Abstract: A high-speed image signal processing system for encoding an image signal, read out at a high speed, into an encoded signal, and/or for recording a decoded signal obtained through a decoding operation on an encoded signal. The image signal, obtained through a scanning operation on an original document, is sent to an encoder through an image bus. A code bus, provided at an output of the encoder, is connected with an encoded-signal memory for storing the encoded signal. A code transfer unit, for performing input/output operation over the encoded signal and for performing transfer of the encoded signal from the code bus to a system bus, is disposed between the code bus and the system bus. A control unit, performing control over the entire system, and a document management data memory, storing management data for performing management over documents stored in the encoded-signal memory, are connected to the system bus.

Abstract: In a high-speed image scanner, a driving method is proposed which needs no timing adjustment between the sensor driving pulse and the motor drive pulse required when the motor shifts from an accelerated state to a constant-speed state. The period of the sensor driving pulse is selected to be equal to or 1/N (N=integer) of that of the motor drive pulse at the time of constant-speed operation, and the phases of the sensor driving pulse and motor drive pulse are controlled independently of each other. Thus, even though the sensor driving pulse and the motor drive pulse are out of good timing, each line of the image can be surely read.

Abstract: A facsimile apparatus which carries out ringing of a telephone first for calling, and transmits a voice message informing of "absence" and "facsimile receivable" to a calling station when offhook is not detected during a predetermined period. The facsimile apparatus also transmits a called station identification signal CED after a silence interval of about 5 seconds. When the calling station onhooks a handset during the period of ringing of the telephone by judging that the called station is absent, a fee for a telephone call will not be charged. Furthermore, by setting the silence interval, the CED signal after the voice message is prevented from being heard by the calling station.

Abstract: Three chrominance signals representative of a color image are represented by a coordinate system in a uniform color space, and a probability of occurrence of colors on the color space and a correlation of the chrominance signals for pixels are referenced in encoding color image information signals.

Abstract: An apparatus for decoding a coded image into a pixel image and printing the pixel image at an essentially constant speed without using decoding means which decodes the coded image faster than a printing speed and pixel memory means for storing at least one page of pixel information. Decoding amount calculation means for calculating the decoding amount of the code to be decoded is provided, and compare means monitors whether the decoding amount exceeds the printing amount of the pixels to be printed and the code is converted to other code depending on the comparison result. The decoding means needs only receive the converted code from the code memory means and decode it to the pixel information. Thus, the constant speed printing apparatus is attained without high speed decoding means and one-page memory.

Abstract: A modem (modulator-demodulator) apparatus provided with modem circuits having different signal processing standards, which is optimized for a facsimile machine. Switching of modem functions can be accurately performed by concurrently operating modems with required standards selected from modems with different standards incorporated in a modem apparatus and incorporating in a common input/output port means for selectively switching an input/output of each modem and a dedicated signal detection means required for the switching, and further by constituting a facsimile using the this modem apparatus so as to perform the switching control from the facsimile body or automatically.

Abstract: In a synchronizing circuit, such as a DPLL (Digital Phase-Locked Loop), adapted to be synchronized in accordance with clock signals of an external clock, a programmable timer in the circuit is forcedly reset in synchronism with the edge of an external clock signal pulse at the time of the clock signal's initial state in accordance with a clock detection circuit. Subsequently, baud timing of the external clock signals is detected by making use of internal clock signals produced by the circuit. Synchronism is thus established and maintained between the circuit and the external device.

Abstract: An image processing system which can learn user's preference to satisfy him to the full, and also comprises means for inquiring a user about his satisfication degree to enhance it. The image processing system comprises means for learning user's preference such as his manner of setting and pressing a button, a destination, a condition set for copying, and means for changing a control parameter on the basis of the learning result.

Abstract: A first phase control loop not including a signal delay part and a second phase control loop including a signal delay part such as an automatic equalizer are formed independently of each other in a demodulator incorporated in a MODEM. The first and second phase control loops are arranged in such a relation that an input to the second phase control loop is not affected by an output of the first phase control loop, so that correction of a frequency offset by the first phase control loop and correction of a frequency jitter by the second phase control loop can be carried out independently of each other. This arrangement facilitates the design of the first and second phase control loops and improves the stability of the phase control system.

