Audio-Video Synchronization across DTV Transport Interfaces: The Impossible Dream?

Metadata

Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: SMPTE J
Volume: 109, No. 11, pp. 881–884
Abstract: The end-to-end DTV production, distribution, and broadcast system is a complex assemblage of many digital processing and storage devices. A number of interfaces are required to transport compressed and uncompressed DTV audio and video signals between devices in the system. Each component of the DTV system imposes its own latency on the audio and/or video signals flowing through it, and the delays imposed on audio and video signals respectively, are typically unequal, compromising audio-video synchronization. It is incumbent on those implementing DTV production, post-production, and broadcast systems to be aware of the latencies present at each interface and to take steps in correcting synchronization errors at each stage, thereby preventing the buildup of lip sync errors. This paper will discuss the potential trouble spots within the DTV system.
Publication Date: 2000-11-01
DOI: 10.5594/J17554
ISSN: Print: 0036-1682
Link: https://doi.org/10.5594/J17554
Author(s): Randall HoffnerABC, Inc., New York, NY, 10023
bio
Randy Hoffner is manager of technical planning at ABC, Inc., where he is involved in the network's implementation of digital television and HDTV broadcasting. His recent activities included the transfer of film material to 720P video material for ABC's demonstrations and HDTV broadcasting. Hoffner was instrumental in NBC's implementation of television stereo broadcasting. He has participated in various industry committee activities related to advanced television and television audio, including the AES Digital Audio Standards Committee. He chaired the High Definition Electronic Production Committee, an ad-hoc group on audio for HDTV. He is currently active on the ATSC Implementation Subcommittee. Hoffner, a SMPTE Fellow, has written many technical papers on television technology, some of which have appeared in the SMPTE Journal and the Journal of the Audio Engineering Society .
Copyright: © 2000 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

Proposed SMPTE Standards [Active]
Proposed SMPTE Standard [Active]
1. AES-3–1992 (r. 1997), “AES Rec. Practice for Digital Audio Engineering—Serial Transmission Format for Two-Channel Linearly Represented Digital Audio Data,” Audio Engineering Society , New York , 1997 . EXTERNAL
10. SMPTE 302M, “Television—Mapping of AES-3 Data Into MPEG-2 Transport Stream,” SMPTE J. , 106 : 64 , Sept. 1997 . EXTERNAL
11. SMPTE 305M, “Television–Serial Data Transport Interface,” SMPTE J. , 107 : 265 , April 1998 . EXTERNAL
12. Proposed SMPTE 324M, “Television—12 Channel Serial Interface for Digital Audio and Auxiliary Data,” SMPTE J. , 108 : 600 – 603 , Aug. 1999 . EXTERNAL
2. ATSC A/52–1995, “Digital Audio Compression (AC-3) Standard,” Washington Advanced Television Systems Committee , 1995 . EXTERNAL
3. ATSC A/53–1995, “ATSC Digital Television Standard,” Washington Advanced Television Systems Committee , 1995 . EXTERNAL
4. EBU Technical Rec. R37–1997, “The Relative Timing of the Sound and Vision Components of a Television Signal,” European Broadcasting Union , Geneva , 1997 . EXTERNAL
5. IEC 60958, “Digital Audio Interface,” International Electrotechnical Commission , Geneva , 1989 . EXTERNAL
6. ITU-T Rec. J.100, “Tolerances for Transmission Time Differences Between the Vision and Sound Components of a Television Signal,” International Telecommunications Union , Geneva , June 1990 . EXTERNAL
7. SMPTE 259M, “Television—10-Bit 4:2:2 Component and 4f sc NTSC Composite Digital Signals—Serial Digital Interface,” SMPTE J. 102 : 174 – 179 , Sept. 1993 . EXTERNAL

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Randall Hoffner; Audio-Video Synchronization across DTV Transport Interfaces: The Impossible Dream?, SMPTE Journal ( Volume: 109, Issue: 11, November 2000); SMPTE, 2000. Available at https://doi.org/10.5594/J17554

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Randall Hoffner; Audio-Video Synchronization across DTV Transport Interfaces: The Impossible Dream?, SMPTE Journal ( Volume: 109, Issue: 11, November 2000); SMPTE, 2000. Available at https://doi.org/10.5594/J17554

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<span class="citation">Randall Hoffner; <cite>Audio-Video Synchronization across DTV Transport Interfaces: The Impossible Dream?</cite>, SMPTE Journal ( Volume: 109, Issue: 11, November 2000); SMPTE, 2000. Available at <a href="https://doi.org/10.5594/J17554" target="_blank" rel="noopener">https://doi.org/10.5594/J17554</a></span>

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Randall Hoffner; Audio-Video Synchronization across DTV Transport Interfaces: The Impossible Dream?, SMPTE Journal ( Volume: 109, Issue: 11, November 2000); SMPTE, 2000
doi: 10.5594/J17554
url: https://doi.org/10.5594/J17554

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<li>
Randall Hoffner; <cite id="bib-10-5594-j17554">Audio-Video Synchronization across DTV Transport Interfaces: The Impossible Dream?</cite>, SMPTE Journal ( Volume: 109, Issue: 11, November 2000); SMPTE, 2000
<span class="doi">10.5594/J17554</span>
</li>