Abstract: A method for determining a coding type and a coding mode for object shape coding is disclosed. A coding mode is determined according to the characteristic of an object and shape, and the shape is coded by varying a coding method according to the determined coding mode.

Abstract: A digital video data decoding apparatus and a control method therefor are disclosed. A plurality of synchronization patterns are stored, and the synchronization pattern of the reproduced incoming data is compared with a stored synchronization pattern. Therefore, even if the synchronization pattern is altered, the altered synchronization pattern can be detected. Further, the header data and the user data can be extracted from the error-corrected data, and they are stored in the header data buffer and the user data buffer. Then they are outputted directly to the system by utilizing the direct memory accessing section. Consequently, the data processing amount of the CPU is reduced, thereby improving the data processing speed.

Abstract: An apparatus for remedying errors in a head end monitoring block includes an optical transmitting section for transmitting/receiving aerial broadcasting signals and its own broadcasting signals; a host computer for controlling respective sections of a head end; a master control section for monitoring an operating state of a transmitting path of the head end and the codeck boards; a master mother section for receiving certain signals from the master control section so as to connect communication paths between the optical transmitting section, the host computer and the master control section; a slave control section for monitoring the transmission state of a relevant codeck board, and for receiving an error occurrence signal from the master control section so as to carry out the function of the master control section in place of it; and a slave mother section for receiving an error occurrence signal from the master control section so as to connect communication paths between the optical transmitting section, th

Abstract: A viterbi decoder includes a maximum likelihood state value detecting device separated from a feedback loop consisting of an ACS arithmetic unit, a normalization arithmetic unit, and a state value storing device. In operation, a maximum likelihood state value is detected by utilizing the output of the state value storing device, to thereby enhance operating speed. Further, ajudgment is made as to whether a state having the minimum state value at an immediately preceding time is back-traceable from a state having the minimum state value at a current time by using survivor path information. Non-back-traceable non-correspondences are then detected, and the number of occurrences of non-correspondences are counted. If the occurrences of non-correspondences exceed a reference value, it is judged a non-synchronization. In another method, synchronization/non-synchronization is judged by detecting whether a traceback is possible, without utilizing survivor path information.

Abstract: A loop back device of a packet communication T1 network includes: a clock generating part which inputs a frame divisional clock and a reference clock, inserts a modulated clock at a predetermined position of the reference clock to generate a main clock and is synchronous to the transformed clock position to generate a system clock for generating and extracting loop back data; a loop back data inserting part which generates the loop back data and is synchronous to the system clock generated from the clock generating part to insert the loop back data into transmission data; a framer and interface part which inputs the transmission data including the loop back data outputted from the loop back data inserting part to transmit the input data to the T1 network and receives is data from the T1 network; a loop back data extracting part which is synchronous to the system clock generated in the clock generating part to extract the loop back data from reception data outputted from the framer and interface part; and a pr

Abstract: A circuit for converting frame data is disclosed, in which data communications can be carried out by matching the T1 repeater line of the North American method and the E1 repeater line of the CEPT. The four 32-channel frame data of the E1 line of the CEPT method are converted into parallel data of 8-bit one channel, and are stored into four 64-byte buffers. The stored 32-channel frame data are read out by 24 channels at a time, while the remaining data of the 6 channels are added to the data which have been stored in the buffers. Thus five 24-channel frame data are converted into serial data before being outputted. Of the five 24-channel frame data of the T1 repeater line of the North American method, four 24-channel frame data are stored into four 64-byte buffers, while the remaining one 24-channel frame data are separated by 6 so as to store them into the four 64-byte buffers, so that the four 64-byte buffers can store the 32-channel data respectively.

Abstract: A cyclic redundancy check (CRC) circuit for detecting and correcting errors in a data stream uses a decoder and a serial-to-parallel buffer to shorten arithmetic operation time. The CRC circuit includes a first gate for switching a serial input data stream into a syndrome register section, and a buffer register for converting the serial input data to a parallel data. The syndrome register section forms redundancies for input data stream. An OR gate receives data from the syndrome register section to enable a decoder if the syndrome register section detects an error in the data stream. The decoder decodes the output from the syndrome register section. The output of the decoder is exclusively-ORed with the input data in the parallel shift register. A latch circuit thereafter outputs a corrected serial data stream.

