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Hybrid Bitrate/PSNR Control for H.264 Video Streaming to Roaming Users

11 years 7 months ago
Hybrid Bitrate/PSNR Control for H.264 Video Streaming to Roaming Users
In wireless communications, the available throughput depends on several parameters, like physical layer, base station distance, fading and interference. Users experience changes in bandwidth within a cell and among same-technology cells, but also among different networks. Moreover, in case of video transmission, the user may specify a desired quality level. The source should encode the stream at a quality as close as possible to this value, without exceeding the available bitrate. We propose a technique to decide whether to encode at constant quality, if resources are enough, or at constant bitrate, if the throughput is not sufficient. With negligible complexity, it proved to obtain better PSNR/bitrate ratios, with respect to only constant bitrate and only constant PSNR coding. We also show this algorithm working in a realistic scenario of a user roaming among heterogeneous networks (WLAN and UMTS). Also in this case, the algorithm proved to achieve high quality/bitrate ratios. 1
Fabio De Vito, Federico Ridolfo, Juan Carlos De Ma
Added 25 Jun 2010
Updated 25 Jun 2010
Type Conference
Year 2005
Where ISM
Authors Fabio De Vito, Federico Ridolfo, Juan Carlos De Martin
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