Abstract: There is provided a method of operating a communication system, the communication system comprising at least a macrocell base station and a femtocell base station that is within the coverage area of the macrocell base station, the method comprising providing an indication of the noise rise or interference at the macrocell base station to the femtocell base station; and the femtocell base station adjusting a maximum permitted transmission power based on the indication.

Abstract: There is provided a method of operating a communication network comprising at least one macrocellular base station, and a plurality of femtocell base stations that are within the coverage area of the at least one macrocellular base station, the method comprising providing a proxy in a signalling path between the at least one macrocellular base station and the plurality of femtocell base stations, providing unidirectional signalling for the support of mobility and interference control from the at least one macrocellular base station to the proxy; and providing signalling for the support of mobility and interference control between the proxy and the plurality of femtocell base stations.

Abstract: There is provided a speech encoder for performing an algorithm that comprises obtaining (205) a plurality of open-loop pitch candidates from a current frame of a speech signal, the plurality of open-loop pitch candidates including a first open-loop pitch candidate and a second open-loop pitch candidate; obtaining (205) a voicing information from one or more previous frames; and selecting (280) one of the plurality of open-loop pitch candidates as a final pitch of the current frame using the voicing information from the one or more previous frames. In one aspect, the voicing information from the one or more previous frames includes a previous pitch of the one or more previous frames. In a further aspect, selecting the final pitch of the current frame includes selecting (210) an initial open-loop pitch from that has the maximum long-term correlation value.

Abstract: A processor architecture includes a plurality of processing elements and a bus structure. Each element has at least one input port and at least one output port, each port having at least a data bus and a valid data signal line. The bus structure contains a plurality of switches arranged to connect an output port of any first processing element to the input port of any second processing element for a time interval. Each processing element sets a value on the valid data signal line of its output port to a first logic state when the associated data bus contains a transfer value and to a second logic state when it does not contain a transfer value. Each processing element enters a waiting state for a predetermined time interval when the value on the valid data signal line of the associated input port is in the second logic state.

Abstract: There is provided a method of method of estimating a quality of a signal, the method in a first device comprising measuring a signal transmitted from a second device to a third device; determining a value of a metric from an autocorrelation function of the measured signal; and determining an estimate of the quality of the signal from the determined metric.

Abstract: A low bandwidth phase lock loop (PLL) arranged in a dual-loop configuration is disclosed. The first loop is a standard loop configuration using a crystal oscillator as a reference clock. The loop parameters for this first PLL can be optimized to work over a wide range of output frequencies, and with a minimum amount of jitter. The first loop outputs a reference signal, which is a VCO output. The second loop comprises a bang-bang detector configured to drive a digital loop filter, which then drives a phase interpolator. The phase interpolator manipulates the output phase. Since phase and frequency are related, where frequency is the derivative of phase, small frequency offsets can be made using a phase control signal, generated within the second loop based on the relation between the reference signal and the clock input signal. The second loop sets the jitter transfer bandwidth of the system.

Abstract: There is provided a method for placing a plurality of processes onto respective processor elements in a processor array, the method comprising (i) assigning each of the plurality of processes to a respective processor element to generate a first placement; (ii) evaluating a cost function for the first placement to determine an initial value for the cost function, the result of the evaluation of the cost function indicating the suitability of a placement, wherein the cost function comprises a bandwidth utilization of a bus interconnecting the processor elements in the processor array; (iii) reassigning one or more of the processes to respective different ones of the processor elements to generate a second placement; (iv) evaluating the cost function for the second placement to determine a modified value for the cost function; and (v) accepting or rejecting the reassignments of the one or more processes based on a comparison between the modified value and the initial value.

Abstract: In one embodiment, device for early stopping in turbo decoding includes a processor configured to receive a block of data to be decoded, compare hard decision bits resulting from decoding iterations and compare a minimum value of log likelihood ratio (LLR) of decoded bits against a threshold. The processor configured to match hard-decisions with previous iteration results. The processor may be configured to set an early stop rule after the matching hard-decisions with previous iteration results is matched. The processor may be configured to set an early stop rule when the minimum reliability of the output bits exceeds the threshold.

Abstract: Methods and apparatus for tail termination are provided that include a decoder that includes a processor configured to a forward state metric and a backward state metric wherein each iteration of an initial state of the backward state metric is fetched from a memory and is pre-computed without feedback from a decoding iteration. Each decoding iteration is substantially identical, and the backward state metric that is pre-computed is used for a subsequent iteration. The decoder may include a turbo decoder or a radix-4 decoder.

Abstract: Provided are devices, systems and methods for rate matching and de-rate matching on digital signal processors. In one embodiment, a device for rate matching and de-rate matching, includes an interface for receiving a plurality of blocks of data and digital signal processor configured to pre-compute permutation parameters common to the plurality of blocks, wherein the plurality of blocks are subject to a set of given puncturing parameters and receive a set of pre-computed puncturing thresholds. For one or more blocks in the plurality of blocks, the DSP computes a block signature from the pre-computed puncturing thresholds; matches the block signature to one of a set of pre-computed zone signatures, derives a zone index corresponding to the one pre-computed zone signature, and applies pre-computed permutation and puncturing transformations corresponding to the zone index to the block.

