The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
L'évolutivité du débit binaire et du format de codage dans les contenus multimédias codés est devenue très importante pour l'utilisation efficace de la bande passante du réseau et de la capacité de stockage avec la disponibilité récente d'une grande variété de bandes passantes et de supports de stockage. Cependant, l’approche conventionnelle utilise des processus de décompression et de recompression pour réaliser les évolutivités ci-dessus, qui nécessitent des calculs très coûteux. De plus, un très grand espace cache est requis pour stocker les données audio-vidéo décodées. Cet article décrit trois méthodes d'évolutivité rapide pour les données audio et vidéo MPEG, la conversion du débit binaire audio/vidéo MPEG et la conversion du format MPEG, afin de résoudre ces problèmes. En ce qui concerne la première évolutivité, les conversions de débit binaire de codage audio MPEG, nous décrivons la conversion de domaine de sous-bande en utilisant la limitation de bande passante, la requantification et une requantification reflétant un modèle phychoacoustique. Quatre types de conversion de débit binaire vidéo MPEG sont décrits qui utilisent la limitation de bande passante, la requantification en boucle extérieure, la requantification en boucle et la requantification hybride. Quant à la conversion de format, la conversion rapide de format de domaine de bande de base est effectuée à l'aide d'informations de codage telles que des vecteurs de mouvement et des types de codage extraits de la vidéo codée d'entrée. Les résultats expérimentaux de plusieurs comparaisons avec les évolutivités ci-dessus et les méthodes de transcodage conventionnelles sont également présentés.
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Yasuyuki NAKAJIMA, Masaru SUGANO, "MPEG Bit Rate and Format Conversions for Heterogeneous Network/Storage Applications" in IEICE TRANSACTIONS on Electronics,
vol. E85-C, no. 3, pp. 492-504, March 2002, doi: .
Abstract: Scalabilities of bit rate and coding format in coded multimedia contents have become very important for the efficient use of network bandwidth and storage capacity with the recent availability of a wide variety of bandwidth and storage media. However, the conventional approach uses decompression and recompression processes to realize the above scalabilities, which require very expensive computations. In addition, a very large cache space is required for storing the decoded audio-video data. This paper describes three fast scalability methods for MPEG audio and video data, MPEG audio/video bit rate conversion and MPEG format conversion, in order to address these problems. As for the first scalability, MPEG audio coding bit rate conversions, we describe subband domain conversion using bandwidth limitation, requantization and a requantization reflecting phychoacoustic model. Four types of MPEG video bit rate conversion are described that use bandwidth limitation, out-loop requantization, in-loop requantization, and hybrid requantization. As for the format conversion, the fast baseband domain format conversion is performed using coding information such as motion vectors and coding types extracted from input coded video. The experimental results of several comparisons with the above scalabilities and conventional transcoding methods are also shown.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e85-c_3_492/_p
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@ARTICLE{e85-c_3_492,
author={Yasuyuki NAKAJIMA, Masaru SUGANO, },
journal={IEICE TRANSACTIONS on Electronics},
title={MPEG Bit Rate and Format Conversions for Heterogeneous Network/Storage Applications},
year={2002},
volume={E85-C},
number={3},
pages={492-504},
abstract={Scalabilities of bit rate and coding format in coded multimedia contents have become very important for the efficient use of network bandwidth and storage capacity with the recent availability of a wide variety of bandwidth and storage media. However, the conventional approach uses decompression and recompression processes to realize the above scalabilities, which require very expensive computations. In addition, a very large cache space is required for storing the decoded audio-video data. This paper describes three fast scalability methods for MPEG audio and video data, MPEG audio/video bit rate conversion and MPEG format conversion, in order to address these problems. As for the first scalability, MPEG audio coding bit rate conversions, we describe subband domain conversion using bandwidth limitation, requantization and a requantization reflecting phychoacoustic model. Four types of MPEG video bit rate conversion are described that use bandwidth limitation, out-loop requantization, in-loop requantization, and hybrid requantization. As for the format conversion, the fast baseband domain format conversion is performed using coding information such as motion vectors and coding types extracted from input coded video. The experimental results of several comparisons with the above scalabilities and conventional transcoding methods are also shown.},
keywords={},
doi={},
ISSN={},
month={March},}
Copier
TY - JOUR
TI - MPEG Bit Rate and Format Conversions for Heterogeneous Network/Storage Applications
T2 - IEICE TRANSACTIONS on Electronics
SP - 492
EP - 504
AU - Yasuyuki NAKAJIMA
AU - Masaru SUGANO
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E85-C
IS - 3
JA - IEICE TRANSACTIONS on Electronics
Y1 - March 2002
AB - Scalabilities of bit rate and coding format in coded multimedia contents have become very important for the efficient use of network bandwidth and storage capacity with the recent availability of a wide variety of bandwidth and storage media. However, the conventional approach uses decompression and recompression processes to realize the above scalabilities, which require very expensive computations. In addition, a very large cache space is required for storing the decoded audio-video data. This paper describes three fast scalability methods for MPEG audio and video data, MPEG audio/video bit rate conversion and MPEG format conversion, in order to address these problems. As for the first scalability, MPEG audio coding bit rate conversions, we describe subband domain conversion using bandwidth limitation, requantization and a requantization reflecting phychoacoustic model. Four types of MPEG video bit rate conversion are described that use bandwidth limitation, out-loop requantization, in-loop requantization, and hybrid requantization. As for the format conversion, the fast baseband domain format conversion is performed using coding information such as motion vectors and coding types extracted from input coded video. The experimental results of several comparisons with the above scalabilities and conventional transcoding methods are also shown.
ER -