Class / Patent application number | Description | Number of patent applications / Date published |
380212000 | Plural video stream multiplexing | 12 |
20080205645 | Digital broadcast reception apparatus - A digital broadcast reception apparatus includes a first reception unit for receiving a certain digital broadcast, a second reception unit for receiving another digital broadcast, a control signal reception unit for receiving an update instruction signal that is instruction information indicating an update of software information, and a display control section for displaying, on a display, video images that correspond to contents of the certain digital broadcast received by the first reception unit. An IC card attached to the digital broadcast reception apparatus includes an update execution section which acquires the software information through the second reception unit and installs the acquired software information when the update instruction signal is received by the control signal reception unit. | 08-28-2008 |
20090028327 | SECURE CONTENT KEY DISTRIBUTION USING MULTIPLE DISTINCT METHODS - Systems and methods of secure content key distribution using multiple distinct methods are disclosed herein. Example embodiments include receiving multiple distinct control words from multiple conditional access systems and encrypting packets or a group of packets using the multiple distinct control words. | 01-29-2009 |
20090257588 | AV DATA TRANSMISSION APPARATUS AND AV DATA TRANSMISSION METHOD - An AV data transmission apparatus having two or more output channels, the apparatus comprising: an encryption unit which encrypts AV data using an encryption key; an AV data transmission unit which transmits the encryption key and the encrypted AV data to AV data reception apparatuses from each output channel; an encryption key switching unit which switches an encryption key generation scheme to another one for the encryption key transmitted through a selected output channel; an output suspension unit which suspends output of the encrypted AV data transmitted through a selected output channel; and a control unit which causes (i) the output suspension unit to select an output channel and suspend the output of the encrypted AV data through the selected output channel, and then causes (ii) the encryption key switching unit to select the same output channel and switch the encryption key generation scheme to another one for the output channel. | 10-15-2009 |
20100034378 | BROADCAST RECEIVING DEVICE FOR RECEIVING BROADCAST SIGNAL AND METHOD OF CONTROLLING THE SAME - Provided is a broadcast receiving device including a determining unit configured to make a determination on a channel selected by a selecting unit as to whether the corresponding encryption key is available or unavailable, and a control unit configured to, when the determining unit determines that the encryption key is unavailable, allow the selecting unit to sequentially select channels displayed in a channel window, allow the determining unit to make the determination, and allow an output unit to generate and output the channel window so that the channel with the encryption key determined as unavailable is identified. | 02-11-2010 |
20100091989 | SIGNAL TRANSMISSION APPARATUS AND SIGNAL TRANSMISSION METHOD - A signal transmission apparatus includes: a serial-to-parallel conversion unit serial-to-parallel converting HD-SDI format serial digital video signals of Link A containing CH | 04-15-2010 |
20110075842 | Method and System Making It Possible to Visually Encrypt the Mobile Objects Within A Compressed Video Stream - A method and system is provided of protecting at least one part of a video stream or of a compressed video sequence against a violation of the information contained in said stream, said stream being able to be broken down into at least one first type of objects and one second type of objects, the method being applied to a selection of images contained in said video sequence, characterized in that it comprises at least the following steps: analyzing the video sequence in the compressed domain so as to define for a given image N at least one first type of objects to be protected by encryption and one second type of objects, the analysis module which identifies the portions of the image belonging to the first type of objects to be protected sends the motion estimation vectors and the transformed coefficients to the encryption step; determining, according to the breakdown into portions or into groups of portions of the existing image N, those corresponding respectively to the first type of objects to be protected and to the other types; encrypting at least a part of the first type of objects; reconstructing, on the basis of the outputs of the preceding steps, a stream consisting of at least one first type of encrypted objects and other types of objects, to which is added information indicating which objects are the ones that have been encrypted. | 03-31-2011 |
20110211695 | BROADCASTING VARIANTS OF DIGITAL SIGNALS IN A CONDITIONAL ACCESS SYSTEM - The invention provides a headend system, a receiver, a smartcard and a conditional access system enabling distribution of multiple variants of a part of a digital signal, such as multiple variants of an audio part or a video part of a data stream, without requiring receivers to be updated. The digital signal generated by the headend system enables a receiver to receive and process the digital signal without requiring identification of the copies in the second digital signal. Error handling capabilities of the receiver ensure that only one copy is used in the output of the receiver. The error handling capabilities are triggered by having the receiver use one decryption key for descrambling all copies, resulting in one copy being descrambled correctly and the other copies being descrambled incorrectly. | 09-01-2011 |
20110243324 | Secure Network Coding for Multi-Resolution Wireless Video Streaming - Described herein is a method and system for hierarchical wireless video with network coding which limits encryption operations to a critical set of network coding coefficients in combination with multi-resolution video coding. Such a method and system achieves hierarchical fidelity levels, robustness against wireless packet loss and efficient security by exploiting the algebraic structure of network coding. | 10-06-2011 |
20110274274 | METHOD AND STREAM PROCESSING APPARATUS CAPABLE OF DISTINGUISHING BETWEEN DATA STREAMS INCLUDED IN INTERLACED STREAM BY REFERRING TO AUXILIARY INFORMATION - A method for processing an interlaced stream includes: receiving the interlaced stream and auxiliary information that are transmitted, respectively, wherein the interlaced stream has a plurality of data streams interlaced therein, and the data streams include at least one encrypted data stream; and generating reference information, utilized for distinguishing between the data streams included in the interlaced stream, by referring to the received auxiliary information. | 11-10-2011 |
20120257750 | ENCRYPTION TOPOLOGY FOR TRANSPORTING MULTIPLE AV STREAMS OVER A UNIFIED MEDIUM - A system architecture allows for the transmission of multiple HDCP encrypted audio/video streams over a single unified cable to multiple receivers using a daisy chain topology. Each individual audio/video stream is first encrypted and then combined into a uniform stream, and the uniform stream is transmitted to each of the receivers. Each receiver contains a decryption engine that operates independently of the engines in the other receivers, therefore allowing each receiver to select to a unique channel and decrypt and display one of the audio/video streams. | 10-11-2012 |
20140140506 | VIDEO SERVER AND CLIENT WITH CUSTOM KEY EXCHANGE AND METHODS FOR USE THEREWITH - A streaming video server stores playlist data corresponding to a plurality of video programs available from at least one video source. A command handler receives a program request for a selected one of the plurality of video programs from the at least one client device via the network interface and further receives a custom key request via a custom URI handler of the client device to access at least one encryption key. In response to the custom key request, the command handler sends secure key data to the client device in accordance with a custom key exchange protocol. | 05-22-2014 |
20140185803 | Secure Network Coding for Multi-Resolution Wireless Transmission - Described herein is a method and system for hierarchical wireless video with network coding which limits encryption operations to a critical set of network coding coefficients in combination with multi-resolution video coding. Such a method and system achieves hierarchical fidelity levels, robustness against wireless packet loss and efficient security by exploiting the algebraic structure of network coding. | 07-03-2014 |