Abstract: Disclosed are various systems and methods for controlling a voice activity detector. In one example approach, a method is provided in which a voice over Internet protocol (VOIP) session is initiated in a first gateway with a second gateway. A plurality of jitter adaptation packets are transmitted from the first gateway to the second gateway. Also, the voice activity detector is disabled in the first gateway during the transmission of the jitter adaptation packets. The voice activity detector is enabled in the first gateway after the transmission of the jitter adaptation packets.

Abstract: An integrated circuit device for switching data has a plurality of input channels and a plurality of output channels. The device includes a switch for selectively connecting a subset of the output channels, mutually orthogonal, to the input channels by providing signal paths between the selected mutually orthogonal output channels and the input channels. The selected output channels are not orthogonal to the output channels that are not selected.

Abstract: A crosspoint switch device has a plurality of input ports each connected to a respective voltage source and a plurality of output ports each connected to a respective voltage source. A switch array selectively provides signal paths between the input ports and the output ports. The voltage sources are separate from one another.

Abstract: A projection system with one or more light sources reduced power consumption and optional scanning capability is disclosed. A controller processes image data to generate light source control signals and pixel screen control signals which are coordinated to generate an image. Reductions in power consumption occur by matching the light output from the light source to the brightest pixel(s) in the pixel screen for a particular frame. By setting the light output level to an intensity or duration matched to only the maximum level corresponding to a image frame, power consumption is reduced as compared to an embodiment which sets the light source output to its maximum level or maximum duration. The pixel screen, which may be an LCD screen, sets pixel areas corresponding to the brightest pixels as transparent and other, less bring pixels on the pixel screen are set to appropriate levels of reduced transparency.

Abstract: An optic module is disclosed having a memory configured to store data. To selectively control access to the memory and data stored in memory, a method and apparatus for memory access control is provided which creates access levels. The access levels include associated passwords, and read/write capability control, and address access range. During use a technician or other party would enter a password via an interface and the entered password is compared to the password associated with each access level. If a match is not found, then access to the memory, a hence data within the memory is denied. If a match is found the technician gains access to the data stored in the memory address range associated with the access level. Read and write access may also be granted or denied.

Abstract: There is provided a system and method for providing an integrated environment for execution monitoring and profiling of applications running on multi-processor system-on-chips. There is provided a method comprising obtaining task execution data of an application, the task execution data including a plurality of task executions assigned to a plurality of hardware resources, showing a scheduler view of the plurality of task executions on a display, receiving a modification request for a selected task execution from the plurality of task executions, reassigning the plurality of task executions to the plurality of hardware resources based on implementing the modification request, and updating the scheduler view on the display. As a result, the high level results of specific low level optimizations may be tested and retried to discover which optimization routes provide the greatest benefits.

Abstract: There is provided a method for use by a speech encoder to encode an input speech signal.

Abstract: There is provided a method of quantifying a voice quality in a telecommunication system including a first gateway in communication with a second gateway over a packet network. The method comprises deriving speech parameters from a first speech signal of a first talker received by the first gateway over a first communication line and a second speech signal of a second talker received by the first gateway from the second gateway over the packet network, determining a conversational impairment index using the speech parameters, deriving technology parameters based on voice technology and components in the telecommunication system, determining a technology impairment index using the technology parameters, and mapping the conversational impairment index and the technology impairment index into a conversational quality index to quantify the voice quality in the telecommunication system.

Abstract: There is provided a method of post-processing a speech signal. The method comprises applying a time-domain post-processing to the speech signal, using LPC coefficients, for a low-band frequency range and applying a frequency-domain post-processing to the speech signal, using MDCT coefficients, for the high-band frequency range. Applying the frequency-domain post-processing includes decoding an encoded speech signal to obtain MDCT coefficients representative of the speech signal divided into a plurality of sub-bands, generating an envelope for each sub-band of the plurality of sub-bands as an average magnitude of the MDCT coefficients of the sub-band, generating an envelope modification factor for each sub-band of the plurality of sub-band using the MDCT coefficients of the sub-band, modifying the envelope by the envelope modification factor for each sub-band of the plurality of sub-bands to provide a modified envelope, and generating the post-processed speech signal using the modified envelope.

Abstract: A method of speech encoding comprises generating a first synthesized speech signal from a first excitation signal, weighting the first synthesized speech signal using a first error weighting filter to generate a first weighted speech signal, generating a second synthesized speech signal from a second excitation signal, weighting the second synthesized speech signal using a second error weighting filter to generate a second weighted speech signal, and generating an error signal using the first weighted speech signal and the second weighted speech signal, wherein the first error weighting filter is different from the second error weighting filter. The method may further generate the error signal by weighting the speech signal using a third error weighting filter to generate a third weighted speech signal, and subtracting the first weighted speech signal and the second weighted speech signal from the third weighted speech signal to generate the error signal.