Motion compensated multiresolution transmission of high definition video

Naveen, T.; Woods, John W.

doi:10.1109/76.276170

Cited by 42 publications

(12 citation statements)

References 17 publications

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“…Video encoding schemes with spatial scalability have been well studied [1,2,4,6,8,19] and fast transcoding schemes [14,16,17,23] for spatial size conversion have been proposed to support multiple resolutions in one video stream. However, these techniques have focused on downsizing each dimension by a factor of 2 or 4.…”

Section: Related Workmentioning

confidence: 99%

An experimental analysis of DCT-based approaches for fine-grained multiresolution video

2006

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In the future, video-streaming systems will have to support adaptation over an extremely large range of display requirements (e.g., 90 × 60 to 1920 × 1080). This paper presents the architectural trade-offs of bandwidth efficiency, computational cost, and storage cost to support fine-grained multiresolution video over a large set of resolutions. While several techniques have been proposed, they have focused mainly on limited spatial resolution adaptation. In this paper, we examine the ability of current techniques to support wide-range spatial resolution adaptation. Based upon experiments with real video, we propose an architecture that can support wide-range adaptation efficiently. Our results indicate that multiple encodings with limited spatial adaptation from each encoding provide good trade-offs between efficient coding and the ability to adapt the stream to various resolutions.

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Section: Related Workmentioning

confidence: 99%

An experimental analysis of DCT-based approaches for fine-grained multiresolution video

2006

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“…The transform coefficients of the enhancement layer can be predicted in the following manner while exploiting temporal redundancy [10], [11], [13]. A motion-compensated prediction of the current high-resolution frame is formed by replacing each block by its prediction (closest match in MSE sense) in the previous decoded high-resolution reference frame.…”

Section: A Overview Of Previous Workmentioning

confidence: 99%

A scheme for spatial scalability using nonscalable encoders

Dugad

Ahuja

2003

IEEE Trans. Circuits Syst. Video Technol.

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We describe a scheme that achieves spatially scalable coding of video by employing nonscalable video encoders (e.g., MPEG-2 main profile), along with a downsampler and an upsampler. The scheme is illustrated for the case of coding video at two resolutions. The enhancement layer is coded in two steps by first exploiting the spatial redundancy and then exploiting the temporal redundancy. Hence, the scheme has a separable implementation. Results are presented for five different sequences, coded for three different combinations of base and enhancement layer bit rates. When MPEG-2 main profile is used for the nonscalable encoders, the results obtained are comparable to the performance of MPEG-2 spatial scalability profile.

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“…It has been shown that backward compensation schemes can perform at comparable performance as forward schemes when dealing with high definition video. 4 Further In this paper the bit allocation between the resolution levels of a scalable wavelet coder with backward motion compensation is investigated. The hierarchical representation of the coded video signal is very efficient, since the number of transmitted coefficients never exceeds the number of pixels of the desired resolution.…”

Section: Introductionmentioning

confidence: 99%

<title>Optimized bit allocation for scalable wavelet video coding</title>

Wien

Bruenig

2000

SPIE Proceedings

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The hybrid coding scheme is employed in all established coding standards. A forward motion vector field is estimated and applied for motion compensation. The remaining prediction error and the motion vectors are transmitted to the decoder. The discrete cosine transform is used for transform coding of the prediction error. The extension of this coding scheme to scalability is not easily achieved and the performance of standard video coders when using scalability options can often be reduced to the performance of simulcast coding. In this paper a hierarchical spatial scalable wavelet video coder is presented. A backward motion compensation scheme is used and no motion vectors have to be transmitted. In this coding scheme the lowpass band of the decomposition is coded first without motion compensation using DPCM. The coarser levels of the signal decomposition which are known to both, the encoder and the decoder, are then employed for motion estimation of the next levels. Due to the hierarchical structure of the presented scheme the impact of quantization is strongly interdependent between the decomposition levels. In contrast to still image coding quantization affects the reconstruction quality as well as the motion estimation and motion compensation efficiency. In this paper the bit allocation for the decomposition levels of the hierarchical wavelet video coder is investigated.

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Motion compensated multiresolution transmission of high definition video

Cited by 42 publications

References 17 publications

An experimental analysis of DCT-based approaches for fine-grained multiresolution video

An experimental analysis of DCT-based approaches for fine-grained multiresolution video

A scheme for spatial scalability using nonscalable encoders

<title>Optimized bit allocation for scalable wavelet video coding</title>

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