Abstract: A system and method in a radio frequency identification (RFID) tag for writing and erasing user memory. A write command is received at the tag to write data into user memory of the tag. Based on receipt of the write command, a user memory flag in a first memory bank of the tag is set, and the data is written into a second memory bank of the tag. An erase command is received at the tag to erase data stored in the user memory of the tag. Based on receipt of the command to erase, the user memory flag in the first memory bank is cleared, and data stored in the second memory bank is erased.

Abstract: Methods and systems for optimizing storage of data items in a memory of an radio frequency identification tag (RFID) are provided. The data structure for optimized storage includes a packed object having a length section including an indication of a number of identifiers in the packed object, an identifier section including a directory of indices representing an identifier for each data item contained within the packed object and a data section encoding a data portion associated with each data item included in the data section.

Abstract: Systems and methods for optimizing random access retrieval of a requested data item in a radio frequency identification (RFID) tag are provided. During random access retrieval, a first read of a memory bank in the RFID tag is performed. The first read providers a set of identifier indices stored in a packed object in the memory bank of the RFID tag and a length of the packed object. A determination is then made whether a retrieved identifier index represents the requested data item to be retrieved. A second read of the memory bank, accessing the portion of the memory bank including the data items, is then performed. The location of the data item in the packed object may optionally be determined prior to the second read.

Abstract: A system and method for encoding scanner signal strength and timing information provided, possibly on multiple signal lines, from a digitizer circuit into a signal that can be transmitted on a single line to a modified decoder. A multiplexing device multiplexes the multiple signals, which can be multi-bit or dual-DBP signals, into a single signal.

Abstract: An optical code reader system is provided for reading a presented optical code having first and second sets of elements, the first set of elements including a plurality of elements having a first reflective property and the second set of elements including a plurality of elements having a second reflective property. The system includes a photo sensor module which senses incident light reflected from the presented optical code and generates electrical signals corresponding to the sensing. The system further includes a software decoder module executable on a processor for uncompensating the presented optical code by adjusting a relative measured dimension of individual elements of the first set of elements in accordance with a predetermined adjustment factor for uncompensating the first set of elements without uncompensating the second set of elements for generating an uncompensated optical code.

Abstract: Methods, systems, and apparatuses for obtaining data from radio frequency identification (RFID) tags are described. A read of data stored in a RFID tag is initiated. It is determined that the read failed. A machine readable symbol of the RFID tag is scanned to identify the RFID tag. The read and scan can be performed by a multi-mode reader device or by separate devices. In an aspect, a portion of the scanning operation can be performed before it is determined that the read failed. In a further aspect, a reversible obscuration partially or entirely prevents decoding of the machine readable symbol. The obscuration is reversed to expose the machine readable symbol prior to scanning the machine readable symbol. An indication can be provided on the RFID tag to indicate to an operator that the machine readable symbol is present.

Abstract: Described are a system and method for verifying a self-authenticating document. First, upon a request for verification of the document, a characteristic digital data “CDD” is extracted from the document. An image of at least a predetermined portion of the document is obtained. The image is divided into a predetermined number of pixel groups and each pixel group includes a plurality of pixels. Pixel characteristic data is determined for each pixel. A pixel group classification data is determined for each pixel group as a function of the pixel characteristics data of at least one pixel in the pixel group. A further CDD for the image is generated as a function of the pixel group classification data and a location of the corresponding pixel group in the image. The document is verified if the CDD is substantially identical to the further CDD.

Abstract: Described are a system and method for verifying a self-authenticating document. First, an image is obtained of at least a predetermined portion of the document. Then, the image is divided into a predetermined number of pixel groups, each pixel group including a plurality of pixels and pixel characteristic data for each pixel is determined. A pixel group classification data for each pixel group is determined as a function of the pixel characteristics data. Based on the pixel group classification data and a location of the corresponding pixel group in the image, a characteristic digital data “CDD” for the image is generated. The CDD is added to the document. Upon a request for verification of the document, the CDD is extracted from the document. Then, a further CDD based on the image is generated. The document is verified only if the CDD is substantially identical to the further CDD.

Abstract: Methods, systems, and apparatuses for RFID tags, RFID readers, communications algorithms, and RFID-related applications are described herein. In an aspect of the invention, an RFID tag is capable of storing data, receiving a signal from a reader, determining a response taking into account the tag mode and the data, and transmitting a response to the reader. The data includes a first plurality of bits and a second plurality of bits. The tag mode may be set by a current or a prior command by the reader. Depending on the tag mode, the response may be complete, or the second plurality of bits may be truncated, compressed, or encrypted. In an aspect of the invention, the response includes an implicit indication of whether the response is complete, truncated, encrypted, or compressed. In another aspect of the invention, a command from the reader indicates how many bits should be truncated, compressed, or encrypted.

