Abstract: A photoelectric conversion apparatus includes a plurality of elements (D) for receiving reflected light from an object, photoelectrically converting it into image signals (OS1-OS4), and outputting the image signals, a first output buffer (121) for outputting image signals received from even elements of the plurality of elements in the line from one end to the other end, a second output buffer (122) for outputting image signals received from odd elements from one end to the other end, a third output buffer (123) for outputting image signals received from even elements from the other end to the one end, and a fourth output buffer (124) for outputting image signals received from odd elements from the other end to the one end.

Abstract: A multiple print engine configuration allows a plurality of workstations (10) to create individual print jobs and then transfer them to a distributing processor (14). The distributing processor (14) is operable to spool the jobs in a print spooler (20) and then perform a software RIP on the print jobs. The RIP process divides the jobs into multiple individual jobs which are stored in the page buffer (24). An image task manager (26) in conjunction with an engine manager (28) are then operable to selectively distribute the pages to multiple print engines (16). They are distributed in such a manner that they are placed in the output bins (40) in the order that the pages were received in the print jobs.

Abstract: When serial data 110, which includes synchronous data 110A and effective data 110B, is received, a hold signal 130 is set at “1” and the PLL control is stopped while the effective data 110B is being received. As a result, low-cost, high-speed data transmission can be realized. Here, when one frame is composed of a start bit, the synchronous data 110A, and the effective data 110B, when the serial data 110 is composed of a plurality of frames, and when the bit length of data that has been transmitted either between the rising edges or between the falling edges of the synchronous data of the consecutive frames is an integral multiply of the dividing ratio of a divided clock signal, phase synchronization by the PLL with minimum transmission period of the synchronous data can be realized. As a result, the efficiency of image data transmission can be improved.

Abstract: In an image reading system having an image reading apparatus for reading the image of a document and an information processing terminal which receives the image data output by the image reading apparatus, the information processing terminal verifies the kind of operation performed at a control panel of the image reading apparatus, calls an image reading module and instructs the image reading apparatus to perform an operation based upon the kind of operation. The image reading apparatus responds by reading the image of the document, and the information processing terminal accepts the image data obtained and stores the image data in a predetermined area of a hard disk. This makes it possible to operate the image reading system efficiently.

Abstract: A method and apparatus for routing page data of a print job to the printers in a multi-print engine based on print job parameters associated with the page data of the print job is disclosed. One or more virtual printers are configured, each with a plurality of individual print engines, each having associated printing characteristics. Page data of the print job, downloaded from a print file and having the print job parameters associated therewith, is rasterized and stored as bit-mapped images in print buffers associated with the multi-engined printing system. The bit-mapped images are distributed to select ones of the print engines based upon matching the print job parameters of each bit-mapped images with the printing characteristics of the print engine to be selected.

Abstract: A clock dividing section receives a system clock and generates and outputs clock signals of two or more types. Selectors select any of the clock signals of two or more types outputted by the clock dividing section and feed it to a printing control block or reading control block. A decision divider monitors operational states of each block and gives control so that a frequency to be supplied to a functional block in an idle state where any operation is not required is lower than that to be supplied to a functional block being in an active state. Power consumption of the whole custom IC can be more reduced compared with a configuration wherein a clock of fixed frequency is constantly supplied to each functional block and a noise can be controlled.

Abstract: A left-side odd-component image signal (ODDL) output from an output terminal (OS1) of a 4-channel output CCD (4-division photoelectric conversion element) is input to an amplifier. A left-side even-component image signal (EVENL) output from an output terminal (OS2) of the 4-channel output CCD is input to the amplifier. A right-side odd-component image signal (ODDR) output from an output terminal (OS3) of the 4-channel output CCD is input to another amplifier. A right-side even-component image signal (EVENR) output from an output terminal (OS4) of the 4-channel output CCD is input to the amplifier. The amplifiers multiplex the left-side and right-side signals respectively, and a high-speed scanner control ASIC performs right/left correction.

