Patent application number | Description | Published |
20090125966 | DIGITAL CABLE BROADCASTING RECEIVER INCLUDING SECURITY MODULE AND METHOD FOR AUTHENTICATING THE SAME - A digital cable broadcasting receiver and a method of authenticating the digital cable broadcasting receiver, the digital cable broadcasting receiver includes: a security module unit to perform a device authentication process using two-way communication with a Head End (HE) system, and to transmit authentication verification information generated by the device authentication process to a receiver central processing unit (CPU); a demodulation unit to demodulate a broadcasting signal received from a tuner based on the authentication verification information, and to extract transport stream data; the receiver CPU to control power of the demodulation unit based on the authentication verification information; and a decoding unit to restore the transport stream data into image data. | 05-14-2009 |
20090141784 | CABLE MODEM AND DATA RECEIVING METHOD THEREOF - Disclosed are a cable modem and a data receiving method thereof. The cable modem includes a downlink channel retrieval processing unit to retrieve a downlink channel, receive an entire channel information message through the retrieved downlink channel, and receive a broadcasting supplementary data message when the entire information message is valid; a channel information processing unit to receive broadcasting supplementary data using the broadcasting supplementary data message; an uplink channel retrieval processing unit to retrieve an uplink channel using the entire channel information message; and a channel information managing unit to store and manage main data receiving channels capable of receiving the entire channel information message and the broadcasting supplementary data. | 06-04-2009 |
20090150974 | DIGITAL CABLE SYSTEM AND METHOD FOR PROTECTION OF SECURE MICRO PROGRAM - Provided is a digital cable system and method for protecting a secure micro (SM) client, and more particularly, a digital cable system and method for protecting an SM program that can improve the security of an SM program through authentication of a host and integrity verification of the SM program. A method of protecting an SM program includes: receiving host authentication information associated with a host from a trusted authority; verifying validity of the secure micro program based on the host authentication information; and sending, to an authentication proxy, a HostStateInformation message that includes host state information associated with validity verification information of the SM program. | 06-11-2009 |
20100154018 | METHOD AND APPARATUS FOR TRANSMITTING PACKET FILTERING INFORMATION - Disclosed are a method and an apparatus of transmitting packet filtering information. A DSG channel information management server included in a digital cable broadcasting transmission headend combines a packet address and information related to the packet address and generates the combined information to be a single file, the packet address being used for filtering packets received by a cable modem contained in a cable broadcasting receptor, for each data type. The generated file is transmitted from a CMTS to the cable modem through a packet having a designated address mutually agreed upon between the headend and the cable modem, the cable modem obtains information for selectively filtering the received packets, from the received file, and constructs a filter. Data selectively filtered through each constructed filter is transmitted to a corresponding process module included in the cable broadcasting receptor that processes broadcasting program information, conditional access information, and the like. | 06-17-2010 |
20130160048 | SYSTEM AND METHOD OF PROVIDING SIGN LANGUAGE BROADCASTING SERVICE - Provided is a system and method of providing a sign language broadcasting service to viewers having hearing impairments, and more particularly, the system and method of providing a sign language broadcasting service that may enable a user to select an option of viewing only a broadcast image, or an option to viewing both the broadcast image and a sign language interpreting image, by transmitting the broadcast image and the sign language interpreting image using different transport streams. | 06-20-2013 |