Abstract: A lighting device arranged to be controlled via a wireless controller, wherein said lighting device comprises a light emitting load arranged for emitting light, a driver arranged for receiving a supply voltage and for driving said light emitting load based on said received supply voltage, an auxiliary supply arranged for supplying an auxiliary Direct Current, DC, supply voltage, a wireless receiver, connected to and powered by said auxiliary supply, arranged for wirelessly receiving, from said wireless controller, a control signal, and for activating said driver based on said received control signal, wherein said wireless receiver is arranged to operate according to a pulsed listen mode, said pulsed listen mode comprising active phases in which said wireless receiver is able to receive said control signal and non-active phases in which said wireless receiver is not able to receive said control signal.

Abstract: In a wireless mesh network, a battery operated node can select a parent node via which messages are routed to further nodes. The parent node can initially be selected based on signal strength. The node receives acknowledgements for messages sent, if they arrive. The node calculates a reliability indicator of the parent node based on the number of messages for which an acknowledgement has been received. If the reliability indicator exceeds a predetermined threshold the node selects a new parent node, based on second selection criteria. For example, the node with the next greatest signal strength.

Abstract: An analogue dimmer driver for driving an LED lighting element (54) to generate coded light comprises an output component (54) which provides a primary current (ipr), a capacitor (53) connected to the output component, a switch (S1) via which the lighting element is connectable to the current source in parallel with the capacitor. Switching is performed by periodically opening and closing the switch to code information into light generated by the lighting element. The output component has an input configured to receive a dimming signal. Responsive to a change in the dimming signal: i) the primary current is increased so as to increase the average power of the generated light and ii) the duty cycle of the switching is increased by an amount sufficient to prevent the peak level of the current though the lighting element when the switch is closed (ipr+idis) from exceeding a predetermined level (inom).

Abstract: A lighting device arranged to be controlled via a wireless controller, wherein said lighting device comprises a light emitting load arranged for emitting light, a driver arranged for receiving a supply voltage and for driving said light emitting load based on said received supply voltage, an auxiliary supply arranged for supplying an auxiliary Direct Current, DC, supply voltage, a wireless receiver, connected to and powered by said auxiliary supply, arranged for wirelessly receiving, from said wireless controller, a control signal, and for activating said driver based on said received control signal, wherein said wireless receiver is arranged to operate according to a pulsed listen mode, said pulsed listen mode comprising active phases in which said wireless receiver is able to receive said control signal and non- active phases in which said wireless receiver is not able to receive said control signal.

Abstract: In a wireless mesh network, a battery operated node can select a parent node via which messages are routed to further nodes. The parent node can initially be selected based on signal strength. The node receives acknowledgements for messages sent, if they arrive. The node calculates a reliability indicator of the parent node based on the number of messages for which an acknowledgement has been received. If the reliability indicator exceeds a predetermined threshold the node selects a new parent node, based on second selection criteria. For example, the node with the next greatest signal strength.

Abstract: An analogue dimmer driver for driving an LED lighting element (54) to generate coded light comprises an output component (54) which provides a primary current (ipr), a capacitor (53) connected to the output component, a switch (S1) via which the lighting element is connectable to the current source in parallel with the capacitor. Switching is performed by periodically opening and closing the switch to code information into light generated by the lighting element. The output component has an input configured to receive a dimming signal. Responsive to a change in the dimming signal: i) the primary current is increased so as to increase the average power of the generated light and ii) the duty cycle of the switching is increased by an amount sufficient to prevent the peak level of the current though the lighting element when the switch is closed (ipr+idis) from exceeding a predetermined level (inom).

Abstract: A method of encoding user data into codevectors of an error correcting code, includes generating a first block of data symbols including user data symbols and dummy data symbols; encoding the first block using an ECC encoder to obtain a codeword comprising the first block of data symbols and a second block of parity symbols; and generating a codevector by selecting a user data portion of the user data symbols from the first block and a parity portion of the parity symbols from the second block. The sum of a number of the user data portion and a number of the parity portion is smaller than the sum of a number of the user data symbols and a number of the parity symbols of the second block.

Abstract: A method of encoding user data into codevectors of an error correcting code, includes generating a first block of data symbols including user data symbols and dummy data symbols; encoding the first block using an ECC encoder to obtain a codeword comprising the first block of data symbols and a second block of parity symbols; and generating a codevector by selecting a user data portion of the user data symbols from the first block and a parity portion of the parity symbols from the second block. The sum of a number of the user data portion and a number of the parity portion is smaller than the sum of a number of the user data symbols and a number of the parity symbols of the second block.

