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Digital signage is a form of electronic display that shows information, advertising, messages, and TV programs in both public and private environments, including retail stores, hotels, and stations. We introduce another application of digital signage using smart devices. Unlike an existing digital signage displayed at a fixed location, the proposed digital signage system can see in anytime and anywhere...
The digital signage system is mainly installed on outdoor and used to convey an ad or information. Outdoor digital signage is used mainly LED, however, it has a lot of discomfort because of low resolution. So we developed the ultra-high resolution digital signage for 4K (UHD). The developed 4K digital signage system is composed of two parts. One is the production system that controls the client 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...
Digital signage contents are usually used to be displayed in fixed location. And many people interact with one device (displayer). User (retailer) plays a role for interaction with the device and the just viewer. So we propose the system that user plays an important role as delivering the signage contents through smartphone application. User can download and install the advertising smartphone application...
Digital Cinema Initiatives released a set of technical specifications and requirements for Digital Cinema. The mastering system of digital cinema produces the Digital Cinema Package (DCP) which has been designed to deliver digital cinema contents such as image, audio and subtitle between Digital Cinema content processing centers. We propose a mastering system that covers the packaging process of DCP...
This paper proposes the method for home service of digital cinema contents. In old times, however, it is possible for digital cinema to play only in a theatre, in these days it is also able to play the digital cinema contents in home according to the growth of the performance of a computer, display devices and network. It is difficult to provide theatre-like environment, however, the method proposed...
The Key Delivery Message(KDM) has been designed to deliver security parameters and usage rights between Digital Cinema content processing centers. We implement KDM system that consists of KDM server which can issue KDM to D-Cinema play server and content server which can receive a KDM request from D-Cinema play server and request KDM server to issue KDM for the D-Cinema play server. Proposed KDM system...
In this paper, we propose a novel bit-rate control using information of coded block pattern (CBP) based on statistical moments with respect to the amount of the bits from each macro-block, in an encoding of general video codec such as H.264/AVC and HEVC. Since the proposed bit-rate control is based on the simple computation using the quantization rules in the video codec, it is not necessary for an...
In this paper, we propose an analysis of fractional pixels which are interpolated from integer pixels using hierarchical linear FIR filters based on a differential structure of sub-pixels. In order to improve a video quality under a limited bitrate, most of video codecs employs fractional pixels (or samples) in a process of motion compensation or motion estimation. Even though the fractional pixels...
Digital Cinema Initiatives released a set of technical specifications and requirements for Digital Cinema. The KDM (Key Delivery Message)has been designed to deliver security parameters and usage rights between D-Cinema content processing centers. We propose a KDM system that covers the end-to-end process of KDM for D-Cinema content protection. It provides the end-to-end process of KDM from Mastering...
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...
DRM (Digital Rights Management) and CAS (Conditional Access System) techniques have been used to cut off the illegal use of contents. These techniques, however, brought about much inconvenience as restricting the move or play of the contents of even legal users. In this paper, we propose a new technique for sharing DRM contents based on domain according to the increment of the demand about the pliant...
A multicast transport scheme allows a plurality of users to receive the same content. It solves the waste of resource in network use in proportion to the number of users. However, since a current network environment of the Internet does not support the multicast transport, it is unavailable. Thus, a method of distributing a network load on a server through inter-PC re-transmission is currently used...
The purpose of the group key management is to provide a secure key sharing scheme among the users in a group on a broadcast or a multicast environment. CRGK[1] is the centralized group key management scheme based on the Chinese remainder theorem (CRT). It optimizes the number of rekey message, user-side key computation, and number of key storage. However, CRGK is suited for a small size user group...
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 user's domain. In this paper, we propose a scheme that can converts one DRM's DRM content to other DRM's DRM content between different audio DRM systems to make it available...
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 user's domain. In this paper, we propose a scheme that can converts one DRM's DRM content to other DRM's DRM content between different audio DRM systems to make it available...
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 DRM's DRM content to another DRM's DRM content in PAV (portable audio & video) device environments. The proposed DRM content adaptation is for making one DRM system use another DRM's DRM...
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