Dyadic spatial resolution reduction transcoding for H.264/AVC

Cock, Jan De; Notebaert, Stijn; Vermeirsch, Kenneth; Lambert, Peter; Walle, Rik Van de

doi:10.1007/s00530-009-0180-2

Cited by 6 publications

(3 citation statements)

References 17 publications

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“…Transcoding from a low cost encoder format to a low cost decoder provides a practical solution for these types of communications. Although H.264/AVC has been included in multiple transcoding architectures from other coding formats (such as MPEG-2 to H.264/AVC (Fernandez-Escribano et al, 2007 or even homogeneous H.264/AVC (De Cock et al, 2010), proposals in WZ to H.26x to support mobile communications are rather recent and there are only a few approaches so far.…”

Section: Wz To H26x Transcodingmentioning

confidence: 99%

Mobile Video Communications Based on Fast DVC to H.264 Transcoding

Garcia¹,

Escribano²,

Martínez³

et al. 2012

Video Compression

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IntroductionNowadays, mobile devices demand multimedia services such as video communications due to the advances in mobile communications systems (such us 4G) and the integration of video cameras into mobile devices. However, these devices have some limitations of computing power, resources and complexity constraints for performing complex algorithms. For this reason, in order to establish a video communications between mobile devices, it is necessary to use low complex encoding techniques. In traditional video codecs (such as H.264/AVC (ISO/IEC, 2003)) these low complexity requirements have not been met because H.264/AVC is more complex at the encoder side. Then, mobile video communications based on H.264/AVC low complexity imply a penalty in terms of RateDistortion (RD). However, Distributed Video Coding (DVC) (Girod et al., 2005), and particularly Wyner-Ziv (WZ) video coding (Aaron et al., 2002), provides a novel video paradigm where the complexity of the encoder is reduced by shifting the complexity of the encoder to the decoder (Brites et al., 2008). Taking into account the benefits of both p a r a d i g m s , r e c e n t l y W Z t o H . 2 6 X t r a n s c o d e r s h a v e b e e n p r o p o s e d i n t h e m u l t i m e d i a community to support mobile-to-mobile video communications. The transcoding framework provides a scheme where transmitter and receiver execute lower complexity algorithms and the majority of the computation is moved to the network where the transcoder is allocated. This complexity is thus assumed by a transcoder, which has more resources and no battery limitations. Nevertheless, for real time communications it is necessary to perform this conversion from WZ to H.264/AVC with a short delay, and then the transcoding process must be executed as efficiently as possible.At this point, this work presents a WZ to H.264/AVC transcoding framework to support mobile-to-mobile video communications. In order to provide a faster transcoding process both paradigms involve in the transcoder (WZ decoding and H.264/AVC encoding) are accelerated. On the one hand, nowadays parallel programming is becoming more important to solve high complexity computation tasks and, as a consequence, the computing market is www.intechopen.com Video Compression

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Section: Wz To H26x Transcodingmentioning

confidence: 99%

Mobile Video Communications Based on Fast DVC to H.264 Transcoding

Garcia¹,

Escribano²,

Martínez³

et al. 2012

Video Compression

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“…2). In this case, the existing mode mapping algorithms [21] cannot be used. However, this problem can be solved by the proposed machine learning method.…”

Section: B Arbitrary Downsizing Architecturementioning

confidence: 99%

Performance analysis of machine learning for arbitrary downsizing of pre-encoded HEVC video

Van

Praeter

Wallendael

et al. 2015

IEEE Trans. Consumer Electron.

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“…In the literature different techniques exist for homogeneous transcoding such as [6] [7] and for heterogeneous transcoding [8] [9]. In the framework of SVC-based video transcoding, several techniques have been proposed in the recent past for introducing scalability in compressed bitstreams.…”

Section: Related Workmentioning

confidence: 99%

On the impact of the GOP size in a temporal H.264/AVC-to-SVC transcoder in baseline and main profile

et al. 2012

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Scalable Video Coding is a recent extension of the Advanced Video Coding H.264/AVC standard developed jointly by ISO/IEC and ITU-T, which allows adapting the bitstream easily by dropping parts of it named layers. This adaptation makes it possible for a single bitstream to meet the requirements for reliable delivery of video to diverse clients over heterogeneous networks using temporal, spatial or quality scalability, combined or separately. Since the Scalable Video Coding design requires scalability to be provided at the encoder side, existing content cannot benefit from it. Efficient techniques for converting contents without scalability to a scalable format are desirable.R. Garrido-Cantos ()・P. Cuenca ・A. Garrido

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Dyadic spatial resolution reduction transcoding for H.264/AVC

Cited by 6 publications

References 17 publications

Mobile Video Communications Based on Fast DVC to H.264 Transcoding

Mobile Video Communications Based on Fast DVC to H.264 Transcoding

Performance analysis of machine learning for arbitrary downsizing of pre-encoded HEVC video

On the impact of the GOP size in a temporal H.264/AVC-to-SVC transcoder in baseline and main profile

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