• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2000.11b
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• pp.101-106
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• 2000

We propose a method of the efficient injection of the MPEG-4 data into MPEG-2 A/V stream. The proposed method is to transmit MPEG-4 data synchronized with MPEG-2 A/V stream using MPEG-2 Transport Stream Protocol so that the user can decode MPEG-4 data on time at the client side, after extracting IOD (Initia1 Object Descriptor), OD (Object Descriptor), BIFS (Binary Format for Scone) and media data from mp4 file.

• Journal of Broadcast Engineering
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• v.5 no.2
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• pp.176-187
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• 2000

MPEG-4 is a digital bit stream format and associated protocols for representing multimedia content consisting of natural and synthetic audio, video and object data. This paper describes an application where multiple audio/visual data stream are combined in MPEG-4 and transported via MPTG-2 transport streams(TS). Also, this paper describes how to convert MPEG-4 Over MPEG-2 TS bit streams into MP4 file which Is designed to contain the media information of an MPEG-4 presentation in a flexible, extensible format. MPEG-4 is presented in the form of audio-visual objects that are arranged into an audio-visual scene by means of a scene descriptor and is composed of the audio-visual objects by means of an object descriptor. These descriptor streams are not defined MPEG-2 TS. So. this paper focuses on handling of these descriptors and parsing TS streams to get MPEG-4 data. The MPEG-4 Over MPEG-2 TS to MP4 format converter is implemented in the demonstrated systems.

• ETRI Journal
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• v.38 no.5
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• pp.829-837
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• 2016

In this paper, we introduce extension tools for MPEG Surround, which were recently adopted as MPEG-H 3D Audio tools by the ISO/MPEG standardization group. MPEG-H 3D Audio is a next-generation technology for representing spatial audio in an immersive manner. However, considerably large numbers of input signals can degrade the compression performance during a low bitrate operation. The proposed extension of MPEG Surround was basically designed based on the original MPEG Surround technology, where the limitations of MPEG Surround were revised by adopting a new coding structure. The proposed MPEG-H 3D Audio technologies will play a pivotal role in dramatically improving the sound quality during a lower bitrate operation.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.11C
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• pp.1049-1058
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• 2009

After the efficiency of H.264 video compression has been announced, it replaced MPEG-2 standard in several applications. So transcoding methods of MPEG-2 to H.264 have been studying because there are variety devices and contents followed by MPEG-2. Although H.264 supported various service such as IPTV, DMB, digital broadcasting etc, but users using MPEG-2 devices cannot accessible to them. This paper propose H.264 to MPEG-2 transcoding for users of MPEG-2 devices without displacement H.264. The proposed method predicted a motion vector for MPEG-2 encoder after it extracted from motion vectors of variable blocks in H.264 to improve processing time. Also it predicted a optimal motion vector using modified boundary matching algorithm after grasped a special character for boundary and background of object. The experimental results from proposed method show a considerable reduction in processing time, as much as 65% averagely, with a small objective quality reduction in PSNR.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.5C
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• pp.454-463
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• 2010

After the efficiency of H.264 video compression has been announced, it replaced MPEG-2 standard in several applications. So transcoding methods of MPEG-2 to H.264 have been studying because there are variety devices and contents followed by MPEG-2. Although H.264 supported various service such as IPTV, DMB, digital broadcasting etc, but users using MPEG-2 devices cannot accessible to them. This paper propose H.264 to MPEG-2 transcoding for users of MPEG-2 devices without displacement H.264. The proposed method predicted a motion vector for MPEG-2 encoder after it extracted from motion vectors of variable blocks in H.264 to improve processing time. Also it predicted a optimal motion vector using modified boundary matching algorithm after grasped a special character for boundary and background of object. The experimental results from proposed method show a considerable reduction in processing time, as much as 68% averagely, with a small objective quality reduction in PSNR.

• Journal of Broadcast Engineering
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• v.7 no.1
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• pp.28-36
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• 2002

In this paper. we propose an interactive broadcasting system based on MPEG-4 to provide Interactive services in digital TV broadcast. The proposed system is designed to support various functionalities such as authoringof MPEG-4. encapsulation of MPEG-4 Into MPEG-2 TS (Transport Stream) protocol, synchronization of MPEG-4 with MPEG-2 program. demultiplexing of MPEG-4 from MPEG-2 TS. decoding/rendering of MPEG-4 and interactivity through IP network on ATSC (Advanced Television Systems Committee) platform. The interactive broadcasting system based on MPEG-4 Is used to provide interactive functionality In full for user. and it has a particular advantage of substitution for the ATSC or DVB platform. as well.

• The KIPS Transactions:PartC
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• v.12C no.2 s.98
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• pp.175-182
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• 2005

This paper presents encryption techniques for digital right management solutions of MPEG-4 streams. MPEG-4 is a format for multimedia streaming and stored in the MPEG-4 file format. We designed three kinds of encryption methods, which encrypt macro blocks (MBs) or motion vectors (MVs) of I-, P-VOPs (Video Object Planes), extracted from the MPEG-4 file format. We used DES to encrypt MPEG-4 data Based on theses three methods, we designed and implemented a DRM solution for an Internet broadcasting service, which enabled a MPEG-4 data streaming, and then compared the results of decryption speed and quality of rendered video sequences to get an optimal encryption method.

• Journal of KIISE:Computing Practices and Letters
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• v.9 no.5
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• pp.509-520
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• 2003

In this paper, we developed a new and robust algorithm for a practical and very efficient MPEG-4 video coding. The MPEG-4 video group has developed the video Verification Model(VM) which evolved through time by means of core experiments. And in the standardization process, MS-FDAM was developed based on the standard document of ISO/IEC 14496-2 and VM as a reference MPEG-4 coding system. But MS -FDAM has drawbacks in practical MPEG-4 coding and it does not have the VOP extraction functionality. In this research, we implemented a preprocessing system for a real-time input and the VOP extraction for a practical content-based MPEG-4 video coding and also implemented the motion detection to achieve the high compression rate of 180:1.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2001.05a
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• pp.61-76
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• 2001

Our study focus on the investigations of the effect of IPRs, the relationship Digital TV with MPEG-2, and the MPEG LA stands. MPEG LA, which build up the strong patent pool, manage to IPRs system of MPEG-2. And we examine the influence of the effect for the. patent of Digital TV and IPRs based on MPEG LA Licensing agreement. Results of this study shows that to be valuable the IPRs of MPEG-2 related to Digital TV, Korea needs the strategies for effective IPRs negotiations and technical accumulation through offensive patent management, and so on.

• The Journal of the Korea Contents Association
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• v.2 no.3
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• pp.105-112
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• 2002

MPEG-4 is an international standard for interactive multimedia data that is used for next generation audio-visual service. It presents an two types of storage formal such as XMT (eXtensible MPEG-4 Textual fount) and MP4 file format D store the interactive multimedia contents. The XMT, a textual format, has advantage of readability and it can be used in many applications since designed based on the XML In this paper, we present the way how to author the MPEG-4 contents using XMT.