A constant-quality, single-pass VBR control for DVD recorders

Bagni, D.; Biffi, B.; Ramalho, R.

doi:10.1109/icce.2003.1218832

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…[3,4]), they can be converted to perceptual quality constrained problems. We can select a proper qp init for the fixed QP encoding in 2.1 that achieves the closest PSNR value to Q, and then the corresponding MS-SSIM value can be used as the new constraint.…”

Section: Quality Constrained Video Encodingmentioning

confidence: 99%

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Block-layer bit allocation for quality constrained video encoding based on constant perceptual quality

et al. 2013

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In lossy image/video encoding, there is a compromise between the number of bits (rate) and the extent of distortion. Bits need to be properly allocated to different sources, such as frames and macro blocks (MBs). Since the human eyes are more sensitive to the difference than the absolute value of signals, the MINMAX criterion suggests to minimizing the maximum distortion of the sources to limit quality fluctuation. There are many works aimed to such constant quality encoding, however, almost all of them focus on the frame layer bit allocation, and use PSNR as the quality index. We suggest that the bit allocation for MBs should also be constrained in the constant quality, and furthermore, perceptual quality indices should be used instead of PSNR. Based on this idea, we propose a multi-pass block-layer bit allocation scheme for quality constrained encoding. The experimental results show that the proposed method can achieve much better encoding performance.

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Section: Quality Constrained Video Encodingmentioning

confidence: 99%

“…There are many works for this quality constrained video encoding (e.g. [3,4]), most of them use multi-pass method to achieve the consistent quality, and face for the application of non-realtime encodings (e.g. DVD, streaming video, etc.).…”

Section: Introductionmentioning

confidence: 99%

Block-layer bit allocation for quality constrained video encoding based on constant perceptual quality

et al. 2013

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“…[6]) can address this issue by minimizing the maximum distortion among the sources, and thus achieve much smaller quality variation. Among them, most of the works aimed at minimizing the quality variation are doing at frame-layer, and based on the mean square error (MSE) or the peak signal to noise ratio (PSNR) [7,8]. In this paper, we attempt to optimize the bit allocation for MBs in a quantization-based encoder through the MINMAX criterion, aiming at consistent perceptual quality everywhere inside image/frame (hereafter referred to as "frame" collectively).…”

Section: Introductionmentioning

confidence: 99%

Block-layer optimal bit allocation based on constant perceptual quality

2012

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Bit allocation is a key issue in image/video coding. An optimal bit allocation can improve the encoding performance, which means to maximize the image/video quality in the constraint of bit rate, or vice versa, to minimize the bit rate with a restrictive quality. We suggest that the bit allocation for macro blocks (MBs) can be optimized by aiming at the constant perceptual quality (CPQ) inside an image/a frame. Based on the MINMAX criterion, we proposed a multi-pass block-layer bit allocation scheme for intra frame encoding, in which all the local areas in a frame get approximately the same perceptual quality by choosing the quantization parameter (QP) for each MB. The experimental results show that the proposed method can improve the encoding performance obviously.

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“…Such algorithms perform effectively, but the computational complexity and the two-pass nature make them unsuitable for realtime applications. To solve this problem, several single-pass constant-quality rate control algorithms have been developed [12]- [14]. In these algorithms, the quantization parameter for a frame is selected according to the statistics gathered from previously encoded frames.…”

Section: Introductionmentioning

confidence: 99%

Constant-Quality Rate Control Algorithm for Multiple Encoders with Single Video Source

Chen

2006

Eighth IEEE International Symposium on Multimedia (ISM'06)

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In this paper, we develop a constant-quality rate control algorithm for a surveillance system that consists of one "base encoder" for encoding a downsampled full-view version of the input video sequence and one "region of interest (ROI) encoder" for encoding the region of interest of the input video at the original resolution. Exploiting the inter-relationship between these two independent encoders, the bits for the ROI encoder are allocated according to the distortion obtained from the base encoder. Simulation results show that the proposed algorithm significantly reduces the image quality variation. The overall quality is improved and the bit-rate is saved as compared to the rate control algorithm in JM 8.4.

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A constant-quality, single-pass VBR control for DVD recorders

Cited by 3 publications

References 2 publications

Block-layer bit allocation for quality constrained video encoding based on constant perceptual quality

Block-layer bit allocation for quality constrained video encoding based on constant perceptual quality

Block-layer optimal bit allocation based on constant perceptual quality

Constant-Quality Rate Control Algorithm for Multiple Encoders with Single Video Source

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