Abstract: The use of traffic flag symbols allows a large number of CPEs to transmit traffic notifications to a network controller. In some such embodiments, hundreds of CPEs simultaneously transmit traffic flags on different subcarriers of a channel. For example, in a MoCA2 based access network, up to 480 CPEs can transmit flags in only 5 ?s in the 100 MHz-wide channel.

Abstract: An image sequence includes consecutive video images each exhibiting at least one image region having a number of pixels, where each pixel includes at least one intensity value. For each image a motion measure value is determined indicative of temporal change of a video content of the image region and varying the intensity values of the pixels of the image region relative to the associated intensity values from video image to video image, a measure for the variation of the intensity values being dependent on the motion measure value determined and the change in the intensity values relative to the associated intensity values being greater the larger the motion represented by the motion measure value.

Abstract: Various systems and methods for probing a communication channel. These systems and methods transmit an error vector probe packet from a first transmitter while a second transmitter is active and transmitting. A network device may receive the error vector probe packet and measure an error vector magnitude based on the received error vector probe packet. Using the error vector magnitude, the network device estimates channel characteristics such as signal-to-noise ratio, data capacity, etc. The transmission can occur when more than one transmitter is active and transmitting. At least some of the other transmitters are active and transmit an analog zero signal, e.g., all digital zeros on the input to the digital-to-analog converter of a network device when an error vector probe packet is transmitted.

Abstract: A method, system and computer program for transmitting at least two payloads in a downstream traffic phase of a time-division duplex (TDD) cycle with a single preamble from a headend followed by concatenated payloads without intervening preambles, whereby the payloads are ranked by increasing modulation profiles. The preamble, and concatenated and ordered set of payloads are then transmitted to two or more predetermined customer premise equipments (CPEs).

Abstract: Methods and systems for a digitally controlled oscillator may comprise, for example, an all-digital all digital phase locked loop (ADPLL) for generating an output clock signal from a reference clock signal, the ADPLL comprising a thermometer pulse coder comprising a plurality of frequency control word signal lines. the thermometer pulse coder may be configured to generate a frequency control word from a binary encoded frequency control word, where the frequency control word may comprise hermometer coded signals and a pulse modulated dither signal, and may select a frequency control word signal line over which to transmit the pulse modulated dither signal and may transmit the thermometer coded signals over another of frequency control word signal lines. A digitally controlled oscillator may be configured to receive a frequency control word and generate an output clock signal at a frequency determined using at least the frequency control word.

Abstract: Methods and systems for a wideband CMOS RMS power detection scheme may comprise: a first circuit including a first metal oxide semiconductor (MOS) transistor having a gate for receiving a radio frequency (RF) signal and having a drain for outputting a first current that is proportional to a square of a voltage of the RF signal in response to receiving the RF signal; and a second circuit connected to the first circuit, the second circuit comprising a second MOS transistor biased in a triode region and having a source for receiving the first current from the first circuit. The second circuit may output a voltage proportional to a power of the RF signal received by the first circuit, the output voltage being a function of the first current and a channel resistance of the second MOS transistor.

Abstract: A particular overall architecture for transmission over a bonded channel system consisting of two interconnected MoCA (Multimedia over Coax Alliance) 2.0 SoCs (Systems on a Chip) and a method and apparatus for the case of a “bonded” channel network. With a bonded channel network, the data is divided into two segments, the first of which is transported over a primary channel and the second of which is transported over a secondary channel.

Abstract: Methods and systems for frequency generation may comprise in a low-noise block down-converter (LNB) comprising an analog-to-digital converter (ADC) and a channel stacking switch (CSS): receiving a first satellite signal centered at a first frequency; receiving a second satellite signal centered at a second frequency; combining the first and second satellite signals to form a combined signal; the analog-to-digital converter transforming the combined signal from an analog signal to a digital signal; providing the digital signal to the CSS; receiving a third satellite signal centered at a third frequency; receiving a fourth satellite signal centered at a fourth frequency; translating the third satellite signal to a fifth frequency, combining the translated third satellite signal with fourth satellite signals to form a second combined signal; a second analog-to-digital converter transforming the combined signal from an analog signal to a second digital signal; and providing the second digital signal to the CSS.

Abstract: Various embodiments implement apparatuses and methods for conversion of radio frequency (RF) signals to intermediate frequency (IF) signals. More particularly, some embodiments are directed toward down conversion of RF signals to IF signals in a multi-band radio receiver, such as a satellite receiver, using a single oscillator for different frequency bands. For example, some of the apparatuses and methods presented are suitable for integration into monolithic RF integrated circuits in low-cost satellite receivers for home entertainment use.

Abstract: Methods and systems for frequency generation may comprise receiving a satellite signal the satellite signal having a center frequency; determining an amplitude response profile of the satellite signal; and computing the center frequency of the satellite signal based on the amplitude response profile of the received signal; and generating a reference signal at the computed center frequency. A center frequency of each of a plurality of satellite signals may be computed based on the computed center frequency. The determining the amplitude response profile may include: sweeping a tuner above and below a given reference frequency; measuring the received signal strength during the sweeping operation; and determining upper and lower rolloff points of the signal based on the measured signal strength.

