Adaptive Distortion-Based Intra-Rate Estimation for H.264/AVC Rate Control

Yan, Bo; Wang, Ming

doi:10.1109/lsp.2008.2010813

Cited by 32 publications

(34 citation statements)

References 12 publications

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“…In our proposed algorithm, if scene change happens, the current frame will be considered as the scene change frame. Then it will be encoded as the first I-frame in this sequence, and the QP will be computed using the proposed initial QP determination method according to (4) and (5).…”

Section: Scene Change Detection Based On Tv Measurementmentioning

confidence: 99%

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A Novel Total Variation Measurement Based Intra Frame Rate Control for H.264/AVC

Sun

Feng³

et al. 2012

2012 IEEE 12th International Conference on Computer and Information Technology

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Rate control plays a crucial role in controlling compression bitrates and encoding qualities for networked video applications. The intraframe quantization parameter is very important for enhancing video quality and retaining a limited bit budget. In this paper, we propose a new total variation (TV) measurement based distortion-quantization model, which is found to be a better measurement of perceived image quality than mean squared error. According to the proposed model, at the frame level, we give a method to decide the intraframe quantization step size by the mean distortion of previous coded frames in the last group of picture (GOP) to improve the coding quality and obtain the stable visual quality. In order to further improve Rate Control performance, based on TV measurement, an initial intraframe quantization step size model and a scene change detection method are also proposed. Experimental results show that, when compared with JVT-W042 rate control algorithm, adopted by H.264/AVC standard, the proposed algorithm achieved more accurate rate control in reducing frame skipping, decreasing quality fluctuation and improving the overall coding quality.

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Section: Scene Change Detection Based On Tv Measurementmentioning

confidence: 99%

“…Due to its efficiency, it has been adopted in H.264/AVC reference software. Afterwards, in order to improve RC performance, many H.264/AVC RC algorithms, focusing on different aspects, have been extensively studied in the literature [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

A Novel Total Variation Measurement Based Intra Frame Rate Control for H.264/AVC

Sun

Feng³

et al. 2012

2012 IEEE 12th International Conference on Computer and Information Technology

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“…As [7,8] pointed out, there is a quasi-linear relationship between the actual bits and its gradient value for I-frame. When it comes to the P-frames, they are reconstructed from the previous frames by motion estimation.…”

Section: P-frame's Complexity Measurement and Estimation Modelmentioning

confidence: 99%

“…The target bit is determined by considering both the relative complexity in (8) and the buffer occupancy in (9). …”

Section: Target Bit Determinationmentioning

confidence: 99%

Efficient P-frame complexity estimation for frame layer rate control of H.264/AVC

Sun

Yan

2011

2011 18th IEEE International Conference on Image Processing

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Rate control plays a significant role for high quality video coding. This paper presents a rate control method for H.264/AVC using a new bit allocation scheme for P-frame. This scheme is based on our proposed P-frame complexity measurement and estimation model. The measurement model considers not only the absolute complexity of the picture via average gradient, but also the relative histogram difference between two frames. Our proposed bit allocation scheme is able to allocate bitrate more efficiently for P-frame, which means allocating more bits to high-complexity frames and less bits to low-complexity ones. Experimental results show that our proposed method is able to achieve better quality than the original JVT-G012 and other existing methods.

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“…From the second GOP, the initial QP for an I-frame depends on the average QP of the P-frames in the previous GOP. The potential problem of this scheme is that given a bit budget when encoding the current I-frame, it is difficult to accurately estimate the QP since the characteristics of the current GOP are not considered [4][5][6]. However, it is quite important to control the quality of the I-frame to a suitable level for a fixed target output bit rate.…”

Section: Introductionmentioning

confidence: 99%

PSNR-based Initial QP Determination for Low Bit Rate Video Coding

Park

2012

Journal of information and communication convergence engineerin

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In H.264/AVC, the first frame of a group of pictures (GOP) is encoded in intra mode which generates a large number of bits. The number of bits for the I-frame affects the qualities of the following frames of a GOP since they are encoded using the bits remaining among the bits allocated to the GOP. In addition, the first frame is used for the inter mode encoding of the following frames. Thus, the initial quantization parameter (QP) affects the following frames as well as the first frame. In this paper, an adaptive peak signal to noise ratio (PSNR)-based initial QP determination algorithm is presented. In the proposed algorithm, a novel linear model is established based on the observation of the relation between the initial QPs and PSNRs of frames. Using the linear model and PSNR results of the encoded GOPs, the proposed algorithm accurately estimates the optimal initial QP which maximizes the PSNR of the current GOP. It is shown by experimental results that the proposed algorithm predicts the optimal initial QP accurately and thus achieves better PSNR performance than that of the existing algorithm.

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Adaptive Distortion-Based Intra-Rate Estimation for H.264/AVC Rate Control

Cited by 32 publications

References 12 publications

A Novel Total Variation Measurement Based Intra Frame Rate Control for H.264/AVC

A Novel Total Variation Measurement Based Intra Frame Rate Control for H.264/AVC

Efficient P-frame complexity estimation for frame layer rate control of H.264/AVC

PSNR-based Initial QP Determination for Low Bit Rate Video Coding

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