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<p>This article addresses the relationship between MPEG video quality and ATM network performance. Application layer quality-of-service (QoS) characteristics such as the frequency, duration, and severity of allowable audio and video impairments must be determined for MPEG-2 video services. Using these user-perceived QoS characteristics, you can approximate ATM network layer requirements such as cell error ratio, cell loss ratio, and cell delay variation. </p> <p>Preliminary results show the effects of network impairments on video quality for MPEG-2 transport streams delivered over ATM using ATM adaptation layer 5 (AAL-5). The effects of AAL-5 encapsulation on video quality are reviewed, and the impact of decoding versus discarding AAL-5 packets with invalid cyclic redundancy checks is discussed. Recommendations are made on acceptable ranges for cell errors, cell loss, and cell delay variation parameters. Advanced MPEG techniques such as scalability and error concealment are discussed, including their application on ATM networks. Finally, the article reviews several important issues in the mapping of variable-rate MPEG to ATM, including the trade-off between bandwidth savings and video quality. </p>

B. Basch, S. Gringeri, K. Shuaib, B. Khasnabish, A. Lewis and R. Egorov, "Transmission of MPEG-2 Video Streams over ATM," in IEEE MultiMedia, vol. 5, no. , pp. 58-71, 1998.
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