Record number :
396181
Title of article :
Distortion policy of buffer-constrained rate control for real-time VBR coders
Author/Authors :
Choi، نويسنده , , J.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1999
Pages :
11
From page :
537
To page :
547
Abstract :
With rate policy, we can achieve buffer-constrained rate control for variable bit rate coder. Since rate policy emphasizes the stability of the state of the buffer, we can loose the advantage of variable bit rate coders, i.e., a (nearly) constant quality/distortion. To overcome the difficulty, the distortion policy has been considered in this paper. Based on both the state of the buffer and the distortion, we can formulate the distortion policy. By choosing a proper weighting factor of the cost function in the distortion policy, the state of the buffer can be stable and/or the variation of the distortion sequence can be kept small. In addition, properties of the distortion policy have been obtained. We also consider switching and adaptive methods for the weighting factor to adjust time-varying characteristics of blocks of images. Using a JPEG-like image coder, distortion policy has been applied to buffer-constrained rate control.
Keywords :
Buffer control , image transmission , rate-distortionfunction.
Journal title :
IEEE TRANSACTIONS ON IMAGE PROCESSING
Journal title :
IEEE TRANSACTIONS ON IMAGE PROCESSING
Serial Year :
1999
Link To Document :
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