摘要:
A method is described for estimating the motion for image sequences carrying out a decimation of the function used for the extraction of the characteristic parameters of an image block. The method is iterated by decreasing the function decimation and carrying out the block-matching on a set of the best matchings of the preceding steps. The method does not require the recalculation of the parameters on the reference image for each block to be matched; moreover, in the extraction of the characteristic parameters of a block, the use of the Integral Projections is not mandatory but one of the possible variants only (FIG. 1).
摘要:
In order to switch selectively via a packets switching matrix waiting in the input modules (IMi) to address output modules, an arbitration function (CSC) selects by successive cycles, from all the pairs of input and output modules, separate subsets. Each cycle comprises p successive phases (x) associated respectively to p arbitration functions. Processing units (PUi) each execute the p functions, each function acting on three parameters termed “residual required quantity”, “input capacity” and “output capacity”, the values of which are related to a single pair and are set at the start of the cycle. Each phase consists of N successive steps (y) associated respectively to said subsets, each step being executed in parallel by the processing units (PUi) in order to calculate by means of the arbitration functions the “partial” accepted quantity values and to reset the parameters for the next step. Application to telecommunication networks, particularly multiservice.
摘要:
To selectively route stand-by packets in input modules (IMi) to destination output modules (OMj) via a switching matrix (1), distributed arbitration functions are executable by successive arbitration cycles. Each cycle comprises: a first phase executable by each input controller (ICi) to send each output controller (OCj) requests representative of the quantities of “required” stand-by packets, a second phase executable by each output controller (OCj) to determine the quantity of “admissible” packets depending on the requests. a third phase executable by a central arbitration unit (CSC) to determine “allowed aggregate” quantities depending on all the admissible quantities. a fourth phase executable by each input controller (ICi) to determine the allowed packet quantities depending on the admissible quantities and of the allowed aggregate quantities.
摘要:
To selectively route stand-by packets in input modules to destination output modules via a switching matrix, distributed arbitration functions are executable by successive arbitration cycles. Each cycle comprises: a first phase executable by each input controller to send each output controller requests representative of the quantities of required stand-by packets; a second phase executable by each output controller to determine the quantity of admissible packets depending on the requests; a third phase executable by a central arbitration unit to determine allowed aggregate quantities depending on all the admissible quantities; and a fourth phase executable by each input controller to determine the allowed packet quantities depending on the admissible quantities and of the allowed aggregate quantities.
摘要:
In order to switch selectively via a packets switching matrix waiting in the input modules (IMi) to address output modules, an arbitration function (CSC) selects by successive cycles, from all the pairs of input and output modules, separate subsets. Each cycle comprises p successive phases (x) associated respectively to p arbitration functions. Processing units (PUi) each execute the p functions, each function acting on three parameters termed “residual required quantity”, “input capacity” and “output capacity”, the values of which are related to a single pair and are set at the start of the cycle. Each phase consists of N successive steps (y) associated respectively to said subsets, each step being executed in parallel by the processing units (PUi) in order to calculate by means of the arbitration functions the “partial” accepted quantity values and to reset the parameters for the next step. Application to telecommunication networks, particularly multiservice.
摘要:
Equipment protection of a switch matrix (SM) in a network node, which contains a number of matrix modules (M1.1-M4.4, E1.5-E4.6) is achieved by slicing an input signal into k parallel signal slices (x(0)-x(3)) with k>2; coding the k signal slices into a number of n coded signal slices (x(0)-x(5)) with n>k+1 using an error correcting code to add redundancy to said input signal; switching said n coded signal slices through the switching matrix (SM) via n distinct matrix modules; and decoding the n coded signal slices into k decoded signal slices to correct errors introduced while passing through said switch matrix. Preferably, the switch matrix (SM) contains a first number of matrix boards (MB1-MB4, EB5, EB6), each carrying a second number of matrix modules (M1.1-M4.4, E1.5-E4.6). The n coded signal slices are switched via matrix modules on n distinct matrix boards.
摘要:
Circuits are provided that generate from an input signal one or more output clock signals having reduced skew. The input signal has transitions derived from the transitions of an original clock signal having a frequency that differs from the frequency of the output clock signal. The frequency of the output clock signal is a product from multiplying the frequency for the input signal and an integer ratio. The circuit includes an accumulator, a fractional phase detector, and a loop filter. The accumulator periodically adds a numerical offset value to a numerical phase value. The output clock signal is generated from this numerical phase value. The fractional phase detector generates from the numerical phase value a respective numerical phase error for each of the transitions of the input signal. The loop filter generates the numerical offset value from a filtering of the respective numerical phase errors.
摘要:
The present invention provides for a method and apparatus for carrying out connection and related input/output processing functions in a Sinchronous Digital Hierarchy (SDH/SONET) transport node (network), in which the payload switching matrices (e.g. MSPC and HPC matrices for an High Order VC system) collapse into one single functional block (MTRX), while the Virtual Container (VCs) monitoring functions (HVC_RX, HVC_TX) are shifted to the Input/Output position of the matrices.
摘要:
Circuits are provided that generate from an input signal one or more output clock signals having reduced skew. The input signal has transitions derived from the transitions of an original clock signal having a frequency that differs from the frequency of the output clock signal. The frequency of the output clock signal is a product from multiplying the frequency for the input signal and an integer ratio. The circuit includes an accumulator, a fractional phase detector, and a loop filter. The accumulator periodically adds a numerical offset value to a numerical phase value. The output clock signal is generated from this numerical phase value. The fractional phase detector generates from the numerical phase value a respective numerical phase error for each of the transitions of the input signal. The loop filter generates the numerical offset value from a filtering of the respective numerical phase errors.
摘要:
Disclosed is a method and erasure FEC decoder for correcting a pattern of errors by a two-dimensional decoding, the pattern of errors comprising at least two codewords in both a first and a second dimensions with a number of errors in common higher than the capacity of the code which is used for decoding. The method comprises the steps of: performing a full capacity decoding along the second dimension for removing possible false corrections introduced by a previous decoding performed along the first dimension; performing a reduced-capacity decoding along the first dimension, for identifying errored codewords along the first dimension; performing a full capacity decoding along the second dimension with disabled correction feature for identifying errored codewords along the second dimension; detecting the error coordinates from the information from steps b) and c); and correcting the detected pattern of errors.