232 results about "DVB-H" patented technology

A data processing apparatus maps input symbols to be communicated onto a predetermined number of carrier signals of an Orthogonal Frequency Division Multiplexed (OFDM) symbol. The data processor includes an interleaver memory which reads-in the predetermined number of data symbols for mapping onto the OFDM carrier signals. The interleaver memory reads-out the data symbols on to the OFDM carriers to effect the mapping, the read-out being in a different order than the read-in, the order being determined from a set of addresses, with the effect that the data symbols are interleaved on to the carrier signals. The set of addresses are generated from an address generator which comprises a linear feedback shift register and a permutation circuit. In order to provide a 4 k mode for an OFDM modulated system such as a Digital Video Broadcasting (DVB) standard such as DVB-Terrestrial (DVB-T) or DVB-Handheld (DVB-H) standards, a generator polynomial for the linear feedback shift register of Ri'[10]=Ri-1'[0]⊕Ri-1'[2] is provided with a permutation order which has been established by simulation analysis to optimise communication performance via typical radio channels.

A method and apparatus of multi-Cyclic Redundancy Checking (CRC) are provided for section detection and reliability information acquisition in a Digital Video Broadcasting-Handheld (DVB-H) system. A Packet Identifier (PID) filtering process is performed for a packet received through a radio network. A transport stream packet including section data is detected. A CRC process is performed for a payload of an associated section using header information of the section data and frame buffering is processed. The method and apparatus can perform CRC in a parallel fashion using multiple CRC checkers without interference between adjacent sections and can perform section detection and reliability verification.

A method and system for increasing data rate in a mobile terminal using spatial multiplexing for digital video broadcasting for handhelds (DVB-H) communication are provided. A reconfigurable orthogonal frequency division multiplexing (OFDM) chip may be utilized in a mobile terminal to process received spatially multiplexed signals. The mobile terminal may be utilized in a spatially multiplexed multiple-input-multiple-output (SM-MIMO) wireless system. The spatially multiplexed signals may be quadrature phase shift keying (QPSK) modulated and may utilize OFDM subcarries. A processor may be utilized to configure the OFDM chip to process signals such as IEEE 802.11 and 802.16, and DVB. The OFDM chip may generate channel weights to be applied to the spatially multiplexed signals received in multiple receive antennas. The weighted signals may be combined to generate multiple RF received signals from which channel estimates may be generated. Subsequent channel weights may be dynamically generated from generated channel estimates.

Transmitting data in a digital video broadcasting for handheld (DVB-H) receiver comprises a transport stream (TS) demultiplexer adapted to extract internet protocol (IP) datagrams from TS data packets; a packet identifier (PID) filter adapted to extract the TS data packets based on the PIDs of the TS data packets; a Multi Protocol Encapsulation-Forward Error Correction (MPE-FEC) random access memory (RAM) unit operatively connected to the TS demultiplexer; a Reed-Solomon decoder operatively connected to the MPE-FEC RAM unit; an IP to TS encapsulator operatively connected to the MPE-FEC RAM unit; a TS multiplexer operatively connected to each of the PID filter and the IP to TS encapsulator, wherein the TS multiplexer is adapted to combine both DVB-Terrestrial (DVB-T) and DVB-H TS data packets into a single combined TS data packet; and a host interface operatively connected to the TS multiplexer.

An antenna structure comprises an unbalanced antenna for receiving digital video broadcasting signals. The antenna is dimensioned to fit within an electronic device, such as a mobile phone. The unbalanced antenna has a radiative element and a feed line connected to a matching circuit so as to achieve two or more resonances within a DVB-H frequency range, such as 470 to 702 MHz. The physical length of the radiative element is always smaller than λ / 4 at the frequencies of interest (470-702 MHz), but the electrical length can be smaller or substantially equal to λ / 4. The matching circuit can comprise one or more LC resonators depending on the number of resonances. The resonators can be series or parallel connected between the feed line and RF circuitry for processing the broadcasting signals. The antenna can be tuned to other bands above the DVB-H frequencies for use as a diversity or MIMO antenna.

