Other

Alcatel Italia S.p.a.

Telettra Telefonia Elettronica E Radio Spa

Marco Fratti

Silvio Cucchi

Marco Mattiolo

The present invention relates to a method and to equipment for coding and decoding a sampled speech signal. It belongs to systems used in speech processing, in particular for compression of speech information. The method is based upon a time/frequency description and on a representation of the prototype as a fundamental period of a periodic waveform; moreover the excitation of the synthesis filter is carried out through a single, phase-adapted pulse.

Voiced speech coding and decoding using phase-adapted single excitation

A system for calculating the discrete cosine transform of dimension M*M which is orthogonal and separable under the form of two monodimensional transforms calculated by a fast algorithm, by operating on incoming and outgoing words, in the form of parallel bits, and by operating on the data internally in the system in words represented by 2M bits. The operations of addition and subtraction between variable data and the operations of multiplying by the variable data using fixed coefficients are made on the data represented in the form of M couples of serialized bits, so that the speed of the incoming and outgoing words, in the form of words of parallel bits, is equal to the speed of bit couples that represent the internal data. A circuit implemented onto a silicon base for implementation the fulfillment of this system includes at least: an input interface; a converter for incoming words for the conversion from the form of parallel bits to the form of words represented by serial bit couples for the incoming words and vice versa for the outgoing words; a first operator for the discrete cosine transform (DCT) monodimensional transform; a transpositor from lines to columns; a second operator for monodimensional transform; and a scaling device for outgoing words.

System and circuit for the calculation of the bidimensional discrete

The present invention relates to a casing with fixed and/or movable frames for doors, windows and the like, which has the peculiarity of comprising a self-supporting frame having a perimetral framework with a closed shape provided with sections of profiled elements having a central body defining, on opposite sides, abutment regions for the fixing of the perimetral region of two spaced apart pane-like elements which provide a double-glazing. The sections of profiled elements, in their central portion, external to the extension of the perimetral framework, have at least portions prearranged for the coupling of means for connecting to a fixed framework.

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Milan, Italy

Marco Fratti