Abstract: A digital image signal is read out at a predetermined picture element density by causing a light beam to repeatedly scan a recording medium bearing thereon an image in a main scanning direction at a predetermined main scanning speed while moving the recording medium in a sub-scanning direction substantially perpendicular to the main scanning direction at a predetermined sub-scanning speed, thereby two-dimensionally scanning the recording medium with the light beam, photoelectrically detecting signal light emitted from the recording medium upon exposure to the light beam to obtain an analog image signal, sampling the analog image signal at a predetermined intervals, and quantizing the sampled values.

Abstract: An image reader provided with an image pick-up unit which reads an image in a fast scanning direction in accordance with a fast scanning synchronizing signal, a drive unit which causes the image pick-up unit to move in a slow scanning direction in accordance with a drive control signal asynchronous with the fast scanning synchronizing signal, an intermittent read instruction unit which generates a stop instruction and a restart instruction for allowing the image reading to be performed intermittently by the image pick-up unit, a phase holding unit which, upon issuance of a stop instruction, recognizes and holds a phase difference between the fast scanning synchronizing signal and the drive control signal, and a phase control unit which, upon issuance of a restart instruction, corrects a phase difference between the fast scanning synchronizing signal and the drive control signal on the basis of the phase difference recognized and held by the phase holding unit.

Abstract: There is described a signal-controlling apparatus, having signal-processing circuits in each of which a synchronizing operation is improved. The signal-controlling apparatus includes a plurality of signal-processing circuits, each of which includes a clock-generating section to generate a clock pulse signal; a data communication line through which digital data are bilaterally communicated between the plurality of signal-processing circuits; and a reference pulse communication line through which a reference pulse is transmitted from a master signal-processing circuit, being anyone of the plurality of signal-processing circuits, to a slave signal-processing circuit, being another one of the plurality of signal-processing circuits. In the slave signal-processing circuit, the clock-generating section generates the clock pulse signal so as to adjust a phase of the clock pulse signal to that of the digital data, based on a phase of the reference pulse.

Abstract: A clock signal is frequency-modulated and an image processing operation is executed synchronously with the frequency-modulated clock signal to generate image data which is stored in a memory. Image data written in the memory is read synchronously with a clock signal having a fixed frequency. The image data written in the memory synchronously with the frequency-modulated clock signal is therefore converted into the image data synchronizing with the clock signal having a fixed frequency. Data subjected to image processing synchronously with the frequency-modulated clock signal can be output on the recording apparatus side without any practical problem.

Abstract: Disclosed is a method for causing a coinciding of resolutions of facsimile devices having different systems of measurement. The different systems of measurement can be a metric system and an English system of measurements. The method according to the present invention includes the steps of: exchanging protocols between a transmission-side facsimile device and a reception-side facsimile and determining a designed unit and a resolution of the reception-side facsimile device; calculating a rotating velocity of a step motor to be adapted to the designed unit and the resolution; driving the step motor at the rotating velocity to scan a document; and transmitting data obtained from the document to the reception-side facsimile device.

Abstract: A detector framing node controls generation of radiation and radioscopic image detection. Radioscopic image data is acquired and communicated independently of a host computer operating system. The detector framing node controls events in real time according to an event instruction sequence and receives the image data by way of an image detection interface into a memory unit. The image data is output from the memory unit to host memory of the host computer through a computer communication interface and under the control of a control unit. The detector framing node selects a flat panel detector from a plurality of different flat panel detectors and the image data is selectively reordered according to parameters of the selected flat panel detector before communication to host memory.

Abstract: A system and method for handling facsimile transmissions in a digital communications network, such as a GSM network. In general, the process includes first synchronizing incoming binary-coded facsimile information and then recording the degree of bit-rotation exhibited by the facsimile information. Segregated portions of the incoming facsimile information are identified as either a synchronization sequence, facsimile status information, or neither type. If a portion of the incoming transmission is identified as facsimile status information, any bit-rotated condition present in the portion is compensated for prior to further processing. In addition, once the incoming information has been synchronized, every time thereafter that a synchronization sequence or facsimile status information is identified in a portion of the incoming information, this event is used as an indication that the facsimile transmission is still in synchronization.