Abstract: An objective lens drive for a laser disk apparatus drives an objective lens in focusing and tracking directions to ensure that a light beam generated from a source such as a laser diode through an optical system correctly focuses on a recording surface of a medium and follows a recording track. Focusing and tracking spring plates are formed by a one-piece spring plate device that is folded back on itself by about 180 degrees at a predetermined location. The device thus occupies little space. Slides and grooves are formed at an actuator base and a carriage, respectively, for tilt adjustment of the objective lens.

Abstract: An outwardly divergent and elliptic input laser beam is converted into a collimated and circular laser beam using a single aspheric lens. An input surface of the aspheric lens has a convex hyperbolic spherical cross-sectional surface in a vertical direction normal to an optical axis and a concave spherical cross-sectional surface in a horizontal direction normal to the optical axis. An output surface of the aspheric lens has a planar cross-sectional surface in the vertical direction normal to the optical axis and a convex elliptical cross-sectional surface in the horizontal direction normal to the optical axis.

Abstract: A method and apparatus for cleaning the charge line of the transfer charger before copying process in an electrostatic apparatus. The cleaning apparatus comprises cleaning member, such as brush, light-blocking plate, driving motor, a pair of pulleys, wire, positon sensors and control member. Motor driving program is recorded on the the controller for applying power and cleaning the charge line automatically, whereby a dim or unclear image does not appear on copy sheets.

Abstract: The invention disclosed relates to a facsimile transmission/reception method and apparatus using a common bus in an office automation system, and in detail to a facsimile transmission/reception method and apparatus using a single common bus for transmitting and receiving data and control signals to be interfaced with the outer devices.The apparatus comprises a decoding means 31 being applied with a scanning output data chip selection signal CS1 and a liquid crystal display chip selection signal CS2 for decoding a corresponding selection output signal, a selection output means 34,35 controlled by a first and second storage means 32 and 33 latching data, control signals and the like and the decoding means for selectively outputting the data latched by the first and the second storage means, and a common bus 37 for transmitting the data outputted by the selection output means to the operation panel unit 40.

Abstract: A bus interface circuit is for coupling between a microprocessor having an architecture in which address and data buses are separated and peripheral equipment having a multiplexing bus architecture. The bus interface circuit includes a first delay circuit for delaying a first address strobe signal of a microprocessor to obtain a first data strobe signal, a second delay circuit for delaying the first data strobe signal to obtain a second data strobe signal for the peripheral equipment, a logic circuit for multiplying an inverted first data strobe signal and the first address strobe signal to obtain a second address strobe signal for the peripheral equipment, a first buffer enabled by the first data strobe signal for transmitting address data of the microprocessor, and second buffer means enabled by the second address strobe signal for transmitting and receiving data information between the microprocessor and the peripheral equipment.

Abstract: An adaptive quantizing apparatus and method in HDTV according to the invention is capable of modifying a quantization spacing for the individual blocks to be processed in accordance with the human visual system, such as motion, complicatedness, brightness, etc. of a picture. To this end, a picture portion which is prone to present any conspicuous visual undesirable effects is tracked down and assigned a modified bit rate so that a bit rate is lowered for a picture portion where such undesirable effects, if they occur, should not be very conspicuous, decreasing the probability of enhancing the subject picture quality.

Abstract: In a phase synchronizing loop apparatus for digital audio signals, a clock operation is controlled in accordance with a plurality of audio data formats, allowing a data transmission clock to be generated using a phase synchronizing loop. The apparatus includes an edge detector for detecting an edge of applied data, a clock generator for retaining the signal from the edge detector for a predetermined period of time to generate a clock signal, first and second phase synchronizing loops for detecting a phase difference between the clock signal and the oscillation output of a voltage controlled oscillator, a controller for generating a control signal in accordance with the audio data formats, and a display for discriminating a synchronization state and displaying an indication thereof.