Abstract: The disclosure relates to a projector having an arrangement of polarizers and liquid crystal cells aligned on the axis of light in the order a first color polarizer colored in red, a first twisted nematic liquid crystal cell, a second twisted nematic liquid crystal cell, a second color polarizer colored in a green, a third twisted nematic liquid, a neutral polarizer and Guest-Host type colored in blue. Since, according to this, a polarizer having inferior color characteristics can be replaced by a Guest-Host type liquid crystal cell, the excitation purity and the scope of color reproduction are improved. Further, since the mixture of color is additive, the brightness of the reproduced color is also much improved.

Abstract: When a document and a recording medium are moved in a vertical scanning direction to read the document and record signals on the recording medium, the read signals are stored in a line buffer memory. The present invention changes over hysteretically a high speed vertical scan mode and a low speed vertical scan mode in accordance with the number of the buffered code bits in the line buffer memory to read the document and record the signal on the recording medium. Thus, the present invention reduces the number of stops of vertical scan.

Abstract: The present invention provides a method for controlling the movement of a print medium to be printed, for example, in a facsimile device. The invention uses printing velocities for each line (or printing unit) to be printed, which are calculated based on the number of black picture elements in the image signal related to this line (or picture unit). These calculated printing velocities are stored each for succeeding line to be printed and are then used to determine the moving velocity of the print medium for the actual line being printed.

Abstract: A picture signal processing apparatus comprises a signal processing means for performing signal processing such as picture element density conversion of picture signals, a first memory means for storing temporarily picture signals as object of the signal processing, a first signal path through which signals are received or transmitted between the signal processing means and the first memory means, an encoding means for performing encoding processing, a second memory means for storing temporarily picture signals as object of the encoding processing, a second signal path through which signals are received or transmitted between the encoding means and the second memory means, a control means for controlling the signal processing means and the encoding means, and a third signal path through which signals are received or transmitted between the signal processing means and the encoding means, thereby signal processing and encoding processing can be performed concurrently and high speed processing is realized.

Abstract: A control circuit is used for matrix drive recording. It includes a microprocessor, a RAM for storing data to be recorded therein, an address signal editing circuit for modifying the input addresses to the RAM, a shift register for converting the data from parallel to serial form and transferring it to a recording circuit, and a DMA controller for reading the data from the RAM and transferring it to the shift register.

Abstract: In a facsimile transmitter in which original document information to be transmitted is photoelectrically converted to an analog video signal which is binary-coded through a binary-coder to be stored in a buffer memory, and the stored information is read from the buffer memory to be sent to transmission lines the transmitter is further provided with a transition detector for detecting the transition point of the binary-coded video signal read from the buffer memory, a run length signal generator for counting the number of pulses of a clock signal until the transition point of the binary-coded video signal is detected thereby to generate a run length signal, and a small computer for effecting the redundancy suppressing process on the basis of the binary-coded video signal and the run length signal.

Abstract: A facsimile apparatus of analog type is disclosed, in which, in order to shorten the transmission time, continuous white lines of the white background of the original are read variably in number during each scanning line period. The information thus read is transmitted to the receiver in synchronism with the scanning line period. At the receiving end, the recording paper is rapidly fed for the scanning line period corresponding to the number of lines representing the received information.

Abstract: A picture information transmission method for a facsimile system. When the picture information for a plurality of documents are transmitted successively in the same transmitting mode, at least the group identifying signal and the group command signal are omitted from transmission. The omission of such signals is informed previously to the receiver so that the receiver is maintained in the state ready for receiving and according the picture information signals transmitted thereto successively in the same mode.

Abstract: A plurality of drive leads are taken out of the opposite outer ends of a thermal resistor assembly including a plurality of series-connected thermal resistor elements and junction points between adjacent ones of the thermal resistor elements, thereby dividing the drive leads to alternately belong to a first and a second set of drive leads. The drive leads of the second set of drive leads are further divided to alternately belong to a first and a second group. At least one of the drive leads of the first set of drive leads is selected in accordance with a given pattern and connected to recording signal input means. At the same time, one of the first and second group is selected in accordance with the given pattern, and a common power supply line associated with the selected group is connected to first potential means, a common power supply line associated with the group being connected to second potential means.