Abstract: A control process controls transmission of digitally encoded messages (DEMs) over a data communications network to allow real-time performance. The control process establishes a communication path which DEMs are sent. The control process can operate according to any data communications protocol, including the protocol native to the communicating device. The control process can establish communication paths based upon least-cost routing determinations. When there is insufficient bandwidth or excessive latency, the control process can choose a secondary path over which to transmit a DEM.

Abstract: An image forming apparatus which forms an image on a recording mateial, which has: a writing section to write according to the image data; an oscillator to generate a synchronized synchronizing clock signal; a spreading clock generator to spread the band of a synchronized reference clock and generate spreading clock signals; and a plurality of control circuits to control the image forming apparatus and each section of the image forming apparatus including a writing control circuit to control the writing section. More than one control circuits in the control circuits other than the writing control circuit are driven by the spreading clock signals, and the writing control cirucit is driven by the synchronizing clock signal.

Abstract: The present invention relates to a method for transmitting binary data at a rate of R bits per second via an optical conductor of length d. A transmitter produces pulses of duration &tgr;, which is considerably shorter than the bit period 1/R associated with the rate R. Owing to the dispersive characteristics of the optical conductor, these pulses are broadened on their path to the receiver to a value which is approximately equal to the bit period 1/R. One advantage is that there is no a priori need to use a laser with a narrow spectral width to achieve a long transmission distance d.

Abstract: An image reading apparatus is provided with a synchronizing circuit for synchronizing timing of scanning for image reading with timing of driving a pulse motor for the image reading, and a control circuit for variably controlling an output period of the timing of scanning for the image reading, and is arranged to be capable of varying the pitch of image reading at an arbitrary timing.

Abstract: An image pick-up module transmission arrangement includes a top cover holding a transparent glass above a scanning path defined therein and two racks along two opposite sides of the scanning path, two guide rails bilaterally fixedly fastened to the top cover at a bottom side of the scanning path, an image pick-up module reciprocated in the scanning path along the guide rails, the image pick-up module having pulleys revolvably supported on the guide rails and spring leaves disposed in contact with the guide rails, and a transmission shaft mounted in the image pick-up module, the transmission shaft having two gear wheels at two opposite ends meshed with the racks, the gear wheels being rotated clockwise/counter-clockwise by a power drive in the image pick-up module, causing the image pick-up module to be reciprocated in the scanning path along the guide rails.

Abstract: An image scanning method for a scanner that can simultaneously sense image signals corresponding to the three primary colors or a monochromic color, and store the signals in a storage device within one exposition process. The scanning method can further determine a period of the driving signal and a number of rotation steps for the driving motor to calculate the period of the triggering signal for a light-sensitive device. The scanning method according to the invention can therefore reduce the time needed for a scanning process and improve efficiency. Furthermore, the signal-to-noise ratio of a CCD module can be improved, and the requirement for the brightness of the light source is lowered as well.

Abstract: A multi-optical beam scanning apparatus for scanning by a plurality of optical beams has a synchronization detector 6 including light receiving sensors 7a and 7b having light receiving surfaces juxtaposed in a main scanning direction of the plurality of optical beams. Synchronization of write timings in the main scanning direction of the plurality of beams is detected on the basis of signals obtained from the light receiving sensors 7a and 7b under a predetermined condition, so that accuracy of the synchronization detection is improved and the synchronization adjustment is facilitated.

Abstract: An apparatus ID as an identifier of a filing apparatus is previously assigned to the filing apparatus, and an image ID as an identifier of an image and the apparatus ID are assigned to information to be registered, and thereby the information is managed. A registration sheet is prepared in order that a user can grasp the contents of the registered information, and an ID image pattern formed by patterning a data ID comprising the apparatus ID and the image ID is superimposed on the registration sheet. In extracting the registered information, the registration sheet is read and the ID image pattern is converted into the data ID, then the filing apparatus in which the information is registered is identified based on the apparatus ID included in the data ID, and the registered information is extracted therefrom.