Abstract: A method of encoding user data into codevectors of an error correcting code, includes generating a first block of data symbols including user data symbols and dummy data symbols; encoding the first block using an ECC encoder to obtain a codeword comprising the first block of data symbols and a second block of parity symbols; and generating a codevector by selecting a user data portion of the user data symbols from the first block and a parity portion of the parity symbols from the second block. The sum of a number of the user data portion and a number of the parity portion is smaller than the sum of a number of the user data symbols and a number of the parity symbols of the second block.

Abstract: An information carrier for holding user information, the information carrier comprising access information in the form of access information bits for accessing the user information, the access information bits being stored on the information carrier in a variation of a parameter, which variation is detectable by integration detection. The access information bits are scrambled according to a pre-determined scrambling method. By scrambling the access information bits according to a pre-determined scrambling method, detection of the access information is not possible as long as the scrambling method is not known. Using the integration detection technique, the only way to obtain the access information is by knowing how the signal obtained after reading-out the area comprising the access information bits must be processed. In this way illegal retrieval of the user information is further prevented.

Abstract: The invention relates to a method of encoding user data into codevectors and to a corresponding method of decoding codevectors into user data.

Abstract: An information carrier for holding user information includes access information for accessing the user information, the access information being stored in a pre-determined first region on the information carrier. The information carrier further includes at least one further region different from the first region, the further region comprising dummy information.

Abstract: An information carrier for holding user information includes access information for accessing the user information, the access information being stored in a pre-determined first region on the information carrier. The information carrier further includes at least one further region different from the first region, the further region comprising dummy information.

Abstract: An information carrier for holding user information includes access information for accessing the user information, the access information being stored in a pre-determined first region on the information carrier. The information carrier further includes at least one further region different from the first region, the further region comprising dummy information.

Abstract: The invention relates to an information carrier for holding user information, the information carrier comprising access information for accessing the user information, the access information being stored in a pre-determined first region on the information carrier. The information carrier further comprises at least one further region different from the first region, the further region comprising dummy information. The invention is based on the insight that the noise level of a read out signal increases somewhat in the region(s) where the access information is hidden. To avoid this difference in noise level between regions with and without the access information, this access information is assigned for only a specific region of the information carrier, but dummy information is also written in other regions. Due to this, an improved copy protection system against illegal read out of the user information present or to be present on the information carrier is realized.

Abstract: An information carrier for holding user information includes access information for accessing the user information, the access information being stored in a pre-determined first region on the information carrier. The information carrier further includes at least one further region different from the first region, the further region comprising dummy information.

Abstract: The invention relates to a method of encoding user data into codevectors and to a corresponding method of decoding codevectors into user data.

Abstract: A first block of data symbols is generated by arranging a predetermined number of user data symbols and a predetermined number of dummy data symbols in a predetermined order. The first block of data symbols is encoded using an ECC encoder to obtain a codeword having a predetermined number of symbols, the codeword comprising the first block of data symbols and a second block of parity symbols. Then a codevector is generated containing less then all the user data symbols and parity symbols from the codeword. The codevector can be stored or transmitted. The codevector may be decoded by generating a codeword comprising dummy data symbols, the codevector, and filling symbols, arranged in a predetermined order. Then decoding the codeword using an ECC decoder to obtain the user data symbols.

Abstract: A portable storage device (MC) is disclosed, which comprises a memory (MEM) for storing data (DAT), a data interface (INT) for exchanging data (DAT) between the memory (MEM) and a host device (DEV), radio communication interface (RI) designed for receiving a key (K) from a transponder (T), checking means (COMP) for checking if a key (K) has a predefined value (V, and access inhibit means (SW) for controlling access to the memory (MEM), wherein the access inhibit means (SW) are controlled by the checking means (COMP). Access to the memory (MEM) is only granted if a certain key (K) can be received, which means that a certain transponder (T) has to be in the vicinity of the portable storage device (MC) for granting access. Furthermore, data (DAT) which is transferred from host device (DEV) to memory (MEM) can be encrypted and data (DAT) which is transferred from memory (MEM) to host device (DEV) can be decrypted. In this way for example commonly used memory cards can be secured against unauthorized use.

Abstract: User data may be encoded into codevectors as follows. A first block of data symbols is generated by arranging a predetermined number of user data symbols and a predetermined number of dummy data symbols in a predetermined order. The first block of data symbols is encoded using an ECC encoder to obtain a codeword having a predetermined number of symbols, the codeword comprising the first block of data symbols and a second block of parity symbols. Then a codevector is generated containing less then all the user data symbols and parity symbols from the codeword. The codevector can be stored or transmitted. The codevector may be decoded by generating a codeword comprising dummy data symbols, a codevector, and filling symbols, arranged in a predetermined order. Then decoding the codeword using an ECC decoder to obtain the user data symbols.