摘要:
The present invention relates to a device able to receive packets circulating in a packet-switching network. The packets include information on a synchronization signal. The device is configured for producing first and second pulses synchronous with the synchronization signal. The first and second pulses have different periods, which are integer value multiples of the synchronization signal period.
摘要:
The present invention relates to the domain of video equipment. It concerns more specifically a transmission device able to transmit packets, said device comprising the means to extract image ticks from a synchronisation signal, the means to initialise an image counter from said image ticks, the means to initialise a CPT_PCR counter every “m” passage through zero of the image counter, CPT_PCR producing counting ramps CSE_PCR with a range M, the means to sample the counting ramps CSE_PCR every Tech period, where Tech is from a time base synchronised on all the stations of said network, and the means to transmit packets comprising a PCRe sample of the CSE_PCR counting ramp. According to the invention, it also comprises the means to insert in the packet:—an Num index identifying the CSE_PCR counting ramp from which the PCRe sample is realised, and—a time label Datejnit indicating a CSE_PCR counting ramp timestamp passage through a reference value PCR_REF comprised between 0 and M-1.
摘要:
The present invention relates to the domain of video equipment. In particular, the invention relates to a device able to receive packets in a network. The device comprises: means for receiving packets containing samples realized at a period, means for regenerating a ramp by means of a loop that delivers a clock, means for initializing, at every zero-crossing of the ramp, a counter whose rhythm is determined by the clock, means for generating image cues at every zero-crossing of the counter, and means for reconstituting a synchronization signal from said image cues, means for transmitting the synchronization signal to an item of remote equipment to be synchronized. According to the invention, the device comprises: means for receiving a return synchronization signal identical to the synchronization signal received by the equipment, means for extracting return image cues from the return synchronization signal, means for transmitting, to the loop, a sum between a sample and a sample of a signal delivered by the image counter, the samples having been realized at a rate set by the return image cues.
摘要:
A device is dedicated to assisting the reconstruction of synchronization signals, for example within an item of communication equipment of an IP network. This device comprises i) a phase-locked loop charged with reconstructing, on the basis of a second sampled ramp signal received, a reference clock signal and a second ramp signal identical to, and in phase with, that having been sampled, and ii) processing means charged with determining in a first sampled ramp signal received, representative of a synchronization signal to be reconstructed and each sample of which is associated with a sample of the second ramp signal corresponding to a determinable sampling period, the value which corresponds to the first sample of this first sampled ramp signal received as well as the sampling period corresponding to this value, and then to initialize with this value a synchronization counter which is synchronized with respect to the second reconstructed ramp signal, on the basis of the reconstructed reference clock signal.
摘要:
A device (D2) is dedicated to the reconstruction of clock signals, for example within communication equipment (EQ2) of an IP network. This device (D2) comprises i) a phase-locked loop (BV) having a cut-off frequency dependent, on the one hand, on a configuration value making it possible to reconstruct clock signals according to a chosen clock frequency, and on the other hand, a chosen sampling frequency, and ii) control means (MC2) responsible for forcing the phase-locked loop (BV) to present a variable cut-off frequency according to a received operating mode indication.
摘要:
A device (DA1) is intended to aid a clock synchronization device (DS1) of a master station (SM) of a wireless network in performing time synchronizations, this master station (SM) comprising a master clock (HM) represented by the value of a master counter (CM) and means (MG1) for generating wireless frames of IP packets containing in particular PTP messages of first and second types. The aid device (DA1) comprises detection means (MD1) for, in case of detection by the physical layer of the master station (SM) of a frame pulse received from the network, triggering the sampling of the value of the master counter (CM)
摘要:
A device for engaging and disengaging or throwing-off printing unit cylinders in a printing entity of a rotary printing press for printing a web of material, the printing entity including a lower and an upper printing unit, and one of the printing unit cylinders having a stationary mounting support in one of the printing units of the rotary printing press, includes a first adjusting unit for adjusting printing unit cylinders of the printing entity which are formed as printing form cylinders, and a second and eccentric adjusting unit for adjusting one of two of the printing unit cylinders of the printing entity which are formed as transfer cylinders, so that the printing unit cylinders of each of the lower and the upper printing units, respectively, are in mutual engagement, while the transfer cylinders of the respective lower and upper printing units are disengaged from one another.
摘要:
A device and a method for online storage, device and method for searching for similar content, a device and a method of transmission and a device and a method. Encrypted data is saved at a provider of online services. With the encrypted data, encrypted hashing data is saved with a public key and the content to save is encrypted with the encrypted hash. This advantageously enables data duplication at the online service provider to be prevented while preserving the private life of the users of the service. In order to search for content similar to reference multimedia data, fingerprints are also saved at the service provider. In order to limit the number of false positives returned, the fingerprint can further contain a search fingerprint, an encrypted selection fingerprint.
摘要:
A device (D2) is dedicated to the reconstruction of clock signals, for example within communication equipment (EQ2) of an IP network. This device (D2) comprises i) a phase-locked loop (BY) having a cut-off frequency dependent, on the one hand, on a configuration value making it possible to reconstruct clock signals according to a chosen clock frequency, and on the other hand, a chosen sampling frequency, and ii) control means (MC2) responsible for forcing the phase-locked loop (BV) to present a variable cut-off frequency according to a received operating mode indication.
摘要:
A device is operative to send packets in a packet communication network having at least two stations. According to an exemplary embodiment, the device operates by: extracting image pips on the basis of a synchronization signal; initializing a first counter on the basis of the the image pips; initializing a second counter according to zero-crossings of the first counter; sampling the second counter every period Tsmp, where Tsmp emanates from a time base synchronized on all the stations of the network; sending packets containing the samples of the second counter in the network; receiving at least one phase deviation value Δφ to be applied; and sending the at least one phase deviation value Δφ in the network. The present invention also pertains to a device operative to receive packets in a packet communication network having at least two stations.