Abstract: A closed-loop communication system includes a closed-loop communication link with a shared communication channel. A set of communication devices are connected to the closed-loop communication link. Each communication device has un-arbitrated access to the shared communication channel. A responding modem connected to the closed-loop communication link includes a modem signal detection circuit to identify a modem signal on the closed-loop communication link and respond to it by facilitating a squelch disable signal. A transmission squelch circuit squelchs all transmission signals from the responding modem except when the transmission squelch circuit is disabled in response to the squelch disable signal.

Abstract: An all-pixels reading type electronic endoscope apparatus enables the function of controlling the quantity of light which becomes impossible of follow-up when a still picture having a good picture quality is displayed to be quickly restored by reading all the pixels. The data on all the pixels obtained by a CCD at one exposure are read while using a light chopper, and the data on the odd lines are stored in a first memory and the data on the even lines are stored in a second memory. These memories are inhibited from being written into at the point of time when they store the picture data obtained at the same exposure, and the field signals formed from the video signals are stored in third and fourth memories. When a still picture is displayed, the third and fourth memories are inhibited from being written into, while the first and second memories are released from the write-inhibit state.

Abstract: A method of achieving line-to-line synchronization having a high degree of synchronization accuracy. Synchronization is performed by a specific high-speed block of logic which signals the beginning of scans to a PELCLK-based logic at pel boundaries, and provides sub-pel shifting as it passes data between the pel generation logic and a laser control signal. The synchronization error is made as small as propagation delays through a single multiplexer element. Such delays can be controlled to values less than 1/2 ns. The need to stop and restart the clocks is eliminated. All complex pel generation logic is clocked with the relatively low frequency PELCLK without regard to the synchronization task.

Abstract: A delay correction circuit includes a source of a clock signal and a source of a timing signal asynchronous with the clock signal. A timing signal detector is responsive to the clock signal and the timing signal, and is properly operative only when the timing signal is stable for a predetermined time period around the clock signal. A control circuit conditions utilization circuitry to operate after a delay time after the timing signal is detected. Adjusting circuitry conditions the control circuit to adjust the delay time if the timing signal was not stable within the predetermined time period.

Abstract: A data communication apparatus can conduct data communication by selecting an appropriate transmission rate in accordance with states of transmitting and receiving apparatus and a line condition.A transmission rate executable in accordance with an execution state of the process and transmission rates possessed by its own modem are informed to a destination apparatus, and transmission rates possessed by the destination apparatus and an executable transmission rate are received through the modem, and a quality of a line is also detected to determine the transmission rate. The transmission rate is changed in accordance with a change of execution state of the process during the communication.

Abstract: A method for adjusting scanning speed of a scanner according to the data transmission rate between the scanner and a host computer to avoid accumulation of image data in the scanner's memory buffer is disclosed. The method comprises the following steps:(1) initiating a time counter and transmitting a test data packet from the scanner to the host computer;(2) acknowledging the scanner after the test data packet is completely received by the host computer;(3) stopping the time counter and calculating the time used for transmitting the test data packet;(4) calculating a data transmission rate according to the size of the test data packet and the time used to transmit the test data packet; and(5) adjusting the scanning speed of the scanner according to the data transmission rate.

Abstract: A facsimile machine includes a machine housing; an upper guide member disposed above the machine housing and adapted to be movable between an operating position, in which a document transport path is formed, and an open position, in which the document transport path is opened; an operating panel mounted on the top of the upper guide member and provided with dial number call keys for calling previously stored dial numbers of destinations, and a function switching key for selecting from two alternative call dial numbers stored for each of the dial number call keys; and a key switching plate having openings through which the key heads of the dial number call keys are exposed with the key switching plate disposed on the operating panel so as to be invertible between a first position and a second position and adapted to move the function switching key in a switching manner upon the inversion thereof.