Abstract: The invention relates to manipulation of sub-pictures (303) in a picture such as a mosaic screen (301). An apparatus comprises a sub-picture generator (105) connected to a mosaic screen generator (107), which generates the mosaic screen (301) from the sub-pictures. The mosaic screen (301) is by a video compressor (111) divided into uncompressed picture blocks such that each block only comprise video data from one sub-picture. The picture blocks are compressed using a block compression scheme such as MPEG-2. The apparatus further comprises a video manipulation processor (113), which manipulates the sub-pictures by manipulating the association between control data in the video signal and the compressed picture blocks. The video data of the compressed picture blocks are not affected whereby de-compression and new compression is avoided.

Abstract: A device for motion estimation in video image data is provided. The device comprises a motion estimation unit (11, 21) for estimating a current motion vector for an area of a current image by determining a set of temporal and/or spatial candidate motion vectors and selecting a best motion vector from the set of candidate motion vectors. The motion estimation unit (11, 21) is further adapted for substantially doubling one or more of the candidate motion vectors and for including the one or more substantially doubled candidate motion vectors in the set of candidate motion vectors.

Abstract: A method for extracting low-resolution video from compressed high-resolution video is disclosed. First, a video, comprising high-resolution frames encoded with a predictive coding technique, is input. At least one of the high-resolution frames is a reference frame. The reference frame is down-sampled to produce a first low-resolution frame with a first DC coefficient. Frequency coefficients corresponding to the first low-resolution frame are generated. Then, a second low-resolution frame is generated according to the frequency coefficients and the first low-resolution frame, the second low-resolution frame having a second DC coefficient. A residual error corresponding to the second low-resolution frame is generated. Finally, a third low-resolution frame is generated according to the frequency coefficients, the first low-resolution frame, and the residual error.

Abstract: An LDPC parity check matrix, includes a systematic portion having a plurality of systematic elements and a parity portion having a plurality of parity elements. The value of each systematic element determines a cyclic shift to be applied to rows of an identity submatrix corresponding to that element. The value of each parity element determines a cyclic shift to be applied to rows of an identity submatrix corresponding to that element. The weights of two or more columns of the parity portion are the same.

Abstract: Methods and systems are provided for spreading spectral density of pulse streams during digital to analog conversion. An example spreading circuit may comprise an accumulator circuit, a bit generator circuit, a comparator circuit, and an inverter circuit. The accumulator circuit may be operable to receive a signal to be spread and generate an output based on the signal to be spread and at least one other input. The bit generator circuit may be operable to input into the accumulator circuit zero-sum sequences. The comparator circuit may be operable to provide a stream of pulses based on the output of the accumulator circuit. The inverter circuit may be operable to invert output of the comparator circuit, wherein output of the inverter circuit is input into the accumulator circuit.

Abstract: A method and apparatus in which a Tap-Weight Computer (TWC) calculates a Tap-Weight Vector (TWV). The TWV is coupled to a register in each of a plurality of adaptive filter modules. Each such adaptive filter module includes several adaptive filters that each include a tapped delay line. The input to the tapped delay line of each such adaptive filter is one of a plurality of potential interfering signals. The TWV controls the weighting of the outputs from the taps off the delay line. The weighted outputs from each tapped delay line are then subtracted from a received signal which potentially includes interference from the potential interfering signals. The TWC is multiplexed to each of the plurality of adaptive filters so that each adaptive filter is loaded with a TWV calculated by the TWC to reduce the amount of interference contributed by a particular potential interfering signal coupled to an input to that particular adaptive filter.

Abstract: A method, apparatus, system, and computer program product for auto-installing an integrated receiver/decoder (IRD) includes issuing an auto-installation command from the IRD to an outdoor unit (ODU) and receiving a plurality of tones from the ODU in response to the auto-installation command, each tone representing a center frequency of available user bands (UBs). The auto-installation also includes acquiring a UB center frequency by the IRD, requesting the ODU to confirm a UB number corresponding to the acquired UB center frequency, and receiving confirmation from the ODU that a UB number corresponds to the acquired UB center frequency. The auto-installation also includes sending an acceptance of the assigned UB number from the IRD to signal the ODU that it may mark the assigned UB as assigned.

Abstract: In a method for adjusting the modulation of information onto subcarriers transmitted on a network, a first modulation profile of a network node on the network is set a first density. A plurality of messages in support of a link maintenance operation (LMO) on the network are monitored. The first modulation profile of the network node is updated to a second modulation profile having a second density. The updating is based on the monitored messages. Interference is detected by determining that a link between the first network node and a second network node on the network is not conveying a predetermined class of messages correctly. The first network node is set to a third modulation profile more robust than the first and second modulation profiles in response to the detected interference. The third modulation profile is common to each network node on the network.

Abstract: Systems and methods for generating a spurious signal cancellation signal, the system comprising two direct digital synthesizers (DDS). The first DDS provides phase tracking to correct for rounding errors. The second DDS outputs a frequency that is exactly equal to N/M*CLK, where N and M are values selected to set the output frequency equal to the frequency of a spurious signal to be cancelled, and CLK is a clock frequency used to clock the first and second DDS circuits.

Abstract: A data processing system comprising a plurality of interconnected nodes, each node comprising a media processor and one or more ports, each port connected to a respective media processor. Each port is configured to be active or passive, an active port being arranged, upon receipt of data, to transfer the received data to its output, a passive input port being arranged, upon receipt of data, to retain the received data and to transmit the received data to its output when the received data reaches a specific size, and a passive output port being arranged to trigger the receipt of data when the data capacity of the output port reaches a specific size.