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    Process and device for reducing bus switching activity and computer program product therefor
    1.
    发明公开
    Process and device for reducing bus switching activity and computer program product therefor 有权
    Verfahren undGerätzur Verminderung derBusschaltaktivitätund Rechnerprogrammprodukt

    公开(公告)号：EP1380961A1

    公开(公告)日：2004-01-14

    申请号：EP02425456.7

    申请日：2002-07-10

    Applicant: STMicroelectronics S.r.l.

    Inventor： Visalli, Giuseppe ,  Pappalardo, Francesco

    IPC: G06F13/42

    CPC classification number: G06F13/4239

    Abstract: A process for transmitting data on a bus, minimizing the switching activity, involves converting the data between a first format (b(t)) and a second format (B(t)) used for transmission of the data. The conversion between said first format (b(t)) and said second format (B(t)) entails the swapping of position of respective bits within a cluster comprising a given number of bits, the swap operation being implementable according to different variants, the maximum number of said variants being equal to the factorial of the aforesaid given number. Each of said variants is identified by a respective pattern (P t ). Among the aforesaid patterns, an optimal pattern is selected which minimizes the switching activity (SA) at the moment of transmission of data on the bus. The data are then transmitted on the bus using the second format (B(t)) generated using said optimal pattern.

    Abstract translation: 一种用于在总线上传送数据，使切换活动最小化的过程涉及在用于传输数据的第一格式（b（t））和第二格式（B（t））之间转换数据。 所述第一格式（b（t））和所述第二格式（B（t））之间的转换需要在包括给定位数的簇内的各个比特的位置的交换，所述交换操作可根据不同的变型实现， 所述变体的最大数量等于上述给定数量的阶乘。 每个所述变体由相应的图案（Pt）标识。 在上述模式中，选择在总线上传输数据时切换活动（SA）最小化的最佳模式。 然后使用使用所述最佳模式生成的第二格式（B（t））在总线上传送数据。

    Method for aggregating and transmitting sensor signals
    4.
    发明公开
    Method for aggregating and transmitting sensor signals 有权
    Verfahren zur Zusammensetzung und zum Senden von Sensorsignalen

    公开(公告)号：EP1845660A1

    公开(公告)日：2007-10-17

    申请号：EP06425259.6

    申请日：2006-04-12

    Applicant: STMicroelectronics S.r.l.

    Inventor： Visalli, Giuseppe ,  Pappalardo, Francesco

    IPC: H04L12/28

    CPC classification number: H04L12/2856

    Abstract: Processing method for forming an aggregate signal (y beam ) from a plurality of starting signals (x 1 , ... ,x 5 ), the method comprising the steps of:
    - acquiring said starting signals (x 1 , ... ,x 5 ) through respective sensors of a homogeneous sensors group (U 1 , ... ,U 5 );
    - converting acquired signals in respective digital signals (x 1 , ... ,x 5 ) having data represented with a predetermined bits number;
    - processing the digital signals (x 1 , ... ,x 5 ) to form aggregate signal (y beam ).
    The processing step comprises the operations of:
    - modifying digital signals (x 1 , ... ,x 5 ) changing the data format of each such digital signals from a first format to a second format, each data in the second format having been obtained from a respective data in the first format through an operation of permuting the bits position according to a permutation scheme (p 1 , ... ,p 5 ) associated with said data and to the specific digital signal comprising that data;
    - forming aggregate signal (y beam ) obtaining said aggregate signal data by means of a bitwise logic operator acting upon said modified digital signal respective data.

