282 results about "Demultiplexer" patented technology

The invention provides a set top box with a WIFI (Wireless Fidelity) module. The set top box comprises a set top box body, wherein an external USB (Universal Serial Bus) interface, a functional press key, a power supply indication lamp, a signal locking indication lamp and an SD (Secure Digital) card reader socket are arranged on a front panel of the set top box body, wherein heat dissipation holes are arranged in side plates of two ends of the set top box body; an output interface, a user interactive interface and a three-network fused interface are arranged on a rear terminal board of the set top box body; the set top box body is internally provided with a main control circuit; the main control circuit comprises a main chip, a WIFI module, a demodulator, a TS (Transport Stream) demultiplexing device, a multimedia decoder, a multimedia encoder, a flash memory, an inner memory and an input/output control circuit. According to the set top box disclosed by the invention, network transformation cost is saved and a plurality of networks are fused and accessed; meanwhile, a television program is played and Internet is accessed or three-screen interaction is realized; and after an intelligent terminal passes through WIFIAP (Wireless Fidelity Access Point) authentication in real time, the intelligent terminal can be subjected to intelligent interaction with the set top box; and the invention provides a more flexible and humanized operation manner for users.

A mechanism for remoting Twain function calls within a user session to a client system is disclosed. By hooking Twain function calls made by a Twain application on the server, the Twain function calls may be remoted over a virtual connection to a client system. A proxy application corresponding to the server-based Twain application is created on the client system. The proxy application communicates with the server and makes the appropriate function calls to the remainder of the Twain framework. The use of the proxy application allows multiple applications and devices to be supported simultaneously. Messages sent over the virtual connection are filtered prior to transmission thereby limiting the amount of required communication traffic. A multiplexor and demultiplexor are utilized in order to efficiently use bandwidth on the virtual channel. The present invention additionally compresses image data prior to transmission over the virtual channel.

A transmission apparatus (101) includes: a license data input unit (202) that accepts an input of license data which permits reproduction of a storage content linked from a streaming content; a multiplexer (204) that generates multiplexed data by multiplexing the inputted license data on a broadcast content for a predetermined period of time; and an output unit (206) that transmits the generated multiplexed data to a content reproduction apparatus (102) via digital broadcast.

The content reproduction apparatus (102) includes: a receiving unit (301) that receives multiplexed data; a demultiplexer (302) that extracts license data and a broadcast content from the received multiplexed data; and a content reproduction unit (307) that reproduces the extracted broadcast content, and when obtaining a storage content whose reproduction is permitted based on the extracted license data, reproduces the obtained storage content based on the license data by switching the reproduction from the broadcast content to the storage content.

The invention relates to a set top box device with WIFI (Wireless Fidelity) hot spots. The set top box comprises a core circuit, a tri-network integration interface, an output interface and a user interaction interface; the core circuit comprises a main chip, a wireless network card, a demodulator, a Ts flow demultiplexer, a multimedia decoder, a multimedia encoder, a flash memory, an internal memory and an input and output control circuit; the three-network integration interface comprises a broadcasting network interface, a telecommunication network interface and an internet interface; the output interface comprises a video output interface and an audio output interface; the main chip is respectively connected with the wireless network card, the Ts flow demultiplexer, the multimedia decoder, the flash memory, the internal memory and the output and output control circuit; and the video output of the multimedia decoder is connected with the multimedia encoder and the audio output interface, and the audio output of the multimedia encoder is connected with the audio output interface. The set top box device disclosed by the invention supports multiple access modes, can be interacted with an intelligent terminal, realizes a touch screen-type remote control function and is capable of wirelessly transmitting programs to be received by the intelligent terminal.

An encryption device eliminates data contention and minimizes area by accessing twice data for a given time by using a memory device of two times faster access time. The encryption device for performing encryption of plain text blocks using data encryption standard algorithm, wherein the encryption device includes an initial permutation unit, a data encryption unit having n-stage (n is an even number) pipeline structure using a first clock, a second clock and a third clock, and an inverse initial permutation unit, the encryption device includes: a multiplexer for selecting one of n/3 48-bit inputs; 8 S-Boxes, each for receiving 6-bit address among the selected 48-bit and outputting 4-bit data; a demultiplexer for distributing 32-bit data from the S-Boxes to n/3 outputs; and a controller for control the multiplexer and the demultiplexer with a fourth clock and a fifth clock, wherein the fourth and the fifth clock are faster than the first, the second and the third clocks by n/3 times.

A VSB reception system includes a sequence generator for decoding a symbol corresponding to the supplemental data and generating a predefined sequence included in the supplemental data at VSB transmission system. The reception system also includes a modified legacy VSB receiver for processing the data received from the VSB transmission system in a reverse order of the VSB transmission system by using the sequence, and a demultiplexer for demultiplexing the data from the modified legacy VSB receiver into the MPEG data and the supplemental data. The VSB reception system also includes a supplemental data processor for processing the supplemental data segment from the demultiplexer in a reverse order of the transmission system, to obtain the supplemental data, thereby carrying out the slicer prediction, decoding, and symbol decision more accurately by using the predefined sequence, to improve a performance.

A tunable (reconfigurable) OADM provides multiple drop ports and multiple add ports by which desired channels can be removed from, or added to, a composite optical signal. In one embodiment, a programmable demultiplexer is arranged to receive an input signal containing components at x different wavelengths from an optical input port, and distribute the input signal components among K output ports. K−1 of the output ports are the “drop” ports of the OADM, and cumulatively contain w different wavelengths. The remaining port, which is the “through port” that carries the z wavelengths not dropped from the original input signal, is connected to the first port of an M port programmable multiplexer having M−1 other input ports. The remaining M−1 ports are the “add” ports of the OADM, which cumulatively receive v different wavelengths to be added by the OADM.

