While there has always been a tremendous demand for streaming video over
TCP/IP networks, the nature of the application still presents some challenging issues.
These applications that transmit multimedia data over best-effort networks like the
Internet must cope with the changing network behavior; specifically, the source encoder
rate should be controlled based on feedback from a channel estimator that probes the
network periodically. First, one such Multimedia Streaming TCP-Friendly Protocol
(MSTFP) is considered, which iteratively integrates forward estimation of network status
with feedback control to closely track the varying network characteristics. Second, a
network-adaptive embedded bit stream is generated using a r-domain rate controller.
The conceptual elegance of this r-domain framework stems from the fact that the
coding bit rate ) (R is approximately linear in the percentage of zeros among the
quantized spatial transform coefficients ) ( r , as opposed to the more traditional, complex
and highly nonlinear ) ( Q R characterization. Though the r-model has been
successfully implemented on a few other video codecs, its application to the emerging
video coding standard H.264 is considered. The extensive experimental results show thatrobust rate control, similar or improved Peak Signal to Noise Ratio (PSNR), and a faster
implementation.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/5741 |
| Date | 17 September 2007 |
| Creators | Kota, Praveen |
| Contributors | Xiong, Zixiang |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Thesis, text |
| Format | 762202 bytes, electronic, application/pdf, born digital |
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