Proceedings Article10.1117/12.206773
Rate control for MPEG video coding
Limin Wang
- 21 Apr 1995
- Vol. 2501, pp 53-64
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TL;DR: This paper proposes to code the first scheduled P picture after scene change as an I picture and the I picture in the following group of picture as a P picture to address the impact of scene changes on picture quality.
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Abstract: ISO/IEC MPEG-2 Test Model 5 (TM5) describes a rate control method which consists of three steps: bit allocation, rate control and modulation. There are basically two problems with the TM5 rate control. First, the quantization parameter for a macroblock is fully dependent upon the channel buffer fullness. Hence, macroblocks in a picture may not all be treated equally because of variations in buffer fullness, which may result in nonuniform picture quality. Secondly, the TM5 rate control does not handle scene changes properly because the target bit rate for a picture is determined based only on the information obtained from encoding of the pervious pictures. This paper presents a rate control approach which addressed these two problems associated with the TM5 rate control. A single quantization parameter is used for each picture, which guarantees that all the macroblocks in a picture are treated equally. To address the impact of scene changes on picture quality, we propose to code the first scheduled P picture after scene change as an I picture and the I picture in the following group of picture as a P picture. The simulation results demonstrate that a significant improvement is obtained using the proposed rate control.© (1995) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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Citations
Rate Control Method Based on Deep Reinforcement Learning for Dynamic Video Sequences in HEVC
TL;DR: Experimental results show that the proposed DRL-based RC method offers substantially enhanced RC accuracy and consistently outperforms HEVC reference software and other state-of-the-art algorithms.
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Bit allocation and constraints for joint coding of multiple video programs
Limin Wang,A. Vincent +1 more
TL;DR: This paper examines the bit-allocation issues for joint coding of multiple video programs and provides a bit- allocation strategy that results in a uniform picture quality among programs as well as within a program.
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Adaptive Intra-Frame Assignment and Bit-Rate Estimation for Variable GOP Length in H.264
TL;DR: The proposed adaptive group of picture (GOP)-length structure is proposed here to consider the scene changes and rapid motion in video sequences, and an intra-quantization parameter rule for avoiding buffer overflow and image quality fluctuation is suggested.
56
Rate control algorithm for fast bit-rate conversion transcoding
TL;DR: A new rate control algorithm is introduced as a solution for fast rate control requirements in transcoding by carrying out extensive simulations to find a novel R-Q (rate-quantization) model in the requantization process and found a piecewise linearly decreasing model.
40
Rate control of MPEG video for consistent picture quality
TL;DR: A rate control scheme using a rate-distortion (R-D) estimation model, which produces a consistent picture quality between consecutive frames, and error propagation, caused by quality degradation of anchor frames, is reduced by differentiating the control procedure for anchor frames from that for nonanchor frames.
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References
Displacement Measurement and Its Application in Interframe Image Coding
TL;DR: The motion compensation is applied for analysis and design of a hybrid coding scheme and the results show a factor of two gain at low bit rates.
Advances in picture coding
H.G. Musmann,Peter Pirsch,H.-J. Grallert +2 more
- 01 Apr 1985
TL;DR: This paper presents a review of the advances in digital coding of video signals during the last four years, and summarizes the first promising results of motion adaptive frame interpolation.
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Scene Adaptive Coder
Wen-Hsiung Chen,W. Pratt +1 more
TL;DR: An efficient single-pass adaptive bandwidth compression technique using the discrete cosine transform is described, demonstrating excellent results for coding of color images at 0.4 bits/pixel corresponding to real-time color television transmission over a 1.5 Mbit/s channel.