online delivery playback system interactive test help - Introduces browser-based interactive test procedure (for playback) which generates a list of required and recommended test cases for verifying your product, shows detailed test instruction for each test, records test results, and exports a report. Test signals - Introduces new test signals for multiple languages, multiple audio channel configuration and multiple audio bit-rate. - Update parts of the HLS test cases to support HLS version 7. Known issues: - hlsvalidator can't process verion 7 HLS stream. Version 1.2 This version includes test signals in compliance with ETSI TS 103 190-2 v1.1.1 and Dolby AC-4 decoder v1.2.1, upgraded test tools, and updated documents. It can be used by Content Creation, Playback licensees and all the partners of the Dolby ecosystem. If you have questions, please email systemsupport@dolby.com This Dolby AC-4 kit is available from the Dolby Interoperability Support Center (DISC) website at https://disc.dolbycustomer.com. This section lists updates from previous version. Documentation: - Provide upgraded Dolby AC-4 and MPEG-DASH spec compliance with ETSI TS 103 190-2 v1.1.1. - Provide upgraded Dolby AC-4 and HTTP Live Stream spec compliance with ETSI TS 103 190-2 v1.1.1. Test Signals - Provide upgraded test signals in compliance with ETSI TS 103 190-2 v1.1.1. Test Tools - Provide upgraded hlsvalidator, mp4validator, and mp4drop tools to support Dolby AC-4 v2 syntax. - Provide upgraded mp4demux example codes to support Dolby AC-4 v2 syntax. Known issues: The browser-based Interactive Test Procedure supports Firefox only. Version 1.1 This version includes test signals in compliance with ETSI TS 103 190 v1.2.1 and Dolby AC-4 decoder v1.0, upgraded test tools, and updated documents. It can be used by Content Creation, Playback licensees and all the partners of the Dolby ecosystem. If you have questions, please email systemsupport@dolby.com New features since Version 1.1 This version introduces a browser-based Interactive Test Procedure which generates a list of required and recommended tests for your product, shows detailed test instruction for each test, records test results, and exports a report. This Dolby AC-4 kit is available from the Dolby Interoperability Support Center (DISC) website at https://disc.dolbycustomer.com. This section lists updates from previous version. Documentation: - Introduce HTML version of the Dolby AC-4 and MPEG-DASH spec. - Introduce HTML version of the Dolby AC-4 and HTTP Live Stream spec. - Introduce browser-based Interactive Test Procedure which generates a list of required and recommended tests for your product, shows detailed test instruction for each test, records test results, and exports a report. Test Signals - Provide upgraded test signals in compliance with Dolby AC-4 specification v1.2.1. - Provide base set of HEVC Test Streams. - Provide MP4 and MPEG-2 TS as the input streams. Test Tools - Provide upgraded hlsvalidator, mp4validator, and mp4drop tools to support Dolby AC-4. - Provide upgraded mp4demux example codes to support Dolby AC-4. Known issues: The browser-based Interactive Test Procedure supports Firefox only. Version 1.0 This version adds Dolby AC-4 elementary streams encoded at additional bit rates (32 and 64 kbps for 2.0-channel streams; 64, 96, and 128 kbps for 5.1-channel streams), and multiplexed streams in MP4, MPEG-DASH, and HTTP Live Streaming formats. This version adds elementary streams and multiplexed streams in MP4, MPEG-DASH, and HTTP Live Streaming formats for new use cases: multiple languages, dual-decoding for associated audio content, and multiple bit-rates. This version updates the specification to support Dolby AC-4 in HTTP Live Streaming audio-only elementary streams, and adds elementary streams and multiplexed streams for the music-only use case. This version also updates the multiplexed streams in the HTTP Live Streaming format to incorporate changes to the MPEG2-TS ac4 descriptor from a recent DVB decision. All Dolby AC-4 elementary streams are compatible with Dolby AC-4 Decoder v0.9. This section lists updates from previous version. Documentation updates: • Created Dolby AC-4 and MPEG-DASH multiplexer test procedure, version 1.0 (25 June 2014) • Created Dolby AC-4 and MPEG-DASH demultiplexer test procedure, version 1.0 (25 June 2014) • Updated Dolby AC-4 and MPEG-DASH, version 1.0 • Created Dolby AC-4 and HTTP Live Streaming multiplexer test procedure, version 1.0 (25 June 2014) • Created Dolby AC-4 and HTTP Live Streaming demultiplexer test procedure, version 1.0 (25 June 2014) • Updated Dolby AC-4 and HTTP Live Streaming, version 1.0 Test vectors updates: • Added channel identification elementary streams and multiplexed streams encoded at additional bit rates (32 and 64 kbps for 2.0-channel streams; 64, 96, and 128 kbps for 5.1-channel streams). • Added music/audio-only elementary streams and multiplexed streams. • Added multi language elementary streams and multiplexed streams. • Added multi bitrates elementary streams and multiplexed streams. Test tools updates: Updated the hlsvalidator tool to check proper packetization and segmentation of HTTP Live Streaming audio-only elementary streams Version 0.9 This version enables the support of Dolby AC-4 in HTTP Live Streaming format, updates Dolby AC-4 streams compatible with Dolby AC-4 Decoder v0.9, and adds elementary streams and multiplexed streams for channel identification. Dolby AC-4 bitstreams are available only at high data rate. This section lists updates from previous version. Documentation updates: • Update Test Signal Information for Dolby AC-4 and MPEG-DASH Files, version 1.0 • Add Test Signal Information for Dolby AC-4 and HTTP Live Streaming Files, version 1.0 • Add Dolby AC-4 and HTTP Live Streaming, version 0.9 Test vectors updates: • Add HTTP Live Streaming elementary streams and multiplexed streams. • Update elementary streams and multiplexed streams compatible with Dolby AC-4 Decoder v0.9. • Add channel identification elementary streams and multiplexed streams. Test tools updates: • Add the hlsvalidator tool to check proper packetization and segmentation of transport streams Version 0.2 This is the first version which supports Dolby AC-4 in MPEG-DASH format. Dolby AC-4 bitstreams are available only at high data rate Documentation: • Dolby AC-4 and MPEG-DASH, version 0.9 • Test Signal Information for Dolby AC-4 and MPEG-DASH Files, version 0.9 Test tool: • mp4demux supplied with source code and Microsoft Windows 32-bit/64-bit binary form and Linux 32-bit/64-bit binary form Test Vectors: • MPEG-DASH (with Live and On Demand profiles) Streams • Unfragmented MP4 streams for reference • H.264 and H.625 video bitstreams with three frame rates and two profiles