A set-top box system and method for viewing digital broadcasts. A set-top box system for viewing digital broadcasts includes: a plurality of televisions (TVs); and one set-top box for receiving digital broadcasts including multi-programs, and transmitting single programs selected by program selection requests of TV viewers to the plurality of TVs, the set-top box including: a memory having a program guide database of digital broadcasts; a tuner and demodulator for selecting and demodulating digital broadcasts of a main channel preset in the memory in the received digital broadcasts, and generating the demodulated digital broadcasts as a multi-program transport stream; a controller for controlling each of the sub-channels corresponding to each program selection request of the TV viewers by adopting packetized ID (Identification) information of the multi-program transport stream and the program guide database; a plurality of transport demultiplexers for selecting sub-channels responsive to each program selection request of the TV viewers upon receiving a control signal of the controller, and respectively providing single programs on the selected sub-channels; a plurality of single program decoders for decoding the single programs, respectively; and a transmitter for transmitting the decoded single programs.

Various embodiments of the present invention are directed multi-core memory modules. In one embodiment, a memory module (500) includes memory chips, and a demultiplexer register (502) electronically connected to each of the memory chips and a memory controller. The memory controller groups one or more of the memory chips into at least one virtual memory device in accordance with changing performance and/or energy efficiency needs. The demultiplexer register (502) is configured to receive a command indentifying one of the virtual memory devices and send the command to the memory chips of the identified virtual memory device. In certain embodiments, the memory chips can be dynamic random access memory chips.

A data packet transport arrangement includes a tag-based packet multiplexer and a tag-based packet demultiplexer, that utilizes an identification tag to identify packets to each of the N input channels so as to provide a logical transport channel for each of the N channels through the packet transport arrangement. The data transport arrangement thereby allows aggregating multiple communications channels into a higher bit rate link to increase bandwidth efficiency, without compromising the underlying channelized, guaranteed-bandwidth nature of the individual communication channels.

The invention provides an optical secret communication system based on chaotic random key distribution. A chaotic synchronization key distribution module in a sending end extracts a true random key from a chaotic signal and uses the true random key to drive an optical coding secret communication module to work, the optical coding secret communication module performs optical coding on secret data to be transmitted and converts the secret data into a secret communication signal, and a wavelength division multiplexer multiplexes the chaotic signal and the secret communication signal and sends themultiplexed signals to a receiving end through a transmission optical fiber; and a wavelength division multiplexing demultiplexer in the receiving end demultiplexes the received multiplexed signals to obtain a chaotic signal and a secret communication signal, a chaotic synchronization key receiving module adjusts the parameters to make the parameters matched with the parameters corresponding to the sending end, chaos synchronization of the receiving end and the sending end is achieved, a true random key is obtained and used for driving an optical decoding secret communication module to work,and the optical decoding secret communication module decodes received time domain type random noise signals to obtain original secret data.

The invention provides an optical module information interaction method and an optical module. A low-frequency signal used for indicating the optical module to perform emission wavelength switching and reporting digital diagnosis monitoring information or system upgrading is loaded on a normal service signal between optical modules of optical network near-end equipment and optical network far-endequipment. Thus, after the optical module of the optical network far-end equipment is online, the wavelength corresponding to the corresponding optical wavelength division multiplexer/demultiplexer channel is automatically modulated, and in the use process, the digital diagnosis monitoring information is automatically reported and the system is automatically upgraded, so that the workload of workers can be reduced. Meanwhile, the low-frequency signal is loaded on the basis of the normal service signal, the function of the message channel is increased, and the normal service communication function is not influenced.

The invention relates to a monolithically integrated multi-wavelength differential quadrature phase shift keying (DQPSK) demodulator and a manufacturing method thereof. The demodulator is provided with a 1*D wavelength division demultiplexer and D DQPSK demodulators which are integrated on the same waveguide substrate to form a waveguide structure chip. The method comprises the following steps of: monolithically integrating the wavelength division demultiplexer AWG and a plurality of multi-wavelength optical DQPSK demodulators with delay line interferometers on the same waveguide substrate by planar optical waveguide technology to manufacture the waveguide structure chip; manufacturing a metal film micro-heater on one of two arms of each optical delay line interferometer forming the DQPSK demodulator by a photoetching, sputtering and stripping semiconductor process to realize phase control; adhering a thermoelectric cooler (TEC) to a chip substrate to control the temperature of the whole chip; and respectively connecting the metal film micro-heater and the TEC with an error signal from a control feedback loop. The DQPSK demodulator has low cost, the process is simple and the method contributes to mass production.

An optical device which monolithically integrates a variety of structures to route or demultiplex data. One or more ring resonators are used to couple a control signal into and out of a waveguide loop residing within the optical device. The device includes a waveguide loop interferometer, such as a Sagnac loop, and a nonlinear element, such as a semiconductor optical amplifier, inserted in the loop. A ring resonator removes the control signal from the waveguide loop after it passes through the nonlinear element. The control signal is removed via a path that is independent of paths used for managing the flow of data through the optical device. Data is selectively outputted from one of two output ports, depending upon the state of the nonlinear device, as determined by the control signal.

A display device and a method of driving the same are provided. The display device includes a control signal generator that generates a control signal, a first demultiplexer that time-divides a data voltage from a first channel of a data driver and distributes the data voltage from the first channel to two or more data lines, in response to the control signal, a signal delay part that delays the control signal, and a second demultiplexer that time-divides a data voltage from a second channel of the data driver and distributes the data voltage from the second channel to other two or more data lines, in response to the control signal delayed by the signal delay part.