摘要:
High compression rate codecs in gateways servicing Voice-over-Internet Protocol (VoIP) and Voice Band Data (VBD) calls distort modem/fax Answer Back Tones (e.g., 2100 Hz), which may lead to signal distortion and call hang-ups. To prevent such occurrences, a method or corresponding apparatus forces originating and terminating gateways to stay in a low complexity non-voice compression codec (e.g., ITU G.711) after prenegotiating a high complexity, voice compression codec (e.g., G.729 or G.726) during a short beginning period of a voice call. The low complexity codec avoids distorted answer back tone leakage associated with previous solutions that use a notch filter to block the leakage, thereby significantly improving the success rate of a VBD call by completely eliminating modem answer back tone distortion caused by high complexity codecs that use voice compression and by completely eliminating use of the notch filter.
摘要:
A method and apparatus for decoding transmissions in a wireless communications network is provided. A receiver includes a receive path. The receive path includes a decoder configured to perform low density parity check decoding. The decoder includes a number of Context Reconfigurable Instruction Set Processors (CRISPs). The CRISPs are configured to process received data in parallel. The decoder includes a plurality of memory units, and each of the CRISPs includes a plurality of processors.
摘要:
A clamping system for clamping aerofoils. The clamping system has pivotally mounted engagement members that engage the aerofoil mounted on a pivotally mounted arm either side of the pivotal mounting. The arm can pivot as required relative to the item, to accommodate differences in shape in the item, whilst providing a substantially equal clamping force by both engagement members.
摘要:
A method of operation for an engine including an electrically actuated engine valve in a cylinder head, with at least an actuator coupled to the valve, the method including applying a potential to generate a current indicative of temperature in the actuator at least partially during a substantially non-moving condition of the actuator and adjusting a timing of the application of the potential based on valve location in the cylinder head.
摘要:
A method for optimizing a software-defined radio system comprising a plurality of processors is provided. The method includes, for each of the plurality of processors, (i) providing an input burst comprising a first specified burst size, M, of input words to the processor for each of a plurality of configurations, each input word comprising an integer, and (ii) receiving from the processor an output burst comprising a second specified burst size, N, of output words generated by the processor based on the M input words for each of the configurations. An optimization factor is determined for each of the configurations based on the N output words generated by each processor for the configuration. An optimized configuration is identified from the plurality of configurations based on the optimization factor of each of the configurations.
摘要:
A retaining ring for use with electrochemical mechanical processing is described. The retaining ring has a generally annular body formed with a conductive portion and a non-conductive portion. The non-conductive portion contacts the substrate during polishing. The conductive portion is electrically biased during polishing to reduce the edge effect that tends to occur with conventional electrochemical mechanical processing systems.
摘要:
An apparatus and method for planarizing a surface of a substrate using a chamber separated into two parts by a membrane, and two separate electrolytes is provided. The embodiments of the present invention generally provide an electrochemical mechanical polishing system that reduces the number of defects found on the substrate surface after polishing. An exemplary electrochemical apparatus includes a physical barrier that prevents any trapped gas or gas generated during processing from residing in areas that can cause defects on the substrate. The process can be aided by the addition of various chemical components to the electrolyte that tend to reduce the gas generation at the cathode surface during the ECMP anodic dissolution process.
摘要:
A reconfigurable digital signal processor (DSP) comprises: a reconfigurable data path comprising a plurality of reconfigurable multiply-accumulate (MAC) units; and a programmable finite state machine for controlling the plurality of reconfigurable MAC units. The programmable finite state machine executes a first plurality of context-related instructions that cause selected ones of the plurality of reconfigurable MAC units to perform at least one of a defined set of functions consisting essentially of: i) Fourier transform functions; and ii) filter functions. The Fourier transform functions comprise a Fast Fourier Transform (FFT) function and an Inverse Fast Fourier Transform (FFT) function and the filter functions comprise a finite impulse response (FIR) filter function and an infinite impulse response (IIR) filter function.