Distribution and Emission of Multichannel Audio Programs, and Implications for Post-Production

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: SMPTE J
Volume: 107, No. 10, pp. 879–883
Abstract: Many new digital television emission formats, including digital video disk (DVD), community antenna TV (CATV), direct broadcasting by satellite (DBS), and terrestrial television, incorporate the Dolby Digital (AC-3) low bit-rate audio coding system. This system is capable of delivering discrete multichannel audio to the consumer, and also offers several unique features such as dialogue normalization and dynamic range control. The Dolby Digital is intended for use in emission, which is defined as the final link in the delivery path to the consumer. Many of the features of Dolby Digital are best controlled in the post-production process. A distribution path is required between the output of post-production and the input to the final AC-3 emission encoder. Although the handling of multichannel audio is routine in the post-production area, the infrastructure needed to distribute multichannel audio in the broadcast environment is currently lacking. This paper will describe some of the unique features of Dolby Digital that should be understood and managed by those in post-production. The paper also illuminates some of the problem areas in distribution of the completed multichannel audio program to the actual point of emission to the final consumer.
Publication Date: 1998-10-01
DOI: 10.5594/J04394
ISSN: Print: 0036-1682
Link: https://doi.org/10.5594/J04394
Author(s): Craig ToddDolby Laboratories, San Francisco, CA 94103.
bio
Craig Todd has been with Dolby Laboratories since 1977, and is currently the senior member of the technical staff. He's been involved with multichannel sound for 20 years, beginning with his work which established the Dolby Surround Sound matrix system in the cinema, and later in the home. More recently, Todd assisted in the development of technology for digital audio on an over-the-air broadcast at the NAB convention and has concentrated on multichannel digital audio for television. His efforts resulted in the Dolby Digital coding technology which has been accepted for incorporation into the U.S. HDTV broadcast standard. Todd, vice-chairman of WP10C, is an active participant in the ITU-R where he was involved in the drafting of several audio recommendations. He is a member of SMPTE and IEEE. Todd is also a member and fellow of AES and holds a number of patents in the areas of matrix surround and digital audio coding technology.
Copyright: © 1998 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Advanced Television Systems Committee , “Digital Audio Compression (AC-3) Standard.” 20 Dec. 1995 , http://www.atse.org . EXTERNAL
2. Advanced Television Systems Committee , “Guide to the Use of the ATSC Digital Television Standard,” 4 Oct. 1995, http://www.atse.org . EXTERNAL

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Craig Todd; Distribution and Emission of Multichannel Audio Programs, and Implications for Post-Production, SMPTE Journal ( Volume: 107, Issue: 10, October 1998); SMPTE, 1998. Available at https://doi.org/10.5594/J04394

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Craig Todd; Distribution and Emission of Multichannel Audio Programs, and Implications for Post-Production, SMPTE Journal ( Volume: 107, Issue: 10, October 1998); SMPTE, 1998. Available at https://doi.org/10.5594/J04394

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<span class="citation">Craig Todd; <cite>Distribution and Emission of Multichannel Audio Programs, and Implications for Post-Production</cite>, SMPTE Journal ( Volume: 107, Issue: 10, October 1998); SMPTE, 1998. Available at <a href="https://doi.org/10.5594/J04394" target="_blank" rel="noopener">https://doi.org/10.5594/J04394</a></span>

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Craig Todd; <cite id="bib-10-5594-j04394">Distribution and Emission of Multichannel Audio Programs, and Implications for Post-Production</cite>, SMPTE Journal ( Volume: 107, Issue: 10, October 1998); SMPTE, 1998
<span class="doi">10.5594/J04394</span>
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