Low-delay rate control for real-time H.264/AVC video coding
IEEE Transactions on Multimedia
A new rate control scheme using quadratic rate distortion model
IEEE Transactions on Circuits and Systems for Video Technology
A unified architecture for real-time video-coding systems
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
On Lagrange multiplier and quantizer adjustment for H.264 frame-layer video rate control
IEEE Transactions on Circuits and Systems for Video Technology
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We present a two-level rate control approach for VC-1 to H.264 transcoding. First, a low complexity algorithm in which the key is to find the relationship between quantization parameters (QPs) in VC-1 to QPs in H.264. Second, a medium complexity algorithm in which the key is to use mean absolute differences and sum of absolute transform differences calculated in VC-1 to estimate the complexity of macroblocks in H.264 for a pixel/transform domain transcoder. The low complexity rate control tool has a limitation of only able to rate-control transcode for QP ranges from 10 to 29. To transcode the entire QP range we propose a combination of low and median complexities tools. Results show that the proposed rate control transcoding is less complex than that of a full-cascaded transcoder with regular rate control turned on, while maintaining target bit-rate and PSNR.