摘要:
In a packet switched communications system an incoming real-time packet is imbedded after the next block of data of the non-real-time packet being transmitted. This object is accomplished by transmitting each packet along with at least a 1-byte trailer which is used to indicate the packet type, whether the current block of non real time data is preempted or whether the current block of non real time data is resumed.
摘要:
The present invention relates to the field of information processing by digital computers, and more particularly to a method and system, in an electronic spreadsheet, for handling user-defined options during a copy/cut - paste operation when the source range of cells comprises one or a plurality of cells with user-defined options and when the destination environment does not necessarily defines the same user-defined options as the ones defined in the source environment. The method of handling user-defined options during a copy and paste or a cut and paste operation comprises the steps of:
defining one or a plurality of combinations, each combination comprising one or a plurality of options; defining a source cell range and a destination cell range; defining an operation to execute, either copy and paste, or cut and paste; for each defined option combination comprising one or a plurality of options, if at least one cell in the source cell range comprises a reference to said one or plurality of options,
computing the content of each cell within the source cell range according to said one or plurality of options; creating a version instance of the destination cell range; copying the source range of cells into said version instance. when the last option combination is copied,
clearing the source cell range if the operation is cut and paste.
摘要:
A high performance data packet buffering method and a programmable data communication adapter for high speed packet transmission networks are disclosed. The line adapter includes programmable processing means, for receiving and transmitting data packets of fixed or variable length. This system is characterized in that it comprises
· means for buffering (132) said data packets, · means for identifying said buffering means and said data packets in said buffering means, · means for queueing (Figure 15) in storing means (131) said identifying means in a single instruction, · means for dequeueing (Figure 16) from said storing (131) means said identifying means in another single instruction , · means for releasing said buffering means, Each instruction comprises up to three operations executed in parallel by said processing means :
· an arithmetical and logical (ALU) operation on said identifying means, · a memory operation on said storing means, and · a sequence operation.
摘要:
Digital filter used in a sigma-delta decoder wherein each input sample is involved in the computation of three consecutive PCM output samples. During one sigma-delta sampling period, the filter performs three parallel operations by multiplexing (44) one adder (36) running three times faster than the sigma-delta clock for loading one of three accumulators (38, 40, 42). As the analog-to-digital converter must be kept in phase with remote modem transmit clock, the PCM sampling clock is controlled by the phase tracking performed by adding or subtracting one period of the crystal oscillator from time to time to the PCM sampling clock period. Rotating the order the accumulators are loaded by the adder each PCM sampling time enables to have zero as last coefficient value to add to the accumulator the contents of which is used as PCM output samples. Thus, each PCM sample value is available in the corresponding accumulator one sigma-delta clock period before the last computation. In case of a correction which shortens or lengthens the PCM sampling period, this correction does not change the PCM sample value to be output since the last computation which is either cancelled or repeated, consists in adding zero to the previous accumulator contents.
摘要:
Le spectre du signal vocal constitué initialement par des échantillons S n codés à 12 bits, apparaissant à une fréquence de 8 KHz est scindé en deux bandes. L'une sert à engendrer (en CALC) des coefficients K i dits d'auto- corrélation partielle fournissant après quantification (en QA2) une information COEF, l'autre, la plus basse, est d'une part, scindée (en LPFD et SBC) en sous-bandes quantifiées avec un réglage dynamique du taux de bit affecté à chaque sous-bande de manière à fournir une information dite SIGNAL, et d'autre part utilisée (en EN et OA1) pour une mesure d'énergie de bande haute fournissant une information ENERG. Les données ENERG, SIGNAL et COEF caractérisent le signal vocal recodé. Elles peuvent être multiplexées (par MPX) sur une même voie de transmission.