Abstract:
Disclosed is a method for performing a handoff from an async base station to a sync base station when a mobile station with async and sync demodulation modules travels from a present cell of the async base station to a cell of the sync base station, the method including the steps of: the mobile station driving the sync demodulation module for a given idle sleep time to acquire and maintain the timing of the sync base station, during an operation in the cell of the async base station; during the handoff, the mobile station measuring the strengths of pilot signals from the adjacent sync base stations based on the acquired timing, and sending the measurement results to the async base station; the mobile station receiving from the async base station information necessary to establish a traffic channel with the sync channel; and the mobile station performing handoff to the sync base station according to the information necessary to establish the traffic channel.
Abstract:
An apparatus, method, and system for providing a broadcasting service in a Digital Multimedia Broadcasting (DMB) system with a Single Frequency Network (SFN). Networks of shadow and non-shadow regions can be distinguished in the digital broadcasting system. A conditional access system can be used in the shadow region. A terminal can select a service network. A broadcasting providing server encrypts broadcasting service data, generates private and public keys into which predetermined encryption keys are divided to decrypt the encrypted broadcasting service data, sets at least one broadcasting transmitter for transmitting the private key and/or at least one broadcasting transmitter for transmitting the public key, and provides the encryption keys along with the encrypted broadcasting service data. Broadcasting transmitters transmit the encrypted broadcasting service data received from the broadcasting providing server and the private key using the SFN. At least one of the broadcasting transmitters further transmits the public key.
Abstract:
An apparatus and method for supplying information so that power consumption in a digital broadcast receiving terminal can be reduced and a user can use an appropriate antenna depending on a situation. The digital broadcast receiving terminal includes an external antenna detachably assembled with the outside of the terminal a switch unit for selecting any one among the internal antennas and the external antenna, and a signal-receiving condition sensing unit capable of sensing the signal-receiving condition of the internal antennas and the external antenna. If it is impossible to receive the digital broadcast signal by using the internal antennas, the external antenna is used. If the external antenna is mounted, power is supplied only to an RF unit connected to the external antenna and the power supply to the remaining RF unit is cut off, reducing power consumption.
Abstract:
An apparatus and method for enabling a user to view a multimedia broadcasting, especially for processing a multimedia audio signal when a voice call is requested during the multimedia broadcasting. In the mobile terminal, an RF module converts a received RF signal for a voice call to a coded signal. An audio processor converts the coded signal to an electrical voice signal and outputs it through a speaker. A demultiplexer receives a digital multimedia signal and separates it into an audio signal and a video signal. A decoder decodes the audio and video signals and provides the decoded audio signal to the speaker and the decoded video signal to a display. A controller discontinues decoding the audio signal and outputs the voice signal from the audio processor through the speaker, if a voice call request is generated during receiving of the digital multimedia signal.
Abstract:
An apparatus and a method capable of receiving digital broadcasting without image discontinuity during channel switching. A digital multimedia broadcasting receiver buffers a previous channel while a new channel is buffered in a deinterleaver, thereby preventing image discontinuity during channel switching. The digital broadcasting receiver receives and deinterleaves broadcast data of a channel to be changed and stores the deinterleaved broadcast data in a buffer when a broadcast channel change is requested. The digital broadcasting receiver outputs and displays broadcast data of an initial channel stored in the buffer and stops output of the broadcast data of the initial channel and outputs the broadcast data of the channel to be changed, when the broadcast data of the channel to be changed are stored in the buffer by a predetermined buffering size.
Abstract:
Disclosed is a method and a device for receiving broadcasting service in a digital multimedia broadcasting system which provides the broadcasting service through a first radio path and a second radio path, in which the first radio path allows only digital multimedia broadcasting service to be received therethrough and the second radio path allows the digital multimedia broadcasting service and mobile communication service to be received therethrough, the method including updating information about a received signal input through the radio paths, determining whether the second radio path is switched on, determining a reason when the second radio path is switched off why it is switched off; comparing the information about the received signal with corresponding predetermined threshold values depending on a result of the determination of why the second radio path is switched off; and resetting the second radio path as ‘off’.
Abstract:
An apparatus and method for servicing both a wide area broadcasting and a local area broadcasting in a digital multimedia broadcasting system. The apparatus includes a means for transmitting program association tables and program map tables in a form of transport stream packets, wherein each of the program association tables includes packet identifications of program map tables corresponding to at least one wide area broadcasting program and at least one local area broadcasting program, and each of the program map tables includes detailed information about corresponding local area broadcastings.
Abstract:
An apparatus and method for providing secondary broadcast services in a digital broadcasting system including a transmitter and a receiver. The transmitter transmits summary information and control data of broadcast channels through a control channel while allocating the summary information and the control data to a data transmission section, and transmits a secondary broadcast corresponding to the summary information while allocating the summary information to at least one of a plurality of broadcast channels. The receiver receives a signal transmitted through the control channel, displays the summary information after retrieving the summary information from the data transmission section, and receives a broadcast channel through which the secondary broadcast corresponding to the summary information is transmitted when there is a request to receive the secondary broadcast.
Abstract:
Disclosed is an FFS (Fringe Field Switching) mode liquid crystal display. The FFS mode liquid crystal display comprises: a lower substrate and an upper substrate; a gate line formed on the lower substrate; a data line crossing perpendicular to the gate line; a first ITO electrode formed in a region defined by the gate line and the data line; a second ITO electrode of a comb-teeth pattern formed on the lower substrate while being overlapped on the first ITO electrode; and a black matrix formed on the upper substrate, wherein, a wedge portion of the second ITO electrode is formed at a position spaced by a predetermined interval to the inside from an edge section of the black matrix.
Abstract:
An apparatus and method for enabling a user to view a multimedia broadcasting, especially for processing a multimedia audio signal when a voice call is requested during the multimedia broadcasting. In the mobile terminal, an RF module converts a received RF signal for a voice call to a coded signal. An audio processor converts the coded signal to an electrical voice signal and outputs it through a speaker. A demultiplexer receives a digital multimedia signal and separates it into an audio signal and a video signal. A decoder decodes the audio and video signals and provides the decoded audio signal to the speaker and the decoded video signal to a display. A controller discontinues decoding the audio signal and outputs the voice signal from the audio processor through the speaker, if a voice call request is generated during receiving of the digital multimedia signal.