Rate control for H.264 with two-step quantization parameter determination but single-pass encoding
EURASIP Journal on Applied Signal Processing
Optimized H.264/AVC-based bit stream switching for mobile video streaming
EURASIP Journal on Applied Signal Processing
Fast Bitstream Switching Algorithms for Real-Time Adaptive Video Multicasting
IEEE Transactions on Multimedia
The SP- and SI-frames design for H.264/AVC
IEEE Transactions on Circuits and Systems for Video Technology
Rate-constrained coder control and comparison of video coding standards
IEEE Transactions on Circuits and Systems for Video Technology
Rate-distortion analysis for H.264/AVC video coding and its application to rate control
IEEE Transactions on Circuits and Systems for Video Technology
Rate-distortion analysis and streaming of SP and SI frames
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
Resilient video stream switching for mobile wireless channels
Journal of Mobile Multimedia
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To map the data rate to the available channel bandwidth, one method is to switch between video streams of different qualities using either intra (I-) frames or the switching predictive (SP-) frames of H.264. Due to its better coding efficiency SP-frames are preferred over I-frames, but these frames are generally exercised with variable bit rate (VBR) coded videos, therefore limiting their usage. For constant bit rate (CBR) coded videos, in which the quantization parameters (QP) are decided on the fly for every macro block, the design of SP-frames becomes difficult due to the multiple (twice) quantizations used in SP-frames. In this paper we propose to design SP-frames for CBR coded videos, selecting the QPs in such a way that the varying QP nature of CBR coding is preserved. The proposed algorithm is compared with the already implemented SP-frame concept for VBR video coding, showing that both the concepts have similar behavior.