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philips DSDIFF 推荐使用方法说明书 1.5 recommended usage.pdf

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    Recommended usage of DSDIFF version 1.5 Version 1 Philips Intellectual Property & Standards
    Recommended usage of DSDIFF version 1.5 Recommended usage of DSDIFF version 1.5 1 2004-04-27 Title: Version: Date: DISCLAIMER Whereas Philips has taken care to ensure that the information contained in this document is accurate, this information is provided on an "as is" basis, without any warranty as to its completeness or accuracy. Royal Philips Electronics shall not be liable in any manner whatsoever for any damages, including direct, indirect or consequential, resulting from the use of this document or reliance on the accuracy of its contents. Supply of this document does not confer any license under any intellectual property right of Royal Philips Electronics to use any of those rights in any apparatus, system or any components, subassemblies or software for such apparatus or system. For any further explanation of the contents of this document, or in case of any perceived inconsistency or ambiguity of interpretation, please consult: or send an E-mail to: Philips Intellectual Property & Standards System Standards and Technology Optical Storage and DRM / Super Audio CD Building SFF-8 P.O. Box 80002 5600 JB Eindhoven The Netherlands Fax.: +31 40 27 34965 info.superaudiocd@philips.com © Royal Philips Electronics N.V. 2002-2004 All rights reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner. Version 1 2 2004-04-27
    Recommended usage of DSDIFF version 1.5 Contents Contents 1 2 3 4 5 Introduction 1.1 PURPOSE AND SCOPE 1.2 DEFINITIONS, ACRONYMS AND ABBREVIATIONS 1.3 REFERENCES 1.4 DOCUMENT HISTORY The content creation process 2.1 RECORDING 2.2 EDITING – MIXING – SOUND MASTERING 2.2.1 Channel configurations in Edited Masters 2.2.2 The Marker offset field 2.3 DST ENCODING 2.3.1 Checking the DST encoding algorithm 2.4 AUTHORING File system limitations 3.1 3.2 THE DIVISION METHOD INTRODUCTION INTRODUCTION Time File 4.1 4.2 EXTENSION OF A T IME F ILE 4.3 REQUIRED CHUNKS IN A T IME F ILE 4.4 RESTRICTIONS ON A TIME F ILE 4.5 IDENTIFICATION OF A TIME F ILE INTRODUCTION File History 5.1 5.2 FILE REVISION INFORMATION 5.2.1 Edited Masters 5.2.2 Time Files 5.2.3 Relation between Edited Master and Time Files 5.3 EXAMPLES OF USAGE OF COMMENTS 5 5 5 6 6 7 8 8 9 10 13 13 15 16 16 16 18 18 18 19 19 19 20 20 20 20 21 21 22 Version 1 3 2004-04-27
    Recommended usage of DSDIFF version 1.5 Contents Appendix A : The CRC algorithm 24 Version 1 4 2004-04-27
    Recommended usage of DSDIFF version 1.5 Introduction 1 Introduction 1.1 PURPOSE AND SCOPE This document describes the typical usage of the DSDIFF file format, a standard file format for storing DSD material [DSDIFF]. The specification is system independent, so applications across various computer platforms can use DSDIFF files. In the specification of DSDIFF [DSDIFF] chunks are defined. Some of these chunks are optional. Within this document recommendations of how and when to use the various chunks are given. Furthermore guidelines are given of how to use DSDIFF in the Super Audio CD production chain. 1.2 DEFINITIONS, ACRONYMS AND ABBREVIATIONS CD CRC DSD DSDIFF DSD File DST DST File DST Frame EDL Fs GMT IFF PCM Silence Pattern Super Audio CD Frame Time File Compact Disc Cyclic Redundancy Check Direct Stream Digital Direct Stream Digital Interchange File Format DSDIFF file containing DSD audio Direct Stream Transfer Format for lossless encoded DSD audio DSDIFF file containing DST encoded audio 1/75 second of DST encoded audio The time corresponds to the Super Audio CD Frame time Actual length in bytes is variable Edit Decision List Sampling frequency for CD, being 44100Hz Greenwich Mean Time Interchange File Format Pulse Code Modulation A digitally generated DSD pattern with the following properties: 1/75 second of audio (is equal to CD frame length) At 64×fs a frame covers 37632 DSD samples per channel DSDIFF file containing marker information, without sound data • • all Channel Bytes have the same value each Channel Byte contains 4 bits equal to zero and 4 bits equal to one Version 1 5 2004-04-27