Abstract: An optical multiple-scanning device has a number of scanning laser light beams that scan along a scan path, are separated along the scan path by a predetermined pitch P, and produce an illumination spot of diameter D along the scan path. A synchronizing signal generating circuit for the optical multiple-scanning device includes a single photodiode and a signal processing circuit. The single photodiode has a width W along the scan path and generates a signal with maximums IMAX and minimums IMIN. If the condition W.ltoreq.P-D/4 is met, or if IMIN is less than or equal to 80% of IMAX, the signal processing circuit accurately generates a square-wave synchronizing signal such that successive rectangular pulses of the synchronizing signal cyclically indicate that successive scanning laser beams have reached a predetermined position along the scan path.

Abstract: Disclosed is an image scanner, which has: a reflecting mirror for reflecting a light reflected from a scanned manuscript in a predetermined direction; a sub-scanning means for sequential sub-scanning which parallel moves on a plane which has an acute angle to the surface of the scanned manuscript while keeping the reflecting surface of the reflecting mirror perpendicular to the surface of the scanned manuscript; a focusing lens which focuses the light reflected from the scanned manuscript which is reflected by the reflecting mirror; and an one-dimensional image sensor which outputs a manuscript image by conducting a photoelectric conversion of the light reflected by the reflecting mirror which is focused on a light-receiving surface of the one-dimensional image sensor by the focusing lens.

Abstract: A data processing device uses a portion of random access memory 121 as an output buffer 124 for holding a portion of a stream of PCM data which is to be output to a digital to analog converter 530. D/A 530 forms a left analog channel and a right analog channel for speaker subsystems 814 and 815. The PCM data stream is stored in the output buffer so that PCM data samples which pertain to the left channel are stored at even address and PCM data samples which pertain to the right channel are stored at odd address. Control circuitry 145 monitors direct memory access (DMA) transfers which transfer PCM data samples to PCM serializer 142. By comparing the address of each DMA transfer to a left/right channel signal from the D/A, the control circuitry can verify that channel synchronization is correct. If a synchronization error is detected, an channel synchronization error correction procedure is invoked.

Abstract: There is provided an image transmitting method whereby each picture plane is divided into a plurality of regions, a variable-length coding is executed to image information on a region unit basis, and the variable-length coded image information to be compressed is transmitted together with information other than the image information on a data block unit basis of a predetermined data amount, wherein boundary information indicative of the position in the data block of the boundary between the image information to be compressed of each of the divided regions is arranged in a predetermined portion of each of the data blocks, the resultant data blocks are transmitted, specific data which can be distinguished from the boundary information is included in the predetermined portion of each of the data blocks, the information other than the image information is given in place of the image information to the data blocks including the specific data, and the resultant data blocks are transmitted.

Abstract: An image pickup device having a solid-state image pickup element, and a memory for storing a signal read from said solid-state image pickup element, in which there are provided first and second clock pulse generation circuits for generating the clock pulse having respective predetermined frequencies, and a switch circuit for switching the clock pulse depending on whether said solid-state image pickup element is operating or not, is characterized in that when said solid-state image pickup element is operating, the processing pulse for each portion is generated based on the clock pulse generated in either one of said first and second clock pulse generation circuits, and when said solid-state image pickup element is not operating, the processing pulse for each portion is generated based on the clock pulse generated in the other clock pulse generation circuit.

Abstract: A facsimile apparatus comprises a communication unit for conducting data communication through a public line, and a changing unit for changing a transmission level of a signal transmitted by the communication unit to the line.

Abstract: A method and apparatus which writes image information into a memory and reads the image information out of the memory using different synchronizing signals. A first synchronizing signal which is used to write scanned image data into the memory is generated to have a predetermined regularity, for example using a clock signal. The second synchronizing signal is based on an output of a photosensor which detects laser light reflecting off a polygonal mirror and is based on the rotating speed of the motor. The image information in the memory is read out in synchronism with the writing of the image information by the laser beam and polygonal mirror onto the photoconductive element using the second synchronizing signal. Therefore, it is not necessary for the polygonal mirror and the motor driving the polygonal mirror to be at a predetermined stable speed during the scanning operation.

