129 Hits in 6.8 sec

Watermarking Video Clips with Workload Information for DVS

Yicheng Huang, Samarjit Chakraborty, Ye Wang
2008 21st International Conference on VLSI Design (VLSID 2008)  
We present a lightweight scheme for watermarking or annotating video clips with information describing the workload that would be incurred while decoding the clip.  ...  Our main contribution is a fast, low-cost bitstream analysis technique for estimating the decoding workload of a video clip.  ...  The Variable Length Decoding Task: The IDCT coefficients in MPEG-2 are encoded using variable length encoding, which involves Run-Length Coding followed by Huffman Coding.  ... 
doi:10.1109/vlsi.2008.103 dblp:conf/vlsid/HuangCW08 fatcat:2nhhsdhxfvai5lqsgmseethkxm

Performance optimization of the MPEG-2 to MPEG-4 video transcoder

Hari Kalva, Anthony Vetro, Huifang Sun, Jose F. Lopez, Juan A. Montiel-Nelson, Dimitris Pavlidis
2003 VLSI Circuits and Systems  
In this paper we present the software and algorithmic optimizations performed in developing a real time MPEG-2 to MPEG-4 video transcoder.  ...  The MPEG-2 compressed digital video content is being used in a number of products including the DVDs, camcorders, digital TV, and HDTV.  ...  A PMINSW operation with the upper bound of the clip range and a PMAXSW operation with the lower bound of the clip range clips the values to the range resulting in a reconstructed block.  ... 
doi:10.1117/12.498998 fatcat:x74kn36lbbcfxb4sq6pq3h3sru

Workload prediction and dynamic voltage scaling for MPEG decoding

Ying Tan, Parth Malani, Qinru Qiu, Qing Wu
2006 Proceedings of the 2006 conference on Asia South Pacific design automation - ASP-DAC '06  
In this paper we present three efficient DVS techniques for a MPEG decoder. Their energy reduction is comparable to that of the optimal solution.  ...  A workload prediction model is also developed based on the block level statistics of each MPEG frame.  ...  Input buffers and output buffers can be inserted before and after the MPEG decoder.  ... 
doi:10.1145/1118299.1118505 fatcat:rprzx563wnaerc3kutiitvr7mq

Memory Performance Optimizations For Real-Time Software HDTV Decoding

Han Chen, Kai Li, Bin Wei
2005 Journal of VLSI Signal Processing Systems for Signal, Image and Video Technology  
Pure software HDTV video decoding is still a challenging task on entry-level to mid-range desktop and notebook PCs, even with today's microprocessors frequency measured in GHz.  ...  improving at a fast rate during the past years. 10 11 12 13 Our study exploits concurrencies at macroblock level to alleviate the performance bottleneck in a software MPEG-2 decoder.  ...  Table 3 396 shows the time spent in the VLD, IDCT, MC and dis-397 play modules for all four video clips.  ... 
doi:10.1007/s11265-005-6650-7 fatcat:ak3cwkplijc35k3ez6oukibfta

Interfacing and scheduling legacy code within the Canals framework

Andreas Dahlin, Fareed Jokhio, Johan Lilius, Jerome Gorin, Michael Raulet
2011 Proceedings of the 2011 Conference on Design & Architectures for Signal & Image Processing (DASIP)  
In this paper we describe how the Canals language and its scheduling framework can be used for the purpose of scheduling and executing legacy code.  ...  The proposed approaches are applied to an existing MPEG-4 Simple Profile decoder for evaluation purposes. The inverse discrete cosine transform (IDCT) is accelerated by the means of OpenCL.  ...  As an example, video coding software is fairly complex because modern video standards, including MPEG-4 [2] , allow a bitstream to be encoded in a variety of ways.  ... 
doi:10.1109/dasip.2011.6136886 dblp:conf/dasip/DahlinJLGR11 fatcat:vtcje4lbdjdhzjwa7ndkgdy34i

Computer arithmetic for the processing of media signals

Vojin G. Oklobdzija, Aamir A. Farooqui, Franklin T. Luk
2000 Advanced Signal Processing Algorithms, Architectures, and Implementations X  
In this paper, we present the quantitative analysis and the computational complexity required to perform media processing.  ...  In order to support efficient processing of media signals, Instructions Set Architecture (ISA) of the traditional processors requires modifications.  ...  Recent MPEG-4 standard offers a much broader range of functionalities and coding modes then the previously defined standards, but still the block-level processing consumes the major portion of MPEG-4 video  ... 
doi:10.1117/12.406497 fatcat:xwcntznajva5lfufzs24xyyjr4

Exploring the Concurrency of an MPEG RVC Decoder Based on Dataflow Program Analysis

Ruirui Gu, J.W. Janneck, S.S. Bhattacharyya, M. Raulet, M. Wipliez, W. Plishker
2009 IEEE transactions on circuits and systems for video technology (Print)  
This paper presents an in-depth case study on dataflow-based analysis and exploitation of parallelism in the design and implementation of an MPEG RVC (reconfigurable video coding) decoder.  ...  Dataflow descriptions have been used in a wide range of digital signal processing (DSP) applications, such as applications for multimedia processing and wireless communications.  ...  INTRODUCTION U PCOMING MPEG video coding standards are intended to increase the quality and the flexibility of complex and versatile future video coding applications.  ... 
doi:10.1109/tcsvt.2009.2031517 fatcat:f4wk45mxejfwpk5bs7hevxh2xm

Efficient Video Decoding on GPUs by Point Based Rendering [article]

