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- W2023139219 abstract "Requantization transcoding is a method for reducing the bit rate of compressed video bitstreams. Most research on requantization is concerned with the architectural design, the selection of a suitable quantizer, or the reduction of requantization errors. In this paper, we propose to incorporate a new dimension in requantization transcoding: the quantization offset. We compare two requantization methods: increasing the quantization step size and decreasing the quantization offset. Furthermore, we propose a novel heuristic for requantization transcoding based on a theoretical rate-distortion analysis. The experimental results for H.264/AVC video show that requantization is improved in rate-distortion sense with gains up to 1 dB for open-loop requantization of B pictures compared to requantization with fixed quantization offset." @default.
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- W2023139219 date "2009-05-01" @default.
- W2023139219 modified "2023-09-27" @default.
- W2023139219 title "Leveraging the quantization offset for improved requantization transcoding of H.264/AVC video" @default.
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- W2023139219 doi "https://doi.org/10.1109/pcs.2009.5167466" @default.
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