A system and method for storing, retrieving displaying, printing and otherwise manipulating color images stored in a central "host" computer from a realtor's remote data terminal includes a host computer which stores and maintains a database containing listings of real estate properties on the market. The host computer also optionally can store image information relating to specific properties. Images can be loaded from remote terminals over telephone lines to the host system on an interactive basis. Images can then be retrieved from the host system, also on an interactive basis, for display, printing, or storage on a storage medium associated with the remote display terminals. Images may also be deleted on an interactive basis from a remote terminal. A specific communications protocol conveys image data between the host computer and remote data terminals. This protocol includes specific "time-out" limitations, CRC error checking schemes, and a specific "handshaking" signalling sequence that must be observed before the host system will permit manipulation of image files.

Apparatus and method for communicating textual and image information between a host computer and a remote display terminal

A digital broadcasting system and a data processing method are disclosed. The method includes receiving a data processing method includes receiving a broadcast signal in which main service data and mobile service data are multiplexed, acquiring transmission-parameter-channel signaling information including transmission parameter information of the mobile service data, and fast-information-channel signaling information, acquiring binding information describing a relationship between at least one ensemble transferring the mobile service data and a first virtual channel contained in the at least one ensemble by decoding the fast-information-channel, and acquiring status information of the first virtual channel, displaying content data contained in the mobile service data according to the binding information and the status information of the first virtual channel.

Digital broadcasting system and method of processing data in digital broadcasting system

A service multiplexer of a digital broadcasting system includes a null data generator, a mobile service multiplexer, a main service multiplexer, and a multiplexer. The null data generator may generate null data. The mobile service multiplexer may multiplex and output compression encoded mobile service data, additional data for a mobile service, and null data at a pre-determined first data rate. The main service multiplexer may multiplex and output compression encoded main service data and additional data for a main service at a pre-determined second data rate. The multiplexer may multiplex the output data of the main service multiplexer and the output data of the mobile service multiplexer at a pre-determined third data rate and transmitting the multiplexed data to at least one transmitter located at a remote position.

Digital broadcasting system and method of processing data

In conjunction with the dial-up public telephone system, voice quality lines carry videophone signals for monitoring a multitude of locations from at least one central station for use in a variety of applications, such as for security, surveillance, quality control and inspection, regulation of food and/or other standards in food-related and other facilities, market research, remote monitoring of deposit and withdrawal of funds at bank vaults, grocery chains, convenience stores, and the like. At the central station, telephonic interface apparatus is actuated by a control unit to selectively accomplish a telephonic connection with a remote location. Displays include the scene at the remote location and related graphic data. During routine operation, remote locations are displayed in sequence to at least one operator. Such operation may be interrupted either from a remote location or central station in the event of an urgency. In such an event, the concerned scrutiny location is displayed for further communication involving status, camera selection, camera configuration, audio, video and so on. Incoming calls from scrutiny stations imply an urgent situation for immediate display. The called number, by dialed number identification system (DNIS) may indicate the status while the calling number identifies the location by automatic number identification (ANI) signals. Alternative signaling and code techniques afford flexible operation as with respect to various graphic and status indications available for displays.

Videophone system for scrutiny monitoring with computer control

A transactional processing system is used in conjunction with a transmitting source. The system allows for real-time authorization of payments for a plurality of products and services made available by the transmitting source. A video menu is sent to a receiver representing a list of the available products and services. The receiver contains a credit or debit card reader and transmits financial account information, as well as the selection from the menu, via a modem to a payment processor. The payment processor verifies the programming selection and account information and transmits an authorization signal to the vendor or service provider. The payment processor would verify financial account information and forward payment authorization to a financial institution. The vendor, in turn sends the selected product to the consumer upon receiving payment from the financial institution.

Transactional processing system

A method for the transmission of digital data elements including radio paging information elements, wherein the data elements are transmitted according to a technique of transmission implementing a plurality of orthogonal carrier frequencies (the COFDM technique), the signal being organized in frames comprising, firstly, at least one first channel called a fast information channel, comprising at least one symbol of data elements, the carrier frequencies of the symbols being modulated by data elements that are not temporally interleaved, and at least one second channel, called a main channel, comprising at least one symbol of data elements, the carrier frequencies of the symbols being modulated by data elements that are temporally interleaved beforehand, a frame number belonging to a set of predefined frame numbers being regularly inserted into the fast information channel, each of the radio paging receivers being assigned at least one of the frame numbers.

Method for the transmission of digital data in radio paging systems and corresponding radio paging receiver

The present invention relates to a device for the digital transmission and display of graphics and/or of characters on a screen, the device comprising a terminal connected to a transmission network, to a graphic acquisition device and to a unit for display on a screen. Each terminal comprises a storage unit which, according to the invention, comprises a plurality of storage assemblies validatable in parallel, each storage assembly comprising a circuit effecting a logic combination between an input word and the word already written at the address indicated. The invention is more particularly applicable to the production of telewriting systems or of combined systems of telewriting and videotext (viewdata).

Device for the digital transmission and display of graphics and/or of characters on a screen

A digital signal to be received by a plurality of receivers, particularly restricted-range receivers, and divided into signal frames of which at least some include both a main data channel consisting of sub-channels, and a data transport path including at least one data channel consisting of separate data blocks dedicated to a single service and known as containers. Each container includes a header (41) consisting of a selection sub-header (44) containing, inter alia, data (46) for identifying a group of at least one container destination receiver, and a service sub-header (45) containing, inter alia, dedicated service data; a separately convolutionally coded working data field (42) containing source data for a given service; and an error detection and/or correction data field 943). Said selection sub-headers (44) are disconnected from the respective containers and collected in at least one dedicated service container subjected to simplified channel coding to enable the receivers to detect the presence of a container dedicated thereto by low-cost decoding analysis of said dedicated service container, said selection sub-headers (44) further containing access data (410) for determining the position of the corresponding container in said data path. The above-system enables the digital audio broadcasting (DAB) standard to be used for broadcasting paging data.

Digital signal organized in self-contained data containers, especially for data transmission to selective call receivers

The invention relates to a method for transmitting digital data containing radio-paging information, in which method the said data are transmitted by a technique of despatch employing a plurality of orthogonal carrier frequencies (COFDM technique), the signal being organised into frames comprising, on the one hand, at least one first channel, termed the fast information channel, comprising at least one data symbol, the carrier frequencies of the said symbols being modulated by data elements which are not interlaced in time, and at least one second channel, termed the main channel, comprising at least one data symbol, the carrier frequencies of the said symbols being modulated by data elements which have previously been interlaced in time, a frame number (46) belonging to a set of predefined frame numbers being regularly inserted into the said fast information channel, each of the radio-paging receivers (31i, 32i) of at least one of the said frame numbers.

Jean-Claude Rahuel

Papers

Method for the transmission of digital data in radio paging systems and corresponding radio paging receiver

Device for the digital transmission and display of graphics and/or of characters on a screen

Digital signal organized in self-contained data containers, especially for data transmission to selective call receivers

Method for transmission of digital radio-paging messages and radio-pager therefor

Method for transmission of digital radio-paging messages