A real-time program transmission system and method may receive a signal from a content source, and generate two different data streams. One stream may be of a higher quality than the other. The two streams may then be inserted into time slice frames, such that a single frame carries two portions of data: one corresponding to a first time segment in the program, and a second corresponding to a different time segment in the program. A receiving mobile terminal may buffer the received data, and may use the lower quality data as a backup in the event of a transmission error in the higher quality data.

Methods and systems for providing zapping data for one or more programs transmitted using timeslicing are disclosed herein. Zapping data may be provided by a zapping data provider or server, or may be created at the mobile terminal based on received program information. Zapping data may be provided to mobile terminals via a wireless multicast network, such as a DVB-H network, using a variety of timeslicing techniques, including providing a separate zapping data stream, providing zapping data as part of the source stream, or allowing mobile terminals to derive zapping data from the source content's broadcast stream. Zapping images may be selected from I-frames of video transmissions. An IP encapsulator may synchronize broadcast streams such that I-frames are transmitted concurrently, and at the beginning of timeslice bursts.

An antenna structure comprises an unbalanced antenna for receiving digital video broadcasting signals. The antenna is dimensioned to fit within an electronic device, such as a mobile phone. The unbalanced antenna has a radiative element and a feed line connected to a matching circuit so as to achieve two or more resonances within a DVB-H frequency range, such as 470 to 702 MHz. The physical length of the radiative element is always smaller than λ / 4 at the frequencies of interest (470-702 MHz), but the electrical length can be smaller or substantially equal to λ / 4. The matching circuit can comprise one or more LC resonators depending on the number of resonances. The resonators can be series or parallel connected between the feed line and RF circuitry for processing the broadcasting signals. The antenna can be tuned to other bands above the DVB-H frequencies for use as a diversity or MIMO antenna.

Disclosed is an apparatus and method for transmitting broadcast data in a digital broadcasting service system. The apparatus includes a server terminal for receiving a digital broadcast transport stream from a digital broadcast service provider, removing a header used for the digital broadcast reception from the received broadcast stream, and transmitting a stream of broadcast data from which the header has been removed; and at least one client terminal for accessing the server terminal through an Internet Protocol (IP) network, and receiving and outputting the stream of broadcast data from which the header has been removed. The apparatus enables the user to view DVB-H broadcasts through an existing terminal, even without buying a terminal having the ability to receive a DVB-H transport stream.

A packet encapsulator includes a filter module that identifies one or more carousel packets from a plurality of received packets. These one or more carousel packets are then stored in a packet buffer. The packet encapsulator also includes a channel queue for enqueuing packets for transmission across a broadcast transmission medium. For instance, the channel queue also receives the forwarding packets from the filter module. The channel queue also receives the one or more carousel packets from the packet buffer when at least a predetermined amount of available bandwidth exists in the broadcast transmission medium. The broadcast transmission medium may be a digital broadcast network such as a DVB handheld (DVB-H) network or a DVB terrestrial (DVB-T) network. Alternatively, the broadcast transmission medium may be a cable network.

Aspects of a method and system for a reconfigurable OFDM radio are presented. Aspects of the method may include reconfiguring a single OFDM chip to process a received DVB-H video broadcast signal and at least one of the following: a received IEEE 802.11 WLAN signal, and a received IEEE 802.16 MAN signal. Aspects of the system may include a processor that reconfigures a single OFDM chip to process a received DVB-H video broadcast signal and at least one of the following: a received IEEE 802.11 WLAN signal, and a received IEEE 802.16 MAN signal. A machine readable storage may include a computer program, having at least one code section that may be executable by a machine, that causes the machine to perform steps for reconfiguring a single OFDM chip as described above.

