摘要:
A transmitting apparatus includes a down-scaler configured to down-scale multimedia data; a first encoder configured to encode the down-scaled multimedia data; a first transmitter configured to transmit the encoded multimedia data through a first transmitting network; a decoder configured to decode the encoded multimedia data; an up-scaler configured to up-scale the decoded multimedia data; a restoration data generator configured to generate restoration data using the up-scaled multimedia data; a second encoder configured to encode the restoration data; and a second transmitter configured to transmit the encoded restoration data through a second transmitting network.
摘要:
Provided are method and apparatus for transmitting and receiving a multimedia streaming service via a network. The method of providing a multimedia streaming service includes: dividing encoded data of a video including at least one of a two-dimensional (2D) video and a three-dimensional (3D) video into fragments; determining at least one of 3D signaling information for each fragment and relationship information to be used when the video refers to other videos; and continuously transmitting the fragments including the property information regarding the fragments and encoded video data.
摘要:
A digital rights management (DRM) function performing method and system using a DRM device are provided, in which a DRM device connected to a second communication device decodes encoded contents when a first communication device requests to play the contents, the DRM device re-encodes the contents using a session key, and the DRM device transmits the re-encoded contents to the first communication device via the second communication device.
摘要:
A successive data processing method and apparatus is provided. A data processing apparatus, when connected to a data management apparatus, transmits apparatus information of the data processing apparatus, selects target process data, transmits target process information of the selected target process data, processes the target process data, and transmits process status information according to a process result of the target process data to the data management apparatus.
摘要:
The present invention comprises: a receiving unit for receiving, through different paths, a first signal including a left-side image and a first synchronization information item, and a second signal including a right-side image and a second synchronization information item; and a signal processing unit for synchronizing and reproducing the left-side image and the right-side image using the first synchronization information item and the second synchronization information item. At least one information item, from among a content start information item, a timestamp difference between a first data item and a second data item, a frame index, a time code information item, a UTC information item, and a frame count information item, can be used as the first and second synchronization information items. Accordingly, different data can be effectively synchronized.
摘要:
A method and system for updating time information of a digital rights management (DRM) includes a time server transmitting a time information message to a consumer electronics (CE) device, the CE device transmitting the time information message to a digital rights management DRM device when the CE device receives the time information message from the time server, and the DRM device updating a present time of the DRM device based on the time information message when the DRM device successfully performs authentication with respect to the time information message which has been transmitted from the CE device.
摘要:
A method for securely establishing a key against aggressive intervention of a third party. A first device generates a function value using a generator, which is selected from elements in a finite field, and an arbitrary number, which is less than a number of the elements of the finite field, hashes the function value, thereby generating a hashed value, and sends the hashed value and the function value to a second device. The second device hashes the received function value, and establishes a key using the received function value and another arbitrary number selected from the elements of the finite field when the hashed function value matches the received hashed value. Accordingly, it is possible to prevent a third device from intervening in their key establishment. Furthermore, a separate channel for the key establishment is not required because the key is established over a data communication channel.
摘要:
A method of key management in a network system. In a network system which includes at least one node group having a plurality of nodes, the method of key management includes setting commonly-shared keys for subsets of all, or a part of the plurality of nodes; storing a part of the set keys for each node; and generating the rest of the set keys by substituting the part of the set keys for each node in a predetermined function. As a result, the number of keys for storage by each node can be greatly reduced in the transmission of encrypted contents and updated encrypted keys.
摘要:
Method and apparatus for processing multimedia data received via different networks by synchronizing time stamps of video frames of multimedia data received via the different networks using time codes in the multimedia data.
摘要:
A transmitting device which transmits a plurality of streams is provided. The transmitting device comprises: a first multimedia data consisting of multimedia contents; a first synchronization information for synchronization of a second multimedia data consisting of multimedia contents; a first transmitting data including a first signaling data for the first multimedia data and a second signaling data for the second multimedia data, a data generating unit generating a second transmitting data including a second synchronization information for synchronization of the second multimedia data and the first multimedia data, a first transmitting unit transmitting the first transmitting data supplied from the data generating unit to a receiving device through a broadcasting network, and a second transmitting unit transmitting the second transmitting data supplied from the data generating unit to the receiving device through an IP network.