The invention relates to a device for demultiplexing coded data corresponding to multimedia objects. The data is organized in a bitstream divided into individually accessible portions--for instance Access Units for an MPEG-4 compliant bitstream--themselves subdivided into smaller data entities--SL-packets in the cited example--which all the demultiplexing operations are applied to. The operations are mainly, for all the data received at the input of the demultiplexing device: reading and formatt...

A universal method of trellis encoding signals mapped according to any signal constellation format involves constructing an encoder output table and a state transition table. The encoder output table defines the output symbol of an encoder given the input symbol and the present state of the encoder, while the state transition table defines the next state of the encoder given the present state of the encoder and the input applied to the encoder. The output table and the next state table are const...

An active transponder of an identification system comprises a memory for storing coded information and supplying it to a transmitter output, and data means independent of the memory for supplying further information to the output. The transponder has a battery and the data means can comprise detectors which detect when the voltage of the battery falls below respective predetermined levels. The data means can also comprise input connections arranged to receive signals representing the updated val...

The invention relates to a coded locking device actuated by successive pushes on two buttons. This device comprises means for converting the pushes on the two buttons into electrical pulses emitted respectively along two channels and an electronic unit adapted to identify the pulse trains successively emitted in the two channels, to count the numbers of pulses of the different successive trains, to compare each sequence of pulse trains with a memorized reference or code sequence and to emit an u...

A coded data output apparatus comprises an image data input or generation section, a resolution parameter specifying section, a resolution parameter modifying section and an image data output section. The image data input or generation section inputs or generates data for a dot code image to be printed. The resolution parameter specifying section specifies parameter data relating to the resolution of the image data input or generated by the image data input or generation section. The resolution ...

In a communication system receiving from a channel a received signal corresponding to a succession of received symbols during a corresponding succession of symbol times, the succession of symbols corresponding to a succession states of a code of the communication system, each of the states branching to a predetermined number of others of the states, the invention provides a process for deducing an estimate of the succession of symbols from the received signal by overlapped observations of the re...

In a modulation system for sending digital symbols over a band-limited channel in accordance with a sequence of multi-dimensional points each composed of a plurality of two-dimensional modulation signal points, and each selected from an available alphabet of the multi-dimensional points by an encoder on the basis of a group of the digital symbols, the improvement which includes circuitry for accumulating the symbols of each group, and circuitry for thereafter selecting the multi-dimensional poin...

A system for processing coded information is disclosed. A receiver receives coded information from a source. The receiver is equipped with a decoder and a real time clock. The coded information is decoded only when the time signal from the real time clock is within a given time interval. The coded information contains a source time signal and a time interval signal. A means for comparing the source time signal with the real time signal determines if the real time is within the time interval, and...

Disclosed is a scrambler/encryption system for randomizing an information-containing data signal for transmission and for reproducing the original information at a receiver. The information-containing data to be transmitted, encoded with a preselected base of a numeric system, is applied to a modulo adder appropriate for that base. An output of the modulo adder is applied as an input to a multistage shift register. An arbitrary logic networ, having a plurality of inputs, connected to a plurality...

A coded font keyboard design is presented wherein conventional keyboard formats, such as the qwerty keyboard, are coded to produce instructional materials for developmental language education using the periodic code of language elements. A preferred embodiment describes the use of the qwerty keyboard to product all coded symbols used in the periodic table of language elements.