A system and method for implementing location-based content restrictions in a mobile video broadcast is provided. The invention utilizes DVB-H KSMs to transmit the restrictions and thereby enables the restrictions to be enforced by the mobile terminal receiving a broadcast video signal. This need for enforcement is determined as a function of the received KSMs and the physical location of the receiving terminal (as sensed using one or more accepted navigation technologies (e.g., Global Positioning System (“GPS”) technology, Assisted GPS (“AGPS”) technology, etc.).

A data transmission system and method for DVB-H signals for enhancing data robustness of a DVB-H receiver in additive white Gaussian noise (AWGN) channels includes transmitting IP datagrams from a DVB-H transmitter to the DVB-H receiver; applying a MPE section and a FEC section to the transmitted IP datagrams; mapping the transmitted IP datagrams to TS packets; aligning boundaries of the transmitted IP datagrams to a given number of TS packets; fixing a size of the IP datagrams to a known value at the DVB-H receiver; and extracting the IP datagrams from the DVB-H receiver.

Provided are apparatuses and methods in a digital broadcast transmission system for receiving, processing and rendering transmitted content. A digital receiver capable of receiving and rendering both DVB-H and DVB-T signals may include a coupling means for connecting to another terminal for receiving program data or parameters. The digital receiver may reconfigure one or more components in order to handle the differing signal types. Such a receiver system allows a user to move seamlessly from a mobile device to a stationary device without significant effort and time. The receiver may further use transmission streams of varying priority to enhance and otherwise modify the displayed content according to a user's selection. Users with small display screens or poor eyesight may benefit from such enhancements features.

A media file content provider 30 sends a non-permanent copy of a media file, such as a music or video file, to a second mobile station MS 34 in response to a request from a first MS 22. The copy may be rendered non-permanent by streaming it, by encrypting it, and by appending a first instruction to automatically delete it after playing. The first MS 22 may be given an option of delivery pathways, such as cellular 76, 78, WLAN 80, or DVB-H 84. After playing, an offer is made to the second MS 34 to purchase a permanent copy of the media file. If accepted, the content provider may provide another copy of the media file, or preferably a permanent decryption key or a second instruction that defeats the first instruction prior to its deletion of the media file.

Provided are apparatuses and methods for transmitting real-time service data in a digital broadcast network (e.g., DVB-H network), where gaps in the transmission are filled with non-real-time service data. Two types of service data are received as packets to be formed into time-slice bursts. Real-time service data, which typically varies in bit rate (e.g., streaming video), leaves gaps when capacity is reserved for it. These gaps are filled with non-real-time service data (e.g., file download) when forming time-slice bursts.

A wireless communication system is enhanced to allow for low-latency channel surfing and to enable a user to quickly see the content carried over a selected channel while searching channels for desired content. The techniques for reducing the channel change latency may be implemented in a transmitter, receiver, or in a combination of transmitter and receiver. The wireless communication system is optionally a DVB-H communication system. The transmitter may generate and transmit one or more auxiliary channels, where each auxiliary channel contains reduced resolution content corresponding to one or more channels. The receiver may process the one or more auxiliary channels to present the reduced resolution content while processing the full resolution channel for display. The receiver caches portions of content from one or more non-selected channels and presents the cached content when the channel is selected while concurrently searching and processing the full resolution channel content.

Techniques are provided that indicate the termination of a session. For instance, a final data packet of a transport session (e.g., an ALC session) is transmitted across a transmission medium within a time period. Also within this time period, an end of session (EOS) packet corresponding to the transport session is transmitted across the transmission medium. In addition, a further EOS packet corresponding to the transport session may be transmitted within a subsequent time period. The transmission medium may be a broadcast medium. Examples of such broadcast networks include DVB-H, DVB-T, and cable networks. Accordingly, the time periods may be time slices.

