Transport Driver Interface

Abstract: The invention relates to an analogue signal generator for a TDI (Transport Driver Interface) CCD (Charge Coupled Device), which is used for generating analogue signals of output signals of the TDI CCD and overcoming the defect that the TDI CCD is not suitable for repeatedly testing in a process of debugging and developing a signal processing circuit of the TDI CCD. The analogue signal generator specially comprises a timing sequence generation circuit, a signal combination circuit, a filtering circuit and a power supply circuit. The timing sequence generation circuit generates a logic signal pulse, the analogue signals of the output signals of the TDI CCD are preliminarily obtained through the signal combination circuit, and then the analogue signals of the output signals of the TDI CCD are finally obtained after passing through the filtering circuit. According to the analogue signal generator for the TDI CCD provided by the invention, the analogue signals of the output signals of the TDI CCD under different integration time are simulated by adjusting the period of the analogue signals, so as to replace the output signals of the TDI CCD to be used for the development of the signal processing circuit of the TDI CCD.

Abstract: The invention discloses a TDI (Transport Driver Interface) infrared detector signal processing system based on alternating-current coupling. The TDI infrared detector signal processing system comprises a TDI infrared detector, a high-pass filter circuit, a signal conditioning circuit, an analog-to-digital conversion circuit and a data processing circuit, wherein the data processing circuit is realized by using a programmable logical device. According to the characteristics of an output signal of the TDI infrared detector, direct-current components in the signal of the detector are removed through the high-pass filter circuit, and only a changed alternating-current signal is subjected to analog modulation and analog-to-digital conversion; and a relative difference value between an effective signal and a reference benchmark, i.e., a quantized datum which corresponds to a reset reference signal output in each line of the TDI infrared detector after alternating-current coupling is determined, so that an effective signal output by using detector is subjected to digital direct-current recovery. Compared with the conventional TDI infrared detector signal processing system, the TDI infrared detector signal processing system disclosed by the invention has the characteristics of restrain of common mode interference, reduction in the influence of device drift, simplification of circuit design, reduction in system power consumption, and the like.

Abstract: A file security active protection method based on double-drive linkage specially includes steps of: installing drives so as to enable service; loading linkage drives through service management items; reading preset file safety protection rules to a rule chain; giving an inlet of an intelligent resource planning (IRP) processing routine function to a Driver Object; filling a Fast input/output (I/O) processing routine; leading a file filtering drive to normally send the routine and monitor cache; building a system thread, obtaining transmission control protocol/internet protocol (TCP/IP) device objects, then starting a network drive comprising a transport driver interface (TDI) layer and a network driver interface standard (NDIS) layer, and performing monitoring action for operating files through network processes; and leading the file filtering drive to filter received IRP according to the rule chain and perform IRP-level monitoring on user action protected by the files. The file security protection technology based on kernel mode file system drive and network drive linkage effectively solves problems of file damage and file stealing caused by malicious file operation, network attack activities and Trojan virus.

Abstract: PURPOSE: A security method and a security system based on a proxy with improved identification reliability of a connector are provided to efficiently translate an address by inducing the connection of a user terminal with a security target server to a security device. CONSTITUTION: An address conversion module(13) checks destination address information of transmission target data to be transmitted to a security target server in a kernel area. The address translation module translates the address information into an address of the security device. An identification information configuration module(14) configures identification information to be processed by packet in transmission target data. A security device(20) selects the transmission target data of a user having a connecting authority about the security target server by identifying identification information which is configured in transmission target data. The security device transmits secure data of the security target server to a terminal. Address translation in the address translation module is performed for address information which is set in a TDI(transport driver interface) in a kernel area of the terminal. [Reference numerals] (11) Access application; (13) Address conversion module; (14) Identification information configuration module; (21) Communication module; (22) Identity validation module; (23) Proxy module; (31) Processing module; (AA) User area; (BB) Canal area