Constant-Quality CBR Rate-Control Algorithms for MPEG-4 Video Transcoding

Pai, Cheng-Yu; Lynch, William E.

doi:10.1109/icip.2006.312533

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…It was found that the CBR is preferable when the traffic is high and the constant quality approach is a better choice at low traffic network. In [12], a Laplacian rate/distortion model is introduced to predict the transcoder output quality and then the optimal frame QP or macroblock QP is selected to minimize the quality variation. In [13], the semi-fuzzy rate control algorithm is proposed.…”

Section: Related Workmentioning

confidence: 99%

Rate controlling for color and depth based 3D video coding

Kamolrat

Fernando

Mrak

2008

Applications of Digital Image Processing XXXI

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Rate control is a very important tool for any kind of video coding and transmission. Even though there are many rate control techniques designed for 2D video, not much work has been carried out in this area for 3D video. In this paper, a novel rate control approach for 3D video based on color and depth maps is introduced. The aim of this rate control algorithm is to keep the 3D video quality near constant. Since the 3D video is synthesized from color and depth maps and the final quality of 3D video is more influenced by color sequence rather than depth maps, the qualities of both color and depth maps are firstly varied until the target 3D quality is achieved with minimal bit rate. Subsequently, the PSNR of both color and depth maps at the optimum point are maintained for the entire group of picture (GOP). The bit-allocation problem is solved by introducing a Lagrangian optimization cost function. According to experimental results, the proposed rate control technique is capable to adjust the bit rate allocated to the color and depth maps sequences adaptively in order to maximize 3D video quality which is measured by PSNR of the synthesized left and right views using reconstructed color and depth map sequences

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Section: Related Workmentioning

confidence: 99%

Rate controlling for color and depth based 3D video coding

Kamolrat

Fernando

Mrak

2008

Applications of Digital Image Processing XXXI

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Prefetching Based Adaptive Media Playout for Seamless Media Streaming

Lee¹,

Jung²

2009

The KIPS Transactions:PartA

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Recently, with the advance of computing and networking technique, the high speed internet becomes widespread, however, it is still hard job to do streaming the media which requires high network bandwidth over the internet. Previous researches for streaming over the internet mainly proposed techniques that controls the QoS(Quality of Service) of the media in proportion to the network status. Though, this could be the solution for the service provider while the service user who wants constant QoS may not satisfy with variable QoS. In the paper, we propose a network adaptive prefetching technique, PAP, for guarantee of constant QoS. The PAP prefetches frames by increasing the frame transmission rate while the available network bandwidth is high. The PAP uses the prefetched frames to guarantee the QoS while the available network bandwidth is low and increases the playout interval to prevent buffer underflow. The experiment result shows that the proposed PAP could guarantee the constant QoS by prefetching the frames adaptively to the network bandwidth with the characteristic of video stream.

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Network Adaptive Prefetching for Constant QoS Guarantee in Media Streaming

Lee¹,

Jung²

2008

The KIPS Transactions:PartC

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Recently, with the advance of computing and networking technique, the high speed internet becomes widespread, however, it is still hard job to do streaming the media which requires high network bandwidth over the internet. Previous researches for streaming over the internet mainly proposed techniques that controls the QoS(Quality of Service) of the media in proportion to the network status. Though, this could be the solution for the service provider while the service user who wants constant QoS may not satisfy with variable QoS. In the paper, we propose a network adaptive prefetching technique, NAP, for guarantee of constant QoS. The NAP prefetches frames by increasing the frame transmission rate while the available network bandwidth is high. The NAP uses the prefetched frames to guarantee the QoS while the available network bandwidth is low. The experiment result shows that the proposed NAP could guarantee the constant QoS by prefetching the frames adaptively to the network bandwidth with the characteristic of video stream.

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Constant-Quality CBR Rate-Control Algorithms for MPEG-4 Video Transcoding

Cited by 3 publications

References 6 publications

Rate controlling for color and depth based 3D video coding

Rate controlling for color and depth based 3D video coding

Prefetching Based Adaptive Media Playout for Seamless Media Streaming

Network Adaptive Prefetching for Constant QoS Guarantee in Media Streaming

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