    Abstract translation: 用于从多个起始信号（x 1，...，x 5）形成聚合信号（y波束）的处理方法，所述方法包括以下步骤： - 获取所述起始信号（x 1，...，x 5）通过均质传感器组（U 1，...，U 5）的各个传感器; - 转换具有以预定位数表示的数据的各个数字信号（x 1，...，x 5）中的采集信号; - 处理数字信号（x 1，...，x 5）以形成聚合信号（y波束）。 处理步骤包括以下操作： - 修改将每个这样的数字信号的数据格式从第一格式改变为第二格式的数字信号（x 1，...，x 5），获得第二格式的每个数据 根据与所述数据相关联的置换方案（p 1，...，p 5）以及包括该数据的特定数字信号，通过根据第一格式的相应数据进行比特排列的操作; - 通过对所述修改的数字信号相应数据作用的按位逻辑运算器形成聚合信号（y波束）获得所述聚合信号数据。

    Method and device for transmitting data on a sigle line, in particular for transmitting data on a bus with minimization of the bus switching activity,and corresponding computer product
    5.
    发明公开
    Method and device for transmitting data on a sigle line, in particular for transmitting data on a bus with minimization of the bus switching activity,and corresponding computer product 有权
    为通过最小化总线数据通过单个线路传输数据，特别是方法和设备将要发送Busschaltaktivität

    公开(公告)号：EP1439470A1

    公开(公告)日：2004-07-21

    申请号：EP03425013.4

    申请日：2003-01-14

    Applicant: STMicroelectronics S.r.l.

    Inventor： Pappalardo, Francesco ,  Visalli, Giuseppe

    IPC: G06F13/42

    CPC classification number: G06F13/4286

    Abstract: Described herein is a method for transmitting data on a bus with minimization of the bus switching activity, comprising the steps of converting the datum to be transmitted from its own original format to a transmission format that minimizes the switching activity on the bus, said conversion consisting in swapping the position of one or more bits of the datum to be transmitted, the swapping being performable according to a plurality of different variants, each of which is identified by a respective sorting pattern, and selecting, between the various sorting patterns, an optimal sorting pattern that minimizes the bus switching activity upon transmission on the bus of the datum generated using said optimal sorting pattern.

    Abstract translation: 在描述了一种用于在总线上传输数据与总线开关活动的最小化，包括将日期为从它自己的原始格式的传输格式反式mitted以下步骤的方法也最大限度地减少了总线上的开关活动，所述转换由......组成 最佳地在交换的日期的一个或多个比特的位置是反式mitted，对换是可执行的雅丁不同的变型的复数，每个的所有被鉴定通过respectivement分拣模式，并且选择，各种排序图案之间，以 分拣模式并最大限度地减少使用所述最佳排序模式中产生的时间的总线上在发送时总线开关活动。

    A method of transmitting data streams on optical links, system and computer program product therefor
    7.
    发明公开
    A method of transmitting data streams on optical links, system and computer program product therefor 有权
    一种用于传输数据流的方法通过光链路，系统和计算机程序产品

    公开(公告)号：EP1475906A1

    公开(公告)日：2004-11-10

    申请号：EP03010238.8

    申请日：2003-05-07

    Applicant: STMicroelectronics S.r.l.

    Inventor： Pappalardo, Francesco ,  Visalli, Giuseppe

    IPC: H04B10/155 ,  H04L25/49

    CPC classification number: H04L25/4908 ,  H04B10/524

    Abstract: A data stream (b(t)) including high ("1") and low ("0") logical states is transmitted over an optical link (16) by means of an optical source (15) adapted to be driven (14) via said the data stream to generate an optical signal for transmission over the optical link (16). The optical signal includes optical pulses generated at the occurrence of high logical ("1") states in said data stream (b(t)). The input data stream (b(t)) is coded (2000) into a coded data stream (B(t)) prior to the transmission over the optical link (16). The coding step minimises the logical high states ("1") in the coded data stream (B(t)), and the optical source (15) is driven by means of the coded data stream (B(t)) wherein the number of logical high states ("1") has been minimised.

