Performance of real-time software-only H.261 codec on the Power Macintosh

Hsi-Jung Wu; Katherine S. Wang; James O. Normile; Dulce B. Ponceleon; Ken Chu; K. Sung

doi:10.1117/12.206389

17 April 1995 Performance of real-time software-only H.261 codec on the Power Macintosh

Hsi-Jung Wu, Katherine S. Wang, James O. Normile, Dulce B. Ponceleon, Ken Chu, K. Sung

Proceedings Volume 2419, Digital Video Compression: Algorithms and Technologies 1995; (1995) https://doi.org/10.1117/12.206389
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

Abstract

The widespread use of teleconferencing as a major role of remote communication has until now been stymied by the costs associated with deploying specialized hardware required to achieve good performance. Another constraint has been the incompatibility among the various systems that are available. These facts coupled with the rapid increase in computational power available on desktop systems convinced us of the value of a standards-based software solution. Leveraging the performance of the PowerPC RISC processors, we have implemented a software-only realization of the CCITT H.261 video coding standard. In this paper, we will discuss the performance of the software codec which has been optimized for the Power Macintosh 8100. Over ISDN and loaded Ethernet, the codec provides good visual quality in terms of spatial quality and frame rate over a range of bit rates (less than 64 to 384 Kbits/s). We will outline the structure of the software codec and discuss its performance.

Citation Download Citation

Hsi-Jung Wu, Katherine S. Wang, James O. Normile, Dulce B. Ponceleon, Ken Chu, and K. Sung "Performance of real-time software-only H.261 codec on the Power Macintosh", Proc. SPIE 2419, Digital Video Compression: Algorithms and Technologies 1995, (17 April 1995); https://doi.org/10.1117/12.206389

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