Journal Article10.1016/S0923-5965(99)00009-0
Rate control for MPEG video coding
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TL;DR: A new rate control approach which addresses the problems associated with degradation in picture quality at scene cuts and nonuniform picture quality due to buffer-dependent variations of the quantization parameter is presented.
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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 (ISO/MPEG II, Test Model 5, April 1993). There are, however, two problems associated with TM5 rate control: degradation in picture quality at scene cuts and nonuniform picture quality due to buffer-dependent variations of the quantization parameter. This paper presents a new rate control approach which addresses these issues. To eliminate the impact of scene cuts on the picture quality, the first scheduled P picture in a new scene is coded as an I picture, and the extra I picture is further balanced by coding the next scheduled I picture as a P picture. To achieve a relatively uniform picture quality, the same global quantization parameter is applied to all the macroblocks in a picture. The global quantization parameter is determined by using either an iterative or a binary search algorithm. The simulation results demonstrate that a significant improvement in performance is obtained using the proposed rate control approach.
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Citations
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Limin Wang Limin Wang,A. Vincent +1 more
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68
Rate Control Method Based on Deep Reinforcement Learning for Dynamic Video Sequences in HEVC
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59
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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Mathematical analysis of MPEG compression capability and its application to rate control
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- 23 Oct 1995
TL;DR: This paper presents mathematical frameworks of temporal predictive processing in the MPEG video compression standard and a novel framework of the target bit assignment provides drastic SNR gains to the conventional TM5 algorithm.
56
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