Picture Quality Editing for Variable Rate Compressed Video

Metadata

Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: SMPTE J
Volume: 107, No. 4, pp. 236–242
Abstract: This paper discusses a novel video encoding system in which a user controls the quality of the encoded video. It uses an algorithm for reallocation of target bits to the segment selected for editing or quality change. The algorithm is based on the availability of a log file containing statistics pertaining to the original run that produced the compressed video. A key aspect of the bit allocation is that subjective input from the user is used to alter the picture quality of the edit segment. Bitstream splicing is carried out to complete the process of editing. The video is initially encoded according to an automatic process without user intervention. An operator then reviews it manually and indicates the quality of specific time periods or regions to be altered. A numeric value for picture quality is assigned in the range [-5, 5]. First, a common bit pool is created by removing a percentage of bits from the time periods or regions for which quality priorities have been specified. These are then redistributed as a function of the user-selected priority. The bit assignments are adjusted resulting in the avoidance of buffer underflow. Also, the buffer occupancy at the trailing edge of the edit segment is maintained at its original level. After the assignment of new target bits, the average quantizer scale value is determined using a previously determined rate quantizer function. The video is then re-encoded with the new set of target bits to achieve the desired quality change. Bitstream and log files are updated by proper splicing.
Publication Date: 1998-04-01
DOI: 10.5594/J06402
ISSN: Print: 0036-1682
Link: https://doi.org/10.5594/J06402
Author(s): Jay YogeshwarPresident of Front Porch Video, Inc., Lawrenceville, NJ 08640
bio
Jay Yogeshwar is the founder and president of Front Porch Video, Inc., which specializes in custom software development for digital video applications. Currently, he is active in the operation of a center of excellence for Daikin DVD authoring software, with consultation and technical support in the areas of DVD pre-mastering. Dr. Yogeshwar received his Doctorate degree from Rutgers University in 1990. He later worked as a video engineer for Prism Interactive Corp., where he particated in MPEG standardization activities. Later, in 1992, he joined Toshiba America's Advanced Television Technology Center as a research scientist. He was involved in the development of advanced television, the simulation of video encoding and decoding, and in the design and implementation of an automated encoding system for DVD video. Dr. Yogeshwar is a member of SMPTE and IEEE. He is the holder of a U.S. patent, with five patents pending.
Mikhail TsinbergToshiba America Consumer Products, Inc., Princeton, NJ 08540.
bio
Mikhail Tsinberg received an MSEE in space and aviation technology from Rybinsk Institute of Aviation Technology, USSR. Since 1991, he has been senior research manager, Toshiba America Consumer Products, Advanced Television Technology Center, responsible for DVD authoring system software and architecture and embedded software. Tsinberg is a member of NATAS and chair of a subcommittee on motion estimation technology. In 1996, Tsinberg was chairman of the SMPTE Working Group responsible for recommending studio compression-based DVCR standard procedures and was chairman of SMPTE's conference session “DVD Authoring: A New Technology.” In 1995, he co-chaired the international conference of the ATV Working Group that developed the consumer DVCR MPEG-2 recording standard based on 6mm tape recording technology for DTV and DVB applications. In 1994, in cooperation with Warner Brothers, he developed architecture and system software for the world's first digital videodisk (DVD) MPEG-2-based authoring system. Tsinberg holds 32 U.S. and foreign patents. He is a SMPTE Fellow and a member of IEEE.
Copyright: © 1998 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. ISO/IEC JTC1 CD 13818. Generic Coding of Moving Pictures and Associated Audio. International Organization for Standardization (ISO), 1994 . EXTERNAL
2. Koto O. , Toshiba R&D Center, Kawasaki, private exchange. EXTERNAL

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Jay Yogeshwar and Mikhail Tsinberg; Picture Quality Editing for Variable Rate Compressed Video, SMPTE Journal ( Volume: 107, Issue: 4, April 1998); SMPTE, 1998. Available at https://doi.org/10.5594/J06402

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Jay Yogeshwar and Mikhail Tsinberg; Picture Quality Editing for Variable Rate Compressed Video, SMPTE Journal ( Volume: 107, Issue: 4, April 1998); SMPTE, 1998. Available at https://doi.org/10.5594/J06402

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<span class="citation">Jay Yogeshwar and Mikhail Tsinberg; <cite>Picture Quality Editing for Variable Rate Compressed Video</cite>, SMPTE Journal ( Volume: 107, Issue: 4, April 1998); SMPTE, 1998. Available at <a href="https://doi.org/10.5594/J06402" target="_blank" rel="noopener">https://doi.org/10.5594/J06402</a></span>

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Jay Yogeshwar and Mikhail Tsinberg; Picture Quality Editing for Variable Rate Compressed Video, SMPTE Journal ( Volume: 107, Issue: 4, April 1998); SMPTE, 1998
doi: 10.5594/J06402
url: https://doi.org/10.5594/J06402

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Jay Yogeshwar and Mikhail Tsinberg; <cite id="bib-10-5594-j06402">Picture Quality Editing for Variable Rate Compressed Video</cite>, SMPTE Journal ( Volume: 107, Issue: 4, April 1998); SMPTE, 1998
<span class="doi">10.5594/J06402</span>
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