Results 311 to 320 of about 265,195 (378)

A multiplicative video watermarking robust to H.264/AVC compression standard

Signal processing. Image communication, 2018
The widespread application of the H.264 video compression standard necessitates proper design of copyright protection algorithms. In this paper, a new blind multiplicative video watermarking algorithm robust to this standard and also other attacks is ...
Faride Madine, M. Akhaee, Nematollah Zarmehi   +2 more
semanticscholar   +1 more source

Cover Block Decoupling for Content-Adaptive H.264 Steganography

Information Hiding and Multimedia Security Workshop, 2018
This paper makes the first attempt to achieve content-adaptive H.264 steganography with the quantised discrete cosine transform (QDCT) coefficients in intra-frames.
Yun Cao, Yu Wang, Xianfeng Zhao, Meineng Zhu, Zhoujun Xu   +4 more
semanticscholar   +1 more source

P-Picture Based H.264 AVC to H.264 SVC Temporal Transcoding

2008 International Wireless Communications and Mobile Computing Conference, 2008
This paper proposes a transcoding method from a standard (P-picture based) H264 advanced video coder (AVC) bitstream to a H264 scalable video coder (SVC) bitstream with temporal scalability. This method avoids full AVC decoding followed by full SVC re-encoding and is performed in two steps. The IPPP... AVC bit stream is first transcoded to an IpPpP AVC
Ali Dziri, Amadou Diallo, Michel Kieffer, Pierre Duhamel   +3 more
openaire   +1 more source

Shot boundary detection in H.264

2008 23rd International Symposium on Computer and Information Sciences, 2008
This study focuses on improving the available scene change detection methods developed for bit streams compressed with the latest coding standard H.264/AVC. Two algorithms that form the basis of our study are introduced and compared. Then, a method based on the combination of the two methods is proposed together with some improvements.
Kustutan, Sevtap, Kantarci, Aylin
openaire   +2 more sources

Transparent encryption techniques for H.264/AVC and H.264/SVC compressed video

Signal Processing, 2011
Transparent encryption of video content requires to provide a video preview that is left in plaintext, while the enhancement information is encrypted. In this paper we propose three algorithms that provide transparent encryption. The first two ones are based on the idea of generating controlled drift in such a way as to obtain the desired quality level,
MAGLI, ENRICO, GRANGETTO, MARCO, OLMO, Gabriella   +2 more
openaire   +3 more sources

MPEG to H.264 transcoding

SPIE Proceedings, 2004
H.264/MPEG-4 AVC is the latest video-coding standard jointly developed by the Video Coding Expert Group (VCEG) of ITU-T and the Moving Picture Expert Group (MPEG) of ISO/IEC JTC1. It uses to enhance significantly the compression rate when compared to previous standard in the field, especially the largely adopted MPEG-2 one. However, MPEG-2 is presently
Patrick Rault, Pankaj N. Topiwala
openaire   +1 more source

H. 264 encoder using Gstreamer

2015 International Conference on Circuits, Power and Computing Technologies [ICCPCT-2015], 2015
To satisfy the requirements of high quality and low bit stream video for real time applications, video compression techniques are used. The most powerful video formats for the video codec are Video Coding Experts Group (VCEG) and ISO/IEC JTC1 Moving Picture Experts Group (MPEG). It is frequently used in internet streaming sources i.e.
G. Sundari, T. Bernatin, Pratik Somani
openaire   +1 more source

H.264 deblocking filter enhancement

The 2011 International Conference on Computer Engineering & Systems, 2011
This paper proposes new software-based techniques for speeding and reducing the complexity of the deblocking filter used in the state-of-the-art H.264 international video coding standard to improve the visual quality of the decoded video frames. The proposed techniques are classified as standard-compliant and standard-noncompliant techniques.
Waseim Hashem Mahjoub, Hossam Osman, Gamal M. Aly   +2 more
openaire   +1 more source

H.264/AVC interpolation optimization

IEEE Workshop on Signal Processing Systems Design and Implementation, 2005., 2006
This paper discusses the optimization of the H.264/AVC sub-pixel interpolation operation in the context of a software implementation on a subword parallel processor. Several known algorithmic and architectural optimization approaches are combined to achieve a low-cost interpolation implementation.
T. Sihvo, J. Niittylahti
openaire   +1 more source

Idempotent H.264 intraframe compression

Multimedia Tools and Applications, 2009
This paper studies H.264 intraframe multi-generation characteristics and presents four mechanisms that contribute to the generation degradation. We analyze the H.264 transform and quantization and reveal that for some quantization parameters there always exists at least one clipping compensation matrix to make the H.264 intraframe multi-generation ...
Ziyuan Zhu, Tao Lin
openaire   +1 more source