Filters








305 Hits in 9.5 sec

Requantization transcoding for H.264/AVC video coding

Jan De Cock, Stijn Notebaert, Peter Lambert, Rik Van de Walle
2010 Signal processing. Image communication  
The complexity of the presented architectures is significantly reduced when compared to cascaded decoder-encoder solutions, which are typically used for H.264/AVC transcoding.  ...  In this paper, efficient solutions for requantization transcoding in H.264/AVC are presented.  ...  Acknowledgment The research activities that have been described in this paper were funded by Ghent University, the Interdisciplinary Institute for Broadband Technology  ... 
doi:10.1016/j.image.2010.01.006 fatcat:dgjx2rnkrfhknly6l3uin4zgcy

Dyadic spatial resolution reduction transcoding for H.264/AVC

Jan De Cock, Stijn Notebaert, Kenneth Vermeirsch, Peter Lambert, Rik Van de Walle
2010 Multimedia Systems  
In this paper, we examine spatial resolution downscaling transcoding for H.264/AVC video coding.  ...  We present a spatial resolution reduction transcoding architecture for H.264/AVC, which extends open-loop transcoding with a low-complexity compensation technique in the reduced-resolution domain.  ...  Acknowledgements The research activities that have been described in this paper were funded by Ghent University, the Interdisciplinary Institute for Broadband Technology (IBBT), the Institute for the Promotion  ... 
doi:10.1007/s00530-009-0180-2 fatcat:hlpjfxl7i5guvckgan42szsopm

DCT Domain Transcoding of H.264/AVC Video into MPEG-2 Video [chapter]

Vasant Patil, Tummala Kalyani, Atul Bhartia, Rajeev Kumar, Jayanta Mukherjee
2006 Lecture Notes in Computer Science  
In this paper, we present novel techniques that can achieve conversion of pre-coded video in H.264/AVC standard to MPEG-2 standard directly in the compressed domain.  ...  H.264/AVC is a newly emerging video coding standard which achieves better video quality at reduced bit rate than other standards.  ...  So there is a need for transcoding H.264/AVC bitstream to other formats. In this paper, we consider a problem of converting a bitstream coded in H.264/AVC format to MPEG-2 one.  ... 
doi:10.1007/11949619_62 fatcat:ebgdyy5w4fatpcl6mdc53nqqpm

Effectiveness of Crypto-Transcoding for H.264/AVC and HEVC Video Bit-streams [article]

Rizwan A. Shah, Mamoona N. Asghar, Saima Abdullah, Martin Fleury, and Neelam Gohar
2019 arXiv   pre-print
Specifically, the paper outlines a joint crypto-transcoding scheme for secure transrating of a video bitstream.  ...  To avoid delays arising from a need to decrypt a video prior to transcoding and then re-encrypt it afterwards, this paper assesses a selective encryption (SE) content protection scheme.  ...  However, much legacy video content remains in H.264/AVC format or even in MPEG-2 codec format. However, it is possible to use format transcoding between MPEG-2 to H.264/AVC coding [22] .  ... 
arXiv:1902.06990v1 fatcat:ar4oivsygzcp3bc3iq6h5mj7tm

Application Of Large Macroblocks In H.264/Avc To Wavelet-Based Scalable Video Transcoding

Ebroul Izquierdo, Eduardo Peixoto, Toni Zgaljic
2011 Zenodo  
In order to maximize the use of the H.264/AVC MVs, the minimum size is chosen as 4 × 4 for any MB size.  ...  Using the H.264/AVC CBP If the H.264/AVC MVs for a partition can be reused, the refinement for this partition may be avoided based on the presence of residual data [13] .  ... 
doi:10.5281/zenodo.42470 fatcat:7rjmjkwukrbahbbttulol7appq

Conversion Scheme for DCT-Domain Transcoding of MPEG-2 to H.264/AVC [chapter]

Joo-kyong Lee, Ki-dong Chung
2005 Lecture Notes in Computer Science  
In this paper, we propose an efficient algorithm that converts the quantized 8×8 DCT block of MPEG-2 into newly quantized four 4×4 DCT blocks of H.264/AVC to support DCT-domain transcoding.  ...  The 4×4 approximate discrete cosine transform (DCT) of H.264/AVC [1] makes it difficult to transcode the pre-coded video contents with the previous video coding standards to H.264/AVC in DCT domain.  ...  Fig. 5 shows the reconstructed real images carried out the transcoding process at Qstep 20 for MPEG-2 encoding and at re-Qstep 6 for H.264/AVC transcoding.  ... 
doi:10.1007/11553595_68 fatcat:2pejlhgy4rfz5hnlih3wzq4vy4

Fast Transcoding from H.264 AVC to High Efficiency Video Coding

Dong Zhang, Bin Li, Jizheng Xu, Houqiang Li
2012 2012 IEEE International Conference on Multimedia and Expo  
In this paper, we present several strategies for transcoding from H.264/AVC bitstreams to High Efficiency Video Coding (HEVC) bitstreams.  ...  The proposed strategies can significantly reduce the transcoding complexity in terms of reduced processing for RDO evaluations, motion estimation, motion compensation as well as fractional pixel interpolation  ...  A new developed video coding standard always creates new requirement for transcoding from existed formats to the new format for the interoperability of video contents The H.264/AVC (shorten for AVC) [  ... 
doi:10.1109/icme.2012.112 dblp:conf/icmcs/ZhangLXL12 fatcat:42qycmxyknfo7du6pyzw6tzss4