Abstract: A copying system is provided in which an image inputting unit and an image outputting unit are connected via a conventional data transmission path, and a copying operation is performed at the same speed as the conventional standalone copying machine. The image inputting unit has a first communicating unit, and the image outputting unit has a second communicating unit. Image data is transferred directly from the image inputting unit to the image outputting unit via the first communicating unit, the transmission path and the second communicating unit after a copying operation is initiated by a controlling unit. A scanning operation of the image inputting unit is performed in synchronization with an image forming operation performed by the image outputting unit.

Abstract: The printing speed of a page printer is modified relative to rasterization execution time (RET) for display commands that define images to be printed on each page strip of a page. The printer includes a variable frequency clock for producing a plurality of clock frequencies for modifying the printing speed. A processor compares the RET for each page strip with a threshold value. When a complex page strip is found whose RET exceeds the threshold, the variable frequency clock is appropriately controlled to generate a lower frequency clock signal to the print engine. The lower frequency signal causes the print engine to operate at a modified (slower) rate for a sufficient amount of time on any previously queued page strip(s) to provide an extended time frame for allowing the complex page strip to be rasterized. Printing speed is slowed, but rasterization time (clock speed) for the complex page strip is not slowed.

Abstract: A facsimile apparatus includes a read unit which reads a document sheet image, and a memory which stores the read image data. A recorder records the image data on a record sheet, and a selection unit selects a first copy mode or a second copy mode. In the first copy mode, the image data read by the read means is stored in the memory, and after the completion of the storing of at least one page of image data, the image data read from the memory starts to be recorded by the recorder. In the second copy mode the image data read by the read unit starts to be recorded by the recorder before the completion of the reading of one page of a document sheet. A controller asynchronously conducts reading of the image data by the read unit and recording of the image data by the recorder when the select unit selects the first copy mode, and synchronously conducts the reading of the image data by the read unit and the recording of the recorder when the select unit selects the second copy mode.

Abstract: The invention relates to a method and to an arrangement for the synchronization of the image recording of monochrome recordings and color recordings with photosensitive line sensors. A line-scanning pattern is generated by a programmable counter arrangement, wherein the timer measures the phase position of the line-scanning pattern, generated by the counter arrangement, with the aid of the computer and the programmable counter arrangement at the point in time of the impinging of a pulse of the incremental transmitter, wherein the timer compares these with a coordinated calculated or tabulated reference value, and wherein the timer employs the thus obtained phase difference in order to influence a counter, preconnected to the line counter CT2, in its count volume (FIGS. 1 and 2).

Abstract: A facsimile apparatus which includes a heater for fixing an image on a recording member and a heater control unit for controlling the heater. A timer is provided for outputting a time and a time range register registers a heater-on time range. A heater-on managing unit controls the heater control unit so that the heater is at a preheat temperature level within the heater-on time range, and so that the heater is at an image fixing temperature level when an image signal is received. Further, a heater-off managing unit controls the heater control unit so that the heater is at the image fixing temperature level out of the heater-on time range when the image signal is received. The heater-on managing unit can also shift a beginning time of the heater-on time range from a registered time to a time of a receipt of the image signal, so to extend the ending time of the heater-on time range when the image signal is received within the heater-on time range.

Abstract: A facsimile communication system includes a transmitter for transmitting data in a state where a minimum value of a total amount of data to be transmitted for each scanning line is secured, the data for each block including image data, and a receiver for receiving the data transmitted from the transmitter.

Abstract: A pixel clock generator in which the frequency of a pixel clock signal is changed over for every scanning face prior to start of image record scanning, comprises a first scanning time detection circuit for detecting scanning period of time from the start of image scanning to the end of the image scanning; a reference clock signal generation circuit for generating a reference clock signal to make the frequency of the reference clock signal variable; a number-of-pixel-clocks setting circuit for setting the number of pixel clocks corresponding to forecast scanning time; a second scanning time detection circuit for counting the pixel clocks generated based the reference clock signal by the number set by the number-of-pixel-clocks setting circuit to detect the scanning time corresponding to the forecast scanning time; a comparison circuit for comparing the time detected by the first scanning time detection circuit with the time detected by the second scanning time detection circuit to obtain a comparison result; a

Abstract: Signal generating means for generating a predetermined image clock signal to transfer image information and selecting means for selecting either the predetermined image clocks generated from the signal generating means or the image clocks which are generated from the signal generating means and are returned via the editing apparatus are provided on the copying apparatus side. When the predetermined image clocks to transfer the image information are generated from the signal generating means, either the predetermined image clocks generated from the signal generating means or the image clocks which are generated from the signal generating means and are returned via the editing apparatus are selected by the selecting means and can be used as common clocks when the image information which is read by the image reading means is transferred and when the image information which is generated from the editing apparatus is transferred.

