Yeonjeong Jeong

DRM applied contents share in digital home

DRM(Digital Rights Management) and CAS(Conditional Access System) techniques have been used to cut off the illegal use of contents. These techniques, however, resulted in much inconvenience as restricting the move or play of the content of even legal users. In this paper, we propose a new content share technique based on domain according to the increment of the demand about the flexible content use and share in digital home. The proposed scheme can prevent content being flowed out and cut off the illegal use as describing domain license in the extent of DRM license.

Audio DRM Conversion between Different DRM Content Formats

Currently audio content is protected by many kinds of DRM systems each of which adopts different DRM technology. It might be impossible to use the content governed by one DRM System at other DRM compliant device even within one users domain. In this paper, we propose a scheme that can converts one DRMs DRM content to other DRMs DRM content between different audio DRM systems to make it available in other DRM system.

DRM Content Adaptation Scheme Between Different DRM Systems for Seamless Content Service

Current studies on digital rights management (DRM) have focused on security and encryption as a means of solving the issue of illegal copying by purchasers. In this paper, we propose a scheme that can adapt one DRMs DRM content to another DRMs DRM content in PAV (portable audio & video) device environments. The proposed DRM content adaptation is for making one DRM system use another DRMs DRM content which is protected by another DRM system.

Protection scheme for secure MPEG-2 streaming

In this paper, we propose a protection scheme for MPEG-2 streaming media. To protect MPEG-2 media more effectively and securely, an encryption process should be considered on encoding phase of uncompressed stream and also a streaming server should be designed to support the protection scheme. However this way cannot support existing streaming systems and requires pre-processing such as demultiplexing and decoding. Our approach is to design a protection scheme independent to the streaming server. So, we propose an encryption method which can be applied to compressed MPEG-2 transport stream (TS). Proposed scheme can protect attacks over networks since streaming server streams pre-encrypted content and enables the client to decrypt the streamed data and playback in real time. Even though streamed content is stored in local system users who do not have available rights cannot use the encrypted content

DRM Content Adaptation Between Different DRM Systems for Seamless Content Service

DRM is a technology to protect digital contents from unauthorized access and to control the way a user consumes his content. Although modern DRM technologies carry out their duty very well as a protector of copyrighted contents but users face different problem, inconvenience due to the lack of interoperability between DRM systems. We have suggested a scheme to exchange DRM-protected contents between heterogeneous DRM systems by providing content exchange format not bound to specific DRM system. In this paper, we address the limitations of previous work and suggest a new content exchange scheme to solve the problem.

A trustworthy end-to-end key management scheme for digital rights management

Current studies on Digital Rights Management (DRM) have focused on security and encryption as a means of solving the issue of illegal copying by purchasers. In this paper, we propose an end-to-end key management scheme that can cover a content protection on the overall value-chains of content distribution. The proposed scheme can protect digital content from attacks since an encrypted content is sent by a first package server and only DRM client can decrypt the encrypted digital content. It makes it possible to protect content from content creator to purchaser.

Implementation of Digital Cinema Mastering System Supporting Multiple Encoding and Wrapping Servers

Digital Cinema Initiatives, LLC (DCI) has established DCI Digital Cinema System Specification (DCSS) which is intended to promote the widespread deployment of digital cinema. We propose a distributed mastering system of digital cinema. It can simultaneously encode Digital Cinema Distribution Master (DCDM) images into JPEG2000 images on remote servers and produce a Digital Cinema Package (DCP) and Key Delivery Message (KDM) that can be satisfied to DCSS. The distributed mastering system covers the packaging process of DCP for digital cinema content and the generating and issuing process of KDM for the DCP.

Implementation of digital cinema mastering system

Digital Cinema Initiatives released a set of technical specifications and requirements for Digital Cinema. We implement the mastering system of digital cinema that produces the Digital Cinema Package (DCP) which has been designed to deliver digital cinema contents such as image, audio and subtitle and Key Delivery Message (KDM) which contains the security information to be used to decrypt the DCP and will be issued to a specific Digital Cinema playback server. We propose a mastering system that covers the packaging process of DCP for Digital Cinema content and the generating and issuing process of KDM to protect the DCP.

Hierarchical Architecture for HEVC Parallel Encoder

The Emerging High Efficiency Video Coding (HEVC) standard offers a significantly better compression rate and higher video quality. HEVC encoders create very high CPU demand, and it is hard for a single core computer to deal with such complex coding computations. To process the high workload of HEVC coding for large-scale video data, the current HEVC draft contains several parallelizing approaches: tile-based parallelization and WPP-level parallelization. In this paper, we adopt additional data parallelism, GOP partitioning, to implement a parallel encoder. We propose the scalable cluster architecture of the HEVC encoder to achieve scalability and a high encoding speed by combining two levels of parallelism, GOP-level parallelism and the HEVC parallel method. The proposed scheme can reduce the large encoding time and significantly improve the coding efficiency. The proposed scalable cluster system is very suitable for high-resolution video such as 4K or 8K containing large amounts of video data.

Protection of Window Med ia Video by Faked FourCC

As content serviced for IP set-top boxes is mostly streamed over IP network, the existing hacking tools for IP network can be used to capture the streamed content. Until recently, most of the content serviced on IP set-top boxes have been MPEG-2 TS. But it is being moved to WMV, MPEG-4 or H.264 gradually because of the compression efficiency. In this paper, we propose a DRM scheme other than WMRM for streamed WMV (windows media video) content. Our approach is to design a DRM scheme independent to the existing WMV streaming server. It also can control the processing time of DRM considering device performance.