Abstract: Methods, systems, and apparatuses for reconstitution of data for failed radio frequency identification (RFID) tags are described. The tag's information is segmented, optionally compressed, and encoded into a plurality of optical representations. Alternatively, or in addition, a portion or all of the tag's information is stored in a non-optical format. Upon failure of a tag read for any reason (e.g., tag failure, reader failure, operator error, environmental reasons, etc.), the data is reconstituted from the optical representations. Alternatively, or in addition, the reconstitution includes incorporating the information stored in a non-optical format.

Abstract: Methods, systems, and apparatuses for obtaining data from radio frequency identification (RFID) tags are described. A read of data stored in a RFID tag is initiated. It is determined that the read failed. A machine readable symbol of the RFID tag is scanned to identify the RFID tag. The read and scan can be performed by a multi-mode reader device or by separate devices. In an aspect, a portion of the scanning operation can be performed before it is determined that the read failed. In a further aspect, a reversible obscuration partially or entirely prevents decoding of the machine readable symbol. The obscuration is reversed to expose the machine readable symbol prior to scanning the machine readable symbol. An indication can be provided on the RFID tag to indicate to an operator that the machine readable symbol is present.

Abstract: A system and method for processing scanner signals by storing both a standard digitizer signal and a more detailed digitizer signal for decoding. The decoder can then use the standard digitizer signal by default and in those cases when the bar code pattern cannot be decoded using the standard digitizer signal the decoder may access the more detailed digitizer signal.

Abstract: A system and method for encoding scanner signal strength and timing information provided, possibly on multiple signal lines, from a digitizer circuit into a signal that can be transmitted on a single line to a modified decoder. A multiplexing device multiplexes the multiple signals, which can be multi-bit or dual-DBP signals, into a single signal.

Abstract: Described is a method and system for providing a user with a personalized shipment system. The user is registered by providing user data which is associated with a unique user identifier. Label data is generated for each of a plurality of labels. Each label includes a unique label identifier in a machine language. The label identifier is associated with the user identifier in a computer database. An item to be shipped is received; the item includes one of the labels and recipient data which includes a destination data of the item. Determination is made whether the destination data is in a machine language. When the destination data is not in a machine language, the destination data is translated into machine language destination data. The unique label identifier and the machine language destination data are obtained from the item using a machine capable of reading the machine language during the shipment of the item.

Abstract: An optical code reader system is provided for reading a presented optical code having first and second sets of elements, the first set of elements including a plurality of elements having a first reflective property and the second set of elements including a plurality of elements having a second reflective property. The system includes a photo sensor module which senses incident light reflected from the presented optical code and generates electrical signals corresponding to the sensing. The system further includes a software decoder module executable on a processor for uncompensating the presented optical code by adjusting a relative measured dimension of individual elements of the first set of elements in accordance with a predetermined adjustment factor for uncompensating the first set of elements without uncompensating the second set of elements for generating an uncompensated optical code.

Abstract: A method for producing an ink-spread compensated variant of an existing optical code encodation scheme, wherein the existing encodation scheme has printed areas and spaces having a length in at least one dimension being a function of a given unit length for encoding information. In the method, the pattern of printed areas and spaces for a given data input is determined and a given length is added to the length of each space while the length of the printed areas remains unchanged to enlarge the overall length of the resulting code symbol in the at least one dimension.

Abstract: A method for producing an ink-spread compensated variant of an existing optical code encodation scheme, wherein the existing encodation scheme has printed areas and spaces having a length in at least one dimension being a function of a given unit length for encoding information. In the method, the pattern of printed areas and spaces for a given data input is determined and a given length is added to the length of each space while the length of the printed areas remains unchanged to enlarge the overall length of the resulting code symbol in the at least one dimension.

Abstract: A method for producing an ink-spread compensated variant of an existing optical code encodation scheme, wherein the existing encodation scheme has printed areas and spaces having a length in at least one dimension being a function of a given unit length for encoding information. In the method, the pattern of printed areas and spaces for a given data input is determined and a given length is added to the length of each space while the length of the printed areas remains unchanged to enlarge the overall length of the resulting code symbol in the at least one dimension.

Abstract: A method for producing an ink-spread compensated variant of an existing optical code encodation scheme, wherein the existing encodation scheme has printed areas and spaces having a length in at least one dimension being a function of a given unit length for encoding information. In the method, the pattern of printed areas and spaces for a given data input is determined and a given length is added to the length of each space while the length of the printed areas remains unchanged to enlarge the overall length of the resulting code symbol in the at least one dimension.

Abstract: A bar code symbology derived from form a set of patterns of bar and spaces in which each character spans a distance of m module widths and is represented by n bars and p interleaved spaces; and the largest single bar or space is limited to k modules in width, having a predetermined start pattern; a predetermined stop pattern; and providing the exclusion from the set of valid patterns those patterns such that the predetermined start pattern is only at one end of a valid symbol, and the predetermined stop pattern is only at the other end of a valid symbol.