Abstract: An actuator of an Optical disk unit is controlled to convey an optical head to a target track in accordance with a tracking error signal and an acceleration pattern signal of the actuator. The acceleration pattern signal is integrated to obtain a commanded velocity of the actuator, and the tracking error signal is processed to determine a displacement velocity of the actuator. Also, a reference tracking error is determined in accordance with a variation of the displacement velocity. The commanded velocity, displacement velocity and reference tracking error are compared to obtain an error signal indicative of a difference between the commanded velocity and an actual displacement velocity of the actuator. The error signal is then differentiated and used to adjust the acceleration pattern signal, and the thus corrected acceleration pattern signal is used to drive the actuator.

Abstract: In an copying apparatus of the cartridge type having a photosensitive drum, a staticization charger, a destaticizer and any other peripheral processor units, a variable width slit formed above the drum and in the optical path between the light source and the photosensitive drum for regulating the amount of light reaching the drum. The variable width slot acts as a compensation devise to compensate for varying sensitivity of the photosensitive drum. The width of the slot is altered by changing the position of a sliding adjustor member so as to vary the amount of light reaching the drum to compensate for the variation of the sensitivity of the drum resulting from the various manufacturing parameters thereby enhancing the reliability of the manufactured apparatus.

Abstract: An apparatus for fixing a copy paper for use in electrophotographic appliances, such as laser beam printers or copying machines, includes components for stretching the leading edges of copy sheets at the entry of the nip defined by the fixing station for preventing crumpling of the copy sheets, reverse pressure component for bowing downward and flattening the leading edges of the copy sheets, and cleaning device including a cleaning box provided with a roller brush which is rotatable in the same direction as the heating roller for cleaning up the periphery of the heating roller, and a brush cleaning member for dusting off the roller brush. With this arrangement, when two-sided copying of the copy sheets is performed, jamming of copying sheets is prevented, thus improving copying efficiency.

Abstract: A movable display assembly is incorporated in the car stereo for adjusting the screen viewing angle of the LCD. The movable display assembly comprises a semi-spherical display means and a guide shaft for guiding the display means in any direction within a semi-circular cavity which is formed in the forwardly opening of the front panel of the car stereo. The semi-spherical display means includes a convex rear wall and an LCD constituting the front face of the display means. The guide shaft extends horizontally from the rear face of the display means and is loosely fitted in an opening formed in the cavity. A frictional means is provided in order to hold the movable display means in place.

Abstract: A locking hinge device for adjusting the screen viewing angle of a word processor includes a hinge pin to which a keyboard cover is hinged. The keyboard cover has an LCD screen fixed to the front face thereof. The elongated hinge members are integrally formed with the keyboard cover and hinged to the hinge pin. The hinge members have axial bores. The axial bores are constructed to include circumferentially arranged recesses that receive detents which provide a corresponding number of stationary positions for providing different operator viewing angles over a wide range of adjustment. Restraint members are provided with circumferentially arranged detents on the outer circumference thereof for being positioned in the corresponding detent receiving recesses.

Abstract: A combination LCD screen and keyboard cover of a lap top computer is hinged to a main or keyboard body. The combination cover is used as either an LCD screen when opened or a keyboard cover when closed. The LCD screen is fixed to the inner face of the combination cover. The combination cover has a tilt adjusting apparatus for adjusting the screen viewing angle of the LCD screen. The tilt-adjusting apparatus comprises a pair of bracings which extends from one side of the combination cover and is hinged to a housing by hinge shafts. A pair of racks are longitudinally fixed to the rear wall of the housing and a mating pair of pinions are fixedly mounted on pinion shafts. Driving gears are fixedly mounted on the hinge shafts for rotating the pinions in the same direction through idle gears and transmission gears. Friction bands are wound around one cylindrical end of the hinge shafts in order to hold the tilt combination cover in place.