A communication system (100) is provided that comprises a Radio Access Network (110) having a Radio Network Controller (RNC) (114) coupled to each of a cellular Node B (112) and a Digital Broadcasting Video-Handhelds (DVB-H) Node B (120). When the communication system delivers low rate Multimedia Broadcast / Multicast Service (MBMS) user information, the user information is conveyed via the cellular Node B and a low data rate channel. When the communication system delivers high rate MBMS user information, the user information is conveyed via the DVB-H Node B and a high data rate channel. Thus the communication system provides high rate MBMS data services without imposing the system capacity constraints resulting from the employment of HSDPA by a cellular Node B.

According to a first aspect, the invention proposes a method for processing a transport stream (TS) received as an input transport stream in a processing device (SDR), the transport stream comprising a plurality of elementary streams (ES), each elementary stream (ES) being a set of transport stream packets having the same Packet IDentifier (PID), at least one of these elementary streams being time-sliced so as to be sent in bursts, timing information indicating within a burst the time to the beginning of the next burst, characterized in that it comprises the steps of: applying a filtering operation to the input transport stream so as to filter out from the input transport stream part or all of one or more time-sliced elementary streams; modifying the bursts scheduling of the input transport stream so as to generate a DVB-H compliant output transport stream from the filtered input transport stream. The invention also relates to a device for processing a transport stream comprising a plurality of time-sliced elementary streams, said device means for performing the method according to the first aspect of the invention, and to a transport stream carrying in-band configuration messages intended to be interpreted by the device for determination of the filtering operation to be applied to the input transport stream.

A system and method of performing re-synchronization for a Digital Video Broadcasting over Handheld (DVB-H) receiver comprises performing a time division multiplexing (TDM) data burst transmission sequence on bits of data received by the DVB-H receiver; performing a data bit re-synchronization sequence on the DVB-H receiver; and reducing a re-acquisition time at every stage of the data bit re-synchronization sequence, wherein the reducing process results in a reduction in the time to perform the re-synchronization for the DVB-H receiver, wherein the reduction in the time to perform the re-synchronization for the DVB-H receiver is greater than one-half of the time required to perform the re-synchronization for the DVB-H receiver absent the reducing of the re-acquisition time at every stage of the data bit re-synchronization sequence.

A method of mitigating power consumption in a DVB-H receiver is provided. The method may include predicting reception error(s) associated with a data burst to be received by the receiver, and deciding, based on the prediction result, to process or to eschew processing of MPE-FEC redundancy section(s) associated with the data burst, prior to the reception of the data burst. Predicting may include evaluating reception quality before receiving the data burst, by using data provided by the receiver's demodulator, wherein evaluating may be based on calculating a reception function (F) at the receiver, by using measured or calculated, scaled or weighted, parameter(s) associated with data received prior to the reception of the data burst. MPE-FEC redundancy section(s) associated with a received data burst may be processed only if the value of the reception function F is greater than a predetermined threshold value. Predicting may be based on data provided by the receiver's MPE-FEC unit. The scaling / weighting factors may be adjusted according to a policy to optimize reception conditions. Prediction may be enhanced by considering reception history, by utilizing reception function. A receiver is also provided, which utilizes the method.

Mediation systems and methods for hybrid networks including an IMS network. A system and method mediates an IMS network having a serving call state control function (S-CSCF) for providing session control for user endpoint (UE) devices with an alternative network to create a hybrid network. A service and corresponding service request code are defined to utilize at least a subset of capabilities provided by said alternative network. The S-CSCF is provisioned to identify and receive an alternative network service request message from a UE, including providing a call model having at least one filter code to associate said alternative network service code with at least one application server (AS) dedicated to serving alternative network service requests, said AS being responsive to service point triggers (SPTs). The AS is in communication with and capable of controlling delivery of at least a subset of services provided by said alternative network. The alternative network is a wireless broadcast network, such as a DVB-H network or a forward link only (FLO) network. The IMS network and S-CSCF and ASs are provisioned to provide two-way transport for interactive services for said hybrid network. The call model for alternative network services is constructed as a dynamic call model.

