Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Shinji Kawano

Futoshi Nakabe

Hiromi Ebara

Tadakatsu Masaki

Hideo Oozeki

Eiji Ueda

Toshitaka Hanaura

A semiconductor memory card that has a sufficient storage capacity when an EC application writes data to a storage is provided. A usage area for the EC application in an EEPROMin a TRMis expanded. The expansion is such that a partition generated in a flash memoryoutside the TRMis assigned to the EC application while a partition table is allocated in the internal EEPROM. Because the partition table is in the TRM, only a CPUin the TRMis able to access the generated partition table. Secrecy of stored contents increases because the access to the expanded area is limited to the CPUin the TRM

Semiconductor memory card, and program for controlling the same

A semiconductor memory card that has a sufficient storage capacity when an EC application writes data to a storage is provided. A usage area for the EC application in an EPPROMin a TRMis expanded. The expansion is such that a partition generated in a flash memoryoutside the TRMis assigned to the EC application while a partition table is allocated in the internal EEPROM. Because the partition table is in the TRM, only a CPUin the TRMis able to access the generated partition table. Secrecy of stored contents increases because the access to the expanded area is limited to the CPUin the TRM

A data distribution system is provided which generates outputs attribute data about multimedia data in advance and broadcasts the output attribute data together with the multimedia data so that the receiving terminal can grasp the outlines of the entire multimedia data and improve the visibility. A data broadcasting device () generates output attribute data about multimedia data in a data analyzing portion (). The output attribute data exists alone or is embedded in the multimedia data. The multimedia data and the output attribute data are encoded in a protocol encoder () and broadcast from a transmitter (). A receiving terminal device () receives the broadcast data in a tuner () and obtains the multimedia data and output attribute data in a tuner (). When a data display portion () displays the obtained multimedia data, the output attribute data is referred to and information related to the multimedia data is displayed together with the multimedia data. A data analyzing portion () analyzes the multimedia data and extracts the output attribute data embedded therein.

Broadcast data receiving device and method for receiving a plurality of multimedia data

The present invention provides a semiconductor memory card which no longer allows an illegal practice of acquiring contents of a deleted file. Here, when a deletion event is generated, a deletion handler gives a priority to a null-clear operation of a file entry and a FAT for a file to be deleted over a null-clear operation to other constituents of the file. A null-clear operation to a file entity of the file is distributed to a plurality of event handlers including the deletion handler.

Semiconductor memory card and computer readable program

The memory card with a simple configuration is provided with more reliable security. When the memory card receives the access request to the memory from the external connecting device, the access unit accesses the memory based on the access request. At this time, the switch composing the memory card indicates the propriety of the access right to the memory, and the access limitation unit limits that the access unit accesses the memory.

Memory card

A contactless integrated circuit (IC) card for providing a high-grade random number with a simple configuration. A plurality of provisional random numbers are generated according to a part of calculations to be used for generation of a random number. The plurality of provisional random numbers generated are stored. A random number is generated on the basis of one of the provisional random numbers selected in sequential order.

Contactless IC card, responding method, and program therefor

This invention provides a reader/writer, ID method and program comprising a response-detection unit of detecting normal responses and collisions from IC cards in response to a request; and a response-invalidation unit of sending a response-invalidation command, which is a command not to respond to requests in the future, to IC cards that sent normal responses when the response-detection unit received normal responses from IC cards even though collisions were detected.

IC card reader/writer, identification method and program

A reception display apparatus for receiving data blocks repeatedly transmitted from a broadcasting station at regular intervals and displaying a screen image based on the received data blocks. Each of the data blocks including a data section. Data to be displayed as the screen image is divided into a plurality of data sections. The reception display apparatus comprises: a reception means for receiving the data blocks; a data judgment means for judging whether the data section in each received data block is normal; a storage means for storing every data section judged as normal by the data judgment means without storing data sections judged as abnormal; a condition judgment means for judging, before all data sections to be displayed as the screen image are stored in the storage means, whether a condition for displaying the screen image is satisfied; and a display means for displaying, when the condition judgment means judges that the condition is satisfied, a part of the screen image using data sections currently stored in the storage means.

Reception display apparatus and method for displaying screen partially with certain timing even when all data for the screen has not been received, and computer-readable record medium recording such reception display program

The contactless IC card, the responding method, and the program that control the collision of response to the minimum, wherein the response judgment unit judges whether there is an initial response of the other contactless IC card at a specific time, and the response slot changing unit change the specific time based on the judgment result of the response judgment unit.

An IC card provided with a contact-type interface and a non-contact-type interface as the communication interface, and other electronic devices. The IC card identifies the kind of communication data communicated with an external device such as reader-writer, and decides on a communication interface that follows the identified communication data. Then, it is judged whether to switch the communication interface used communication for with the external device between the contact-type interface and the non-contact-type interface. And if it is decided to switch, the communication interface used for communication with the external device is switched.

IC card and electronic devices

A data broadcasting station transmits a multiplexed signal in which multimedia data encoded in a prescribed coding system are at least multiplexed in a broadcasting form. A file manager stores the multimedia data received by a tuner and decoded by a decoder in a storage device while creating management information therefor and registering it in a table. A browser requests of the file manager multimedia data to be referred to, and lets it be displayed on a monitor. The file manager increments/decrements a retention coefficient on the basis of a frequency of reference to the multimedia, and determines whether or not to delete each multimedia data stored in the storage device. Thus provided is a terminal device which can effectively utilize the capacity of the storage device without deleting multimedia data frequently referred to by the user.

Growing community of inventors

Hiroshima, Japan

Shinji Kawano