    Recommended usage of DSDIFF version 1.5 Introduction 1.3 REFERENCES [DSDIFF] [ScarletBook] [SONYText] The Specification of the STT File Format Sony – Super Audio CD Business Centre Direct Stream Digital Interchange File Format, Philips, Version 1.5 / April 2004 Super Audio CD Standard (Part 2) Sony/Philips 1.4 DOCUMENT HISTORY Date 2002-08-05 2002-08-09 Version Most important updates 1.4/1 1.4/2 Initial document Added: • Recommendation DST Sound Index Chunk (section 2.3) Changed: • Recommendation EMID (section 2.2) 2002-12-03 1.4/3 2003-01-23 1.4/4 2004-04-27 1.5/1 Added: Changed: • Explanation about marker offset field (section 2.2.2) • Time File Definition (chapter 4) • Authoring Recommendation (section 2.4) • File Revision information (section 5.2) Changed: • Size of a division file (section 3.1) Added: • Relation between Edited Masters and Time files • Recommendations to use plain DSD in Edited Master (section 5.2.3) (section 2.4) Changed: Removed: • Text changes in Naming Edited Masters and Time Files (section 5.2.1 and 5.2.2) • Versions numbers of reference documents (section 1.3) Version 1 6 2004-04-27
    Recommended usage of DSDIFF version 1.5 The content creation process 2 The content creation process sound Recording Editing Mixing Sound Mastering DSDIFF input Encoding Authoring DSDIFF generation Disc Manufacturing Super Audio CD Figure 1: Schematic view of the disc content creation process The content creation process consists of various stages. In this document the following process steps for creating a Super Audio CD disc [ScarletBook] are distinguished: 1) Recording 2) Editing – Mixing - Sound Mastering 3) Encoding 4) Authoring 5) Disc Manufacturing According to [DSDIFF] not all chunks are required in a DSDIFF file. In this chapter additional information can be found on how to use the optional chunks within a particular stage of the content creation process. The output of authoring and the input and output of the disc manufacturing are not described in this document, because the DSDIFF format is not used in those steps. Version 1 7 2004-04-27
    Recommended usage of DSDIFF version 1.5 The content creation process 2.1 RECORDING Analogue live A/D Converter DSD Analogue tape A/D Converter DSD DSD recorder DSD DSD Files digital (PCM) D/D Converter DSD Figure 2: Schematic overview of a recorder set up with different sound sources. There are different kind of sound sources for recording DSD signals (see Figure 2). To keep track of the used sound source the File History Sound Source Comment is defined. The following kinds of sound source types are defined within DSDIFF: • DSD, sound data directly recorded in DSD during a live recording • Analogue, sound data converted from an original recording on analogue tape • PCM, sound data converted from an original recording in the PCM domain Recommended information in a DSD file after recording: • Absolute Start time The start time of recording within the time line • Channel ID's according to the loudspeaker set-up If the recording is not made in such a way that it corresponds with a loudspeaker configuration defined in [DSDIFF] then the C001...C999 identifiers must be used; channel comments can be generated describing the channel contents (e.g. guitar, …) • Comment – General Remark Description of the recording • Comment – Operator The name or User Identification of the recording engineer • Comment - Sound Source [DSD, Analogue, PCM] • Comment - Creating machine The name and version of the recorder application 2.2 EDITING – MIXING – SOUND MASTERING The Editing, Mixing and Sound Mastering processes are closely related to each other. The different steps are not chronological, the order of these phases is an artistic decision. Furthermore the tools to perform these phases can be incorporated in one machine. Version 1 8 2004-04-27
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