Bo Han, Bingfeng Zhou
2006 Proceedings of the ACM SIGGRAPH/EUROGRAPHICS conference on Graphics hardware - HWWS '04  
We propose a high performance implementation of IDCT on GPUs, which efficiently excludes most zero-value coefficients to save the bandwidth and the computations.  ...  We have demonstrated the efficiency of our proposed framework by a MPEG-2 decoder. Our results indicate a significant improvement over prior CPU and GPU solutions.  ...  We choose five different MPEG-2 video clips to evaluate the performance, as shown in Table 1 from HDTV or taken with HD cameras, which are aviable through links of the clip list in [VHD05] .  ... 
doi:10.2312/eggh/eggh06/079-086 fatcat:6eful6nbprdr5ckmmrr76rhtea

Software-Based Video/Audio Processing for Cellular Phones

Jin-Hwan Jeong, Chuck Yoo
2005 Telecommunications Systems  
Although the processing power of cellular phones is sufficient for most data applications, it is difficult to play video and audio contents in software because of their computational complexity and lack  ...  Next, various coding profiles as combinations of subalgorithms are studied, and we select a profile that adapts its complexity to the processing power of cellular phones.  ...  A media coprocessor usually handles a specific video format, which means that an MPEG-4 decoder chip can only decode MPEG-4 clips. The second is the cost.  ... 
doi:10.1007/s11235-004-5016-y fatcat:oztwzmlqaza5rprj3vs3wsieo4

Presentation processing support for adaptive multimedia applications

Edward J. Posnak, Harrick M. Vin, R. G. Lavender, Martin Freeman, Paul Jardetzky, Harrick M. Vin
1996 Multimedia Computing and Networking 1996  
PPE modules implement compression/decompression algorithms (e.g., JPEG, MPEG, etc.) as well as image processing functions such as rotate, scale, and dither.  ...  PPEs can be dynamically reconfigured to adjust to changes in the quality of service required.  ...  MPEG Decoder MPEG is a popular compression algorithm for digital motion video sequences.  ... 
doi:10.1117/12.235876 fatcat:5nknblfbtfhdvpozb6dot2mwty

Real-time perceptual watermarking architectures for video broadcasting

Saraju P. Mohanty, Elias Kougianos
2011 Journal of Systems and Software  
The watermark is inserted into the video stream before MPEG-4 compression, resulting in simplified hardware requirements and superior video quality.  ...  In this paper, a watermarking algorithm and corresponding VLSI architectures are presented that will insert a broadcaster's logo into video streams in real-time to facilitate copyrighted video broadcasting  ...  inverse (IDCT), Quantization, Zigzag Scanning, Motion Estimation, and Entropy Coding.  ... 
doi:10.1016/j.jss.2010.12.012 fatcat:bvgzzvisrngvpjwn5z736kwuo4

Mask-based fingerprinting scheme for digital video broadcasting

Sabu Emmanuel, Mohan S. Kankanhalli
2006 Multimedia tools and applications  
In this paper we propose a novel method to achieve video fingerprinting and confidentiality in a broadcasting environment.  ...  The additional advantage of the proposed scheme is that it also supports MPEG-2 compressed domain processing, which is useful for many broadcasting standards.  ...  The signal to noise ratio has been calculated for several video clips of MPEG-7 video categories and is plotted in figure 5 . The MPEG-7 video set consists of ten categories with 30 items.  ... 
doi:10.1007/s11042-006-0041-3 fatcat:u3v3tcm5ifdsjjgcvqjcpzy6ni

Efficient Transcoding of an MPEG-2 Bit Stream to an H.264 Bit Stream

R. Pereira, K.R. Rao, A. Kruafak
2006 2006 International Symposium on Communications and Information Technologies  
Sometimes small non zero inputs to the IDCT may result in zero outputs. If this occurs then mismatch may occur in some pictures. An encoder should avoid this by checking the output of its own IDCT.  ...  past ( [16] has been a widely accepted video coding standard for various applications ranging from DVD to digital TV broadcast [8] .  ... 
doi:10.1109/iscit.2006.340022 fatcat:2colqkkgc5hzlkeqcbluptpudu

The berkeley software MPEG-1 video decoder

Ketan Mayer-Patel, Brian C. Smith, Lawrence A. Rowe
2005 ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)  
This article reprises the description of the Berkeley software-only MPEG-1 video decoder originally published in the proceedings of the 1st International ACM Conference on Multimedia in 1993.  ...  and discusses the history of MPEG-1 video software decoding and the Berkeley MPEG research group.  ...  ACKNOWLEDGMENTS The MPEG video research at Berkeley would not have been possible without the generous financial support provided by our corporate sponsors Fujitsu, FX PAL, HP, NEC, Philips, Sony, and by  ... 
doi:10.1145/1047936.1047944 fatcat:pipl3vaubvhdnoiyesb47tbadm

Region-level approximate computation reuse for power reduction in multimedia applications

Xueqi Chen, M.S. Hsiao
2005 ISLPED '05. Proceedings of the 2005 International Symposium on Low Power Electronics and Design, 2005.  
Our experiments demonstrate that a 64-entry RACB can yield up to 70% of regionlevel execution reduction without noticeable quality degradation in MPEG-2 video decoding, corresponding to 55.9% of system  ...  Our experiments demonstrate that a 64-entry RACB can yield up to 70% of regionlevel execution reduction without noticeable quality degradation in MPEG-2 video decoding, corresponding to 55.9% of system  ...  EXPERIMENTAL RESULTS In this section, we present our results on a MPEG-2 video decoder (MSSG, transform from 'double' to 'float' for floating-point experiments) for a number of video clips.  ... 
doi:10.1109/lpe.2005.195499 fatcat:dh5yfw2gmjblrdkmb4kou4xmge
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