Techniques are provided that indicate the termination of a session. For instance, a final data packet of a transport session (e.g., an ALC session) is transmitted across a transmission medium within a time period. Also within this time period, an end of session (EOS) packet corresponding to the transport session is transmitted across the transmission medium. In addition, a further EOS packet corresponding to the transport session may be transmitted within a subsequent time period. The transmission medium may be a broadcast medium. Examples of such broadcast networks include DVB-H, DVB-T, and cable networks. Accordingly, the time periods may be time slices.

Provided are apparatuses and methods for reducing channel switching time in a network environment. The user of a mobile terminal may receive a data stream containing numerous television programs or services. Each of the programs or services may have a Packet Identification (PID) and / or IP address. The invention reduces channel switching time by predicting channel changing behavior. Various procedures are presented in which data is received and cached. The cached data may then be used to reduce the channel switching time during synchronizing and decoding of the new channel.

Mediation systems and methods for hybrid networks including an IMS network. A system and method mediates an IMS network having a serving call state control function (S-CSCF) for providing session control for user endpoint (UE) devices with an alternative network to create a hybrid network. A service and corresponding service request code are defined to utilize at least a subset of capabilities provided by said alternative network. The S-CSCF is provisioned to identify and receive an alternative network service request message from a UE, including providing a call model having at least one filter code to associate said alternative network service code with at least one application server (AS) dedicated to serving alternative network service requests, said AS being responsive to service point triggers (SPTs). The AS is in communication with and capable of controlling delivery of at least a subset of services provided by said alternative network. The alternative network is a wireless broadcast network, such as a DVB-H network or a forward link only (FLO) network. The IMS network and S-CSCF and ASs are provisioned to provide two-way transport for interactive services for said hybrid network. The call model for alternative network services is constructed as a dynamic call model.

An apparatus and method for enabling a terminal to continuously receive an on-going service even when the terminal moves out of a serving cell or a home network in a DVB-H CBMS system are provided, in which a network controls a handover, designates a target cell for the terminal if the terminal is to perform the handover on an interactive channel, and when needed, processes the handover over an interactive network.

A method, device and system for providing communication session mobility of multimedia content delivered to a mobile communication device, such as a Digital Video Broadcasting-Handheld (DVB-H) mobile video device. For example, multimedia content delivered to a mobile communication device via a DVB-H network can be transferred seamlessly to a cellular data network. Session mobility is provided using a control server or session controller configured to manage and facilitate the transfer of the content delivery. The control server manages the transfer in response to receiving appropriate communication session control information from the mobile communication device. The control server can be a network element coupled to or contained within the network that couples a multimedia content source to one or more wireless control points that communicate with the end user mobile communication device. Alternatively, the control server can be partially or completely included or contained within the multimedia content provider.

A demodulator, for example, a digital video broadcasting-handheld (DVB-H) demodulator may include an erasure table for storing erasure information, a multi-protocol encapsulation forward error correction (MPE-FEC) decoder configured to decode MPE-FEC data within an MPE-FEC frame based on the erasure information, and an erasure table controller configured to generate the erasure information based on a cyclic redundancy check (CRC) operation result regarding transport stream (TS) data to store the generated erasure information into the erasure table and output, to the MPE-FEC decoder, the stored erasure information corresponding to the MPE-FEC data when the MPE-FEC decoder decodes the MPE-FEC data. Therefore, the DVB-H demodulator may process the erasure information faster, for example, independently of a main processor, using the erasure table controller and / or the erasure table.

A DVB-H transmitter having a plurality of video encoders each having a variable bit rate associated with IP datagrams for each television program broadcast by one RF channel. A method is also provided for statistical multiplexing of video channels for DVB-H mobile TV applications, wherein the method includes jointly configuring a plurality of video encoders each having a variable bit rate associated with IP datagrams for each television program broadcast by one RF channel.