Abstract: A circuit for matching resolutions of a data transmitted from a host computer and an image forming apparatus, the image forming apparatus including engine unit for printing the data on paper and video controller for synchronizing the data to be printed to a horizontal synchronizing signal and a video clock received from the engine unit and for serially transmitting the data to the engine unit by the one dot, is disclosed. A resolution matching circuit of an image forming apparatus having transverse direction enlargement portion for generating a second video clock by converting the frequency of the video clock received from the engine unit corresponding to the rate of the resolutions and for providing the second video clock to the video controller and longitudinal direction enlargement portion for temporarily storing a data of an odd number scanning and for providing the stored data to the engine unit as a data of a next even number scanning to be scanned.

Abstract: In response to a vertical synchronizing signal generated from a vertical synchronizing signal generator, a microcomputer forms a predetermined image on a print sheet using a printer head on the basis of image data applied from an image memory. The microcomputer controls the rotation of a motor so that the move position of the print sheet is set to a predetermined position with a vertical synchronizing signal as the reference after an edge of the print sheet is detected by a sheet sensor.

Abstract: An image input terminal synchronously transfers image data to a host terminal when the internal data transfer rate of the image input terminal exceeds the data transfer rate of the host terminal. The image input terminal scans the document at a constant rate, but the constant rate is slower than the normal scan rate for the image input terminal, thereby effectively scanning the document at a higher resolution. To realize an apparent internal data transfer rate equal to the data transfer rate of the host terminal, the image input terminal periodically discards or skips scanlines of valid image data to give the host terminal ample time to complete the transfer of valid image data. The image input terminal, to facilitate a synchronous transfer of image data, will skip N-1 scanlines of valid image data out of N scanlines of valid image data such that N is determined by the data transfer rate of the host terminal.

Abstract: A image edit apparatus in which area data of 16-bit width have been stored at the memory locations of the corresponding addresses of the respective memory planes of a plane memory 403. The operation of reading area data therefrom by a pseudo sync signal starts before a line sync signal becomes active. A density-conversion/area generating circuit 405 converts the data format from the plane type to the pixel type, so that area commands are generated. Then, the circuit 405 reads an edit command out of a logic RAM, using the area command as address, and outputs the command. By reading the area data earlier and processing that data, a delay in the density-conversion/area generating circuit can be absorbed, so that the output edit command is synchronized with the image data.

Abstract: System and method for minimizing data bottlenecks in Low Data Rate Networks (LDRNs) that communicate facsimile transmissions. An LDRN is a facsimile network having a transmission data rate less than the data rate of the FAX machines serviced by the network. The system and method can be implemented in any type of LDRN, including analog and digital wired LDRNs, as well as analog and digital wireless (e.g., cellular) LDRNs. The system and method involve processing the facsimile transmissions in order to make the data rates of the LDRN and the FAX machines compatible, thereby minimizing any potential facsimile data bottlenecks that may occur in the LDRN due to its slower data rate.

Abstract: An image reading device has a photoelectric transducer for scanning an image to read it line by line and converting the resulting optical data to an electric signal. A driver drives the photoelectric transducer in response to a synchronizing signal. An internal period signal generating circuit generates an internal period signal having a predetermined period. A period setting circuit sets the predetermined period of the internal period signal. A synchronization switching circuit selects and outputs either of the internal period signal or an external period signal sent from the outside of the image reading device as the synchronizing signal. Even when an external period signal from an image recorder including a polygon motor or similar external apparatus is not available or when the external apparatus is not operated, the device can surely read a document.