Abstract
A low bit rate video coding requires strict buffer regulations and low buffer delay. Thus a macroblock level rate control is necessary. However, an MB-level rate control is costly at low bit rates since there is an additional overhead if the quantization parameter is changed frequently within a frame. This paper presents the rate distortion model that selects the number of significant coefficients to code in a macroblock. To do this we derive the model for rate and distortion in terms of the number of encoded coefficients with pre-computed quantization accuracy. Rate-Distortion trade-off is solved then by the Lagrange optimization and the formula is obtained that indicate how many coefficients should be coded.
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© 2001 Springer-Verlag Berlin Heidelberg
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Siemek, G. (2001). The Coefficient Based Rate Distortion Model for the Low Bit Rate Video Coding. In: Skarbek, W. (eds) Computer Analysis of Images and Patterns. CAIP 2001. Lecture Notes in Computer Science, vol 2124. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44692-3_15
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DOI: https://doi.org/10.1007/3-540-44692-3_15
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