    Abstract translation: 的数据流（B（t））的包括高（“1”）和低（“0”）的逻辑状态是反式mitted到由光学源的手段光链路（16）被驱动（15）angepasst（14） 通过所述数据流以生成用于传输在光链路（16）的光信号。 该光信号包括在高逻辑（“1”）状态的在所述数据流的发生（B（t））的生成的光脉冲。 输入数据流（B（t））的进行编码（2000）成编码数据流（B（t））的之前的传输在光链路（16）。 所述编码步骤最小化编码的数据流（B（t））的，和光源（15）中的逻辑高状态（“1”）由所述编码数据流的手段（B（t））的驱动worin数 逻辑高状态（“1”）已经被最小化。

    Floating-point multiplication
    8.
    发明公开
    Floating-point multiplication 审中-公开
    Gleitkommamultiplizierung

    公开(公告)号：EP1429239A2

    公开(公告)日：2004-06-16

    申请号：EP03027629.9

    申请日：2003-12-02

    Applicant: STMicroelectronics S.r.l.

    Inventor： Pappalardo, Francesco ,  Visalli, Giuseppe

    IPC: G06F7/52 ,  G06F7/48

    CPC classification number: G06F7/4876 ,  G06F7/483 ,  G06F7/49936 ,  G06F7/49947

    Abstract: In a method for multiplication of floating-point real numbers (f, FN), encoded in a binary way in sign (SGN, SN), exponent (E, EN) and mantissa (M; MN), the multiplication of the mantissa (M; MN) envisages a step of calculation of partial products, which are constituted by a set of addenda (P) corresponding to said mantissa (MN). In order to reduce the size and power consumption of the circuits designed for calculation, there is adopted a method of binary encoding which envisages setting the first bit of the mantissa (MN) to a value 1, in order to obtain a mantissa (MN) having a value comprised between 0.5 and 1.
    Also proposed are methods for rounding of the product and circuits for the implementation of the multiplication method. Also illustrated are circuits for conversion from and to encoding of floating-point real numbers according to the IEEE754 standard.
    Preferential application is in portable and/or wireless electronic devices, such as mobile telephones and PDAs, with low power-consumption requirements.

    Abstract translation: 在以二进制方式编码的符号（SGN，SN），指数（E，EN）和尾数（M; MN）的浮点实数（f，FN）的乘法方法中，尾数（ M; MN）设想了由对应于所述尾数（MN）的一组附加（P）构成的部分乘积的计算步骤。 为了减小设计用于计算的电路的尺寸和功耗，采用了一种二进制编码方法，其设想将尾数（MN）的第一比特设置为值1，以获得尾数（MN） 具有包括在0.5和1之间的值。还提出了用于实现乘法的乘积和电路的舍入的方法。 还示出了根据IEEE754标准从浮点实数转换和编码的电路。 优先应用于便携式和/或无线电子设备，例如移动电话和PDA，具有低功耗要求。

    Method and system for high-speed floating-point operations and related computer program product
    9.
    发明公开
    Method and system for high-speed floating-point operations and related computer program product 审中-公开
    方法和高速浮点运算系统和相关计算机程序产品

    公开(公告)号：EP1752872A3

    公开(公告)日：2008-06-25

    申请号：EP06116753.2

    申请日：2006-07-06

    Applicant: STMicroelectronics S.r.l.

    Inventor： Visalli, Giuseppe ,  Pappalardo, Francesco

    IPC: G06F7/74 ,  G06F7/485

    CPC classification number: G06F7/74 ,  G06F7/485

    Abstract: A circuit for estimating propagated carries in an adder starting from operands that include actual addition inputs or at least one earlier carry, the circuit performs statistical circuit operations with independent binary traffic for the operands. Preferably, this binary traffic is independent and equiprobable or quasi-equiprobable binary traffic, and the adder is a leading zero anticipatory logic integer adder producing a number having the same number of leading zeroes as the result of the integer addition performed. The carry value may be produced from a logic function (e.g., Karnaugh Map, Quine-McClusky) of the operands, as a logic combination of the operands covering all the 1s in the logic function.

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