Accurate Bitrate Model and Greedy-Based Rate Controller for Low Delay Video Transmission

作者：Chang Chun Yuan^*; Chou Cheng Fu; Chan Din Yuen; Lin Tsungnan; Chen Ming Hung

来源：IEEE Systems Journal, 2012, 6(3): 414-425.

DOI：10.1109/JSYST.2011.2163986

• Rate control
• rate-quantization model

We develop a q-domain characteristic-based rate model for video transmission. Specifically, we extract three characteristics from the quantized discrete cosine transform spectra to construct an accurate rate-quantization (R-Q) model. Moreover, the extraction of the proposed characteristics requires only simple additive operations (additions, subtractions, and comparisons) and few multiplications. Based on the q-domain characteristic-based bitrate model, we develop an efficient two-level greedy-based rate controller for low delay video transmission. Extensive experimental results show that due to the efficiency and accurate estimation of both macroblock and frame-level R-Q models, the proposed rate controller better maintains the source bitrate to meet a predefined buffer delay time, and substantially enhances visual quality as compared with other rate controllers.

• 出版日期2012-9