Rate-adaptive H.264 for TCP/IP networks

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Title: Rate-adaptive H.264 for TCP/IP networks
Author: Kota, Praveen
Abstract: 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 .
URI: http : / /hdl .handle .net /1969 .1 /5741
Date: 2007-09-17

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Rate-adaptive H.264 for TCP/IP networks. Available electronically from http : / /hdl .handle .net /1969 .1 /5741 .

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