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".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Pengekodan video MPEG ialah standard pengekodan video yang paling banyak digunakan yang biasanya menjana aliran data kadar bit berubah (VBR). Walaupun ATM boleh menghantar trafik VBR, trafik pecah masih mempunyai kemungkinan untuk digugurkan kerana kesesakan rangkaian. Kehilangan sel boleh diminimumkan dengan menggunakan kaedah kawalan kadar yang dikuatkuasakan. Walau bagaimanapun, kualiti video yang diterbitkan semula mungkin dikorbankan kerana kadar puncak yang tidak mencukupi. Dalam kerja ini, kami mencadangkan mekanisme penyesuaian kualiti hujung ke hujung untuk trafik MPEG melalui ATM. Skim kawalan kualiti penyesuaian (AQC) memperuntukkan bilangan bit pengekodan tertentu kepada setiap bingkai video berdasarkan keadaan rangkaian dan jenis bingkai seterusnya. Lebih banyak bit boleh diperuntukkan jika keadaan rangkaian, yang diwakili oleh tahap sambungan, adalah baik atau bingkai seterusnya ialah bingkai B yang biasanya menggunakan lebih sedikit bit. Tahap sambungan yang tinggi membolehkan bilangan sel yang ditag yang agak besar, yang tidak dijamin dalam penghantaran, untuk bingkai video dengan kadar puncak yang tinggi. Unit pelarasan tahap sambungan di hujung pengekod melaraskan tahap sambungan berdasarkan mesej keadaan rangkaian daripada unit pemantauan kualiti pada penyahkod. Hasil simulasi menunjukkan bahawa sistem AQC boleh menggunakan lebar jalur saluran dengan berkesan serta mengekalkan kualiti video yang memuaskan dalam pelbagai keadaan rangkaian.
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Salinan
Pao-Chi CHANG, Jong-Tzy WANG, Yu-Cheng LIN, "Adaptive Video Quality Control Based on Connection Status over ATM Networks" in IEICE TRANSACTIONS on Communications,
vol. E82-B, no. 9, pp. 1388-1396, September 1999, doi: .
Abstract: The MPEG video coding is the most widely used video coding standard which usually generates variable bitrate (VBR) data streams. Although ATM can deliver VBR traffic, the burst traffic still has the possibility to be dropped due to network congestion. The cell loss can be minimized by using an enforced rate control method. However, the quality of the reproduced video may be sacrificed due to insufficient peak rate available. In this work, we propose an end-to-end quality adaptation mechanism for MPEG traffic over ATM. The adaptive quality control (AQC) scheme allocates a certain number of coding bits to each video frame based on the network condition and the type of next frame. More bits may be allocated if the network condition, represented by the connection-level, is good or the next frame is B-frame that usually consumes fewer bits. A high connection-level allows a relatively large number of tagged cells, which are non-guaranteed in delivery, for video frames with high peak rates. The connection-level adjustment unit at the encoder end adjusts the connection-level based on the message of the network condition from the quality monitoring unit at decoder. The simulation results show that the AQC system can effectively utilize the channel bandwidth as well as maintain satisfactory video quality in various network conditions.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e82-b_9_1388/_p
Salinan
@ARTICLE{e82-b_9_1388,
author={Pao-Chi CHANG, Jong-Tzy WANG, Yu-Cheng LIN, },
journal={IEICE TRANSACTIONS on Communications},
title={Adaptive Video Quality Control Based on Connection Status over ATM Networks},
year={1999},
volume={E82-B},
number={9},
pages={1388-1396},
abstract={The MPEG video coding is the most widely used video coding standard which usually generates variable bitrate (VBR) data streams. Although ATM can deliver VBR traffic, the burst traffic still has the possibility to be dropped due to network congestion. The cell loss can be minimized by using an enforced rate control method. However, the quality of the reproduced video may be sacrificed due to insufficient peak rate available. In this work, we propose an end-to-end quality adaptation mechanism for MPEG traffic over ATM. The adaptive quality control (AQC) scheme allocates a certain number of coding bits to each video frame based on the network condition and the type of next frame. More bits may be allocated if the network condition, represented by the connection-level, is good or the next frame is B-frame that usually consumes fewer bits. A high connection-level allows a relatively large number of tagged cells, which are non-guaranteed in delivery, for video frames with high peak rates. The connection-level adjustment unit at the encoder end adjusts the connection-level based on the message of the network condition from the quality monitoring unit at decoder. The simulation results show that the AQC system can effectively utilize the channel bandwidth as well as maintain satisfactory video quality in various network conditions.},
keywords={},
doi={},
ISSN={},
month={September},}
Salinan
TY - JOUR
TI - Adaptive Video Quality Control Based on Connection Status over ATM Networks
T2 - IEICE TRANSACTIONS on Communications
SP - 1388
EP - 1396
AU - Pao-Chi CHANG
AU - Jong-Tzy WANG
AU - Yu-Cheng LIN
PY - 1999
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E82-B
IS - 9
JA - IEICE TRANSACTIONS on Communications
Y1 - September 1999
AB - The MPEG video coding is the most widely used video coding standard which usually generates variable bitrate (VBR) data streams. Although ATM can deliver VBR traffic, the burst traffic still has the possibility to be dropped due to network congestion. The cell loss can be minimized by using an enforced rate control method. However, the quality of the reproduced video may be sacrificed due to insufficient peak rate available. In this work, we propose an end-to-end quality adaptation mechanism for MPEG traffic over ATM. The adaptive quality control (AQC) scheme allocates a certain number of coding bits to each video frame based on the network condition and the type of next frame. More bits may be allocated if the network condition, represented by the connection-level, is good or the next frame is B-frame that usually consumes fewer bits. A high connection-level allows a relatively large number of tagged cells, which are non-guaranteed in delivery, for video frames with high peak rates. The connection-level adjustment unit at the encoder end adjusts the connection-level based on the message of the network condition from the quality monitoring unit at decoder. The simulation results show that the AQC system can effectively utilize the channel bandwidth as well as maintain satisfactory video quality in various network conditions.
ER -