Kt Corporation | Date: 2016-12-15
A method for decoding an image, according to the present invention, comprises the steps of: receiving image information that corresponds to a block to be decoded; performing entropy-decoding with respect to the image information that is received; deciding a transform skip mode of the block to be decoded from a plurality of transform skip mode candidates, based on the image information that is entropy-decoded; and reverse-transforming the block to be decoded based on the transform skip mode that is decided.
KT Corporation | Date: 2017-01-17
A channel access method in a wireless LAN system is disclosed. The channel access method for a terminal comprises the steps of: receiving a beacon transmitted from an access point; determining a channel access slot of a terminal allocated on the basis of the beacon; transmitting a data transmission request from the channel access slot to the access point; and receiving data transmission slot allocation information corresponding to the data transmission request from the access point. Thus, the present invention can reduce power consumption of the terminal.
KT Corporation | Date: 2017-05-03
An approach for multipath communication of a terminal via a gateway is provided. The approach includes storing a whitelist including applications corresponding to multipath communication applicable objects, and generating, when a first application included in the whitelist is executed, at least one path connected to the gateway using at least one of multiplex communication interfaces.
Kt Corporation | Date: 2017-01-03
Disclosed is a content sharing method and system using an external memory. A method for transmitting encrypted contents to an external memory device list includes receiving a device list and public keys for devices, encrypting a domain key by using a public key to generate at least one device domain key, and transmitting the device domain key to the external memory. The method for performing encrypted contents further includes checking a public key of a device, extracting a device domain key corresponding to a public key checked by at least one device domain key stored in an external memory, decoding the extracted device domain key, decoding the encrypted contents by using the decoded device domain key, and performing the decoded encrypted contents. According to the present invention, since a single piece of contents stored in an external memory is reproducible by a plurality of devices, the existing problem of repeatedly settling the single piece of contents is solved and external memory resources are efficiently used.
Kt Corporation | Date: 2015-01-06
A method for decoding a multilayer video signal, according to the present invention, is characterized by: selecting, from a corresponding picture of at least one reference layer, a candidate reference picture of a current picture by using sublayer number information relating to the reference layer and a temporal ID of the current picture belonging to a current layer, determining the number of active references for a current picture based on the number of the candidate reference picture, acquiring a reference layer Identifier (ID) based on the determined number of active references, determining an active reference picture for the current picture using the reference layer ID, generating a reference picture list for the current picture, the reference picture list including a temporal reference picture and the active reference picture, and performing inter-layer prediction for the current picture based on the reference picture list.
Kt Corporation | Date: 2015-07-02
The present invention provides a method and apparatus for processing a multi-view video signal, the method including: determining a prediction mode of a current depth block; determining a partition mode of the current texture block when the current texture block is a block encoded in an inter mode; obtaining a motion vector of each partition based on the partition mode; and performing inter prediction on the current texture block by using the motion vector through depth-based.
Kt Corporation | Date: 2017-03-09
The present disclosure relates to an apparatus and a method for transmitting and receiving channel state information of a User Equipment that supports 256-state quadrature amplitude modulation (256QAM). The method may include: receiving a reference signal for measuring channel quality from a base station; measuring the channel quality based on the reference signal, and selecting a CQI index value from a predetermined CQI index table including CQI index values for 256QAM modulation, based on the measurement result of the channel quality; and transmitting channel state information including the selected CQI index value to the base station.
Kt Corporation | Date: 2017-03-08
The disclosure is related to a method of selecting one of access points based on multiple quality parameters in different frames. The method may include receiving a probe response frame from access points, analyzing quality parameters included in the received probe response frame to estimate wireless link quality of each access point, and selecting one of the access points based on the analysis result.
KT Corporation | Date: 2017-02-27
Disclosed is a method for changing an AID in a wireless LAN system. The method for changing an AID of a terminal by an access point comprises: a step of receiving an AID reassignment frame from the access point; a step of extracting an AID reassignment counter value from the AID reassignment frame; and a step of changing the AID of the terminal to the new AID included in the AID reassignment frame after the beacon periods of the access point indicated by the AID reassignment counter value extracted from the AID reassignment frame reception time have elapsed. Thus, a conflict between AIDs can be prevented.
KT Corporation | Date: 2017-06-14
Disclosed are a method for deriving a temporal predictive motion vector, and an apparatus using the method. An image decoding method may comprise the steps of: determining whether or not a block to be predicted is brought into contact with a boundary of a largest coding unit (LCU); and determining whether or not a first call block is available according to whether or not the block to be predicted is brought into contact with the boundary of the LCU. Accordingly, unnecessary memory bandwidth may be reduced, and implementation complexity may also be reduced.