An adaptive GOP structure selection for haar-like MCTF encoding based on mutual information
Multimedia Tools and Applications
Adaptive video coding control for real-time H.264/AVC encoder
Journal of Visual Communication and Image Representation
Towards a stringent bit-rate conformance for frame-layer rate control in H.264/AVC
PCM'07 Proceedings of the multimedia 8th Pacific Rim conference on Advances in multimedia information processing
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Video sequences usually have many scene changes and contain rapid motion. The coding efficiency of such sequences is generally low, and the image quality fluctuates. If the rapid motion and scene changes are taken into consideration for video compression, the compression performance can be improved and the fluctuation of image quality can be reduced. An adaptive group of picture (GOP)-length structure is proposed here to consider the scene changes and rapid motion in video sequences. Our proposed algorithm for this adaptive GOP-length structure is composed of three steps. First, a correlation measure is proposed to estimate the scene changes. Second, a new intra-frame assignment method is proposed. Third, an intra-quantization parameter rule for avoiding buffer overflow and image quality fluctuation is also suggested. Our proposed algorithm has an initial delay of one-GOP length, which makes it difficult to apply for real-time communication, but this type of short initial delay is acceptable in a streaming service