A Multiple-Window Video Embedding Transcoder Based on H.264/AVC Standard

Chih-Hung Li, Chung-Neng Wang, Tihao Chiang
2007 EURASIP Journal on Advances in Signal Processing  
This paper proposes a low-complexity multiple-window video embedding transcoder (MW-VET) based on H.264/AVC standard for various applications that require video embedding services including picture-in-picture  ...  Experimental results show that, as compared to the cascaded pixel domain transcoder (CPDT) with the highest complexity, our MW-VET can significantly reduce the processing complexity by 25 times and retain  ...  Therefore, we conclude that the spatial domain technique is a more realistic approach for H.264/AVC-based transcoding.  ... 
doi:10.1155/2007/13790 fatcat:zeeybxkapnhxhg7csylas56rrq

Low-complexity transcoding algorithm from H.264/AVC to SVC using data mining

Rosario Garrido-Cantos, Jan De Cock, Jose Luis Martínez, Sebastian Van Leuven, Pedro Cuenca, Antonio Garrido
2013 EURASIP Journal on Advances in Signal Processing  
In general, video contents are compressed to save storage capacity and to reduce the bandwidth required for its transmission.  ...  Since the majority of the multimedia contents are compressed using H.264/AVC, they cannot benefit from that scalability.  ...  The first author would also like to thank the Spanish Public Employment Service for its funding support.  ... 
doi:10.1186/1687-6180-2013-82 fatcat:p3gwze5iyjf53pnu4zn7ozkusi

Coding Mode Analysis of MPEG-2 to H.264/AVC Transcoding for Digital TV Applications

Yi-Nung Liu, Chi-Sun Tang, Shao-Yi Chien
2007 2007 IEEE International Symposium on Circuits and Systems  
MPEG-2 to H.264/AVC transcoding is an important module for video recoding in digital TV applications. For pixel domain transcoding, MPEG-2 bitstream is decoded and then reencoded by H.264 encoder.  ...  The analysis result could be an important reference for the implementation of MPEG-2 to H.264 transcoder.  ...  A format is defined by many characteristics, such as the bit rate, frame rate, spatial resolution, coding syntax, and content.  ... 
doi:10.1109/iscas.2007.378428 dblp:conf/iscas/LiuTC07 fatcat:dy4k2dsoqjg5jbb6kd7mge3jae

Temporal video transcoding from H.264/AVC-to-SVC for digital TV broadcasting

R. Garrido-Cantos, J. De Cock, J. L. Martinez, S. Van Leuven, P. Cuenca, A. Garrido
2015 Telecommunications Systems  
Since existing infrastructures highly rely on H.264/AVC video compression, network providers could adapt the current H.264/AVC encoded video to SVC.  ...  after the H.264/AVC decoding stage.  ...  The first author would also like to thank Spanish Public Employment Service for its funding support.  ... 
doi:10.1007/s11235-014-9950-z fatcat:falwxfyupzexbj6y6ednrzz2am

Efficient Video Transcoding from H.263 to H.264/AVC Standard with Enhanced Rate Control

Viet-Anh Nguyen, Yap-Peng Tan
2006 EURASIP Journal on Advances in Signal Processing  
In this paper we investigate and present efficient syntax transcoding and downsizing transcoding methods from H.263 to H.264/AVC standard.  ...  A new video coding standard H.264/AVC has been recently developed and standardized.  ...  Specifically, the proposed methods aim to reduce the computational complexity while maintaining acceptable video quality for syntax transcoding and 2 : 1 downsizing transcoding from H.263 to H.264/AVC  ... 
doi:10.1155/asp/2006/83563 fatcat:sreyqg62yzhrlhqcj7g55y74pq

H.264/AVC over IP

S. Wenger
2003 IEEE transactions on circuits and systems for video technology (Print)  
In the older video compression standards (H.261, H.263, MPEG-1 Part 2 and MPEG-2 Part 2), the following error-resilience tools were already available: • different forms of picture segmentation (slices,  ...  Each slice encompasses a single line of macroblocks, similar to the way slices are commonly used in MPEG-2.  ... 
doi:10.1109/tcsvt.2003.814966 fatcat:5ivxtodrlnd3nbtxrwvzaln7sq

Improved H.264/AVC Requantization Transcoding using Low-Complexity Interpolation Filters for 1/4-Pixel Motion Compensation

Stijn Notebaert, Jan De Cock, Rik Van de Walle
2007 2007 IEEE Symposium on Computational Intelligence in Image and Signal Processing  
In our previous work, we introduced a hybrid architecture for requantization transcoding, which is able to reduce the bitrate for H.264/AVC bitstreams with quality results approaching the rate-distortion  ...  Transcoding is a fast technique for video adaptation, which offers great flexibility for changing the characteristics of already coded video sequences in order to match the properties of the terminal display  ...  ACKNOWLEDGEMENTS The research activities that have been described in this paper were funded by Ghent University, the Interdisciplinary Institute for Broadband Technology (IBBT), the Institute for the Promotion  ... 
doi:10.1109/ciisp.2007.369186 fatcat:nnrnekf775gp3bhlzxfd5wfz3e

Efficient Motion Vector Re-Estimation Based on a Novel Cost Model for a H.264/AVC Transcoder

Soongi HONG, Yoonsik CHOE, Yong-Goo KIM
2016 IEICE transactions on information and systems  
In transcoding, it is well known that refinement of the motion vectors is critical to enhance the quality of transcoded video while significantly reducing transcoding complexity.  ...  This paper proposes a novel cost model to estimate the rate-distortion cost of motion vector composition in order to develop a reliable motion vector re-estimation method that has reasonable computation  ...  The sequences were encoded in the H.264/AVC format with IPPP GOP structure, and then transcoded to new sequences at a 4-to-1 reduced frame size using the cascaded H.264/AVC Full-Decoding and Full-Encoding  ... 
doi:10.1587/transinf.2015edl8181 fatcat:uahwav7ojvd2lclychisczwyte
« Previous Showing results 1 — 15 out of 305 results