Rate control for H.264 with two-step quantization parameter determination but single-pass encoding
EURASIP Journal on Applied Signal Processing
Dynamic complexity scaling for real-time H.264/AVC video encoding
Proceedings of the 15th international conference on Multimedia
Frame-level bit allocation based on incremental PID algorithm and frame complexity estimation
Journal of Visual Communication and Image Representation
A two-pass rate control algorithm for H.264/AVC high definition video coding
Image Communication
A cross-layer framework for efficient streaming of H.264 video over IEEE 802.11 networks
Journal of Computer Systems, Networks, and Communications
Adaptive video coding control for real-time H.264/AVC encoder
Journal of Visual Communication and Image Representation
Efficient one-pass frame level rate control for H.264/AVC
Journal of Visual Communication and Image Representation
IEEE Transactions on Circuits and Systems for Video Technology
A cauchy-density-based rate controller for H.264/AVC in low-delay environments
PCS'09 Proceedings of the 27th conference on Picture Coding Symposium
A two-level rate control approach for video transcoding
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
Delay constrained multiplexing of video streams using dual-frame video coding
IEEE Transactions on Image Processing
A low complexity macroblock layer rate control scheme base on weighted-window for h.264 encoder
MMM'12 Proceedings of the 18th international conference on Advances in Multimedia Modeling
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This paper presents an efficient rate control scheme for the H.264/AVC video coding in low-delay environments. In our scheme, we propose an enhancement to the buffer-status based H.264/AVC bit allocation method. The enhancement is by using a PSNR-based frame complexity estimation to improve the existing mean absolute difference based (MAD-based) complexity measure. Bit allocation to each frame is not just computed by encoder buffer status but also adjusted by a combined frame complexity measure. To prevent the buffer from undesirable overflow or underflow under small buffer size constraint in low delay environment,the computed quantization parameter (QP) for the current MB is adjusted based on actual encoding results at that point. We also propose to compare the bits produced by each mode with the average target bits per MB to dynamically modify Lagrange multiplier (λMODE) for mode decision. The objective of QP and λMODE adjustment is to produce bits as close to the frame target as possible, which is especially important for low delay applications. Simulation results show that the H.264 coder, using our proposed scheme, obtains significant improvement for the mismatch ratio of target bits and actual bits in all testing cases, achieves a visual quality improvement of about 0.6 dB on the average, performs better for buffer overflow and underflow,and achieves a similar or smaller PSNR deviation.