Abstract: A multi-media communication system has a data transmitter and communication terminals. Each communication terminal has a communication interface for communicating with the data transmitter via control signals, and a buffer for storing multi-media data. The control signals include a request for stopping data transmission, a request for restarting data transmission, and a request for transmission of a predetermined amount of data.

Abstract: A communication apparatus, such as a facsimile machine, for transmitting and receiving data to and from a device, includes a transmitter for receiving a first signal from the device and transmitting, in response to the first signal, a second signal for a predetermined time period. The transmitter receives a third signal from the device in response to the second signal, and transmits a fourth signal when the third signal is not received within the predetermined time period and transmits a fifth signal when the third signal is received within the predetermined time period. The transmitter receives a sixth signal from the device in response to the fourth signal. A detector, connected to the transmitter, detects which of the third signal and the sixth signal is received from the device. A controller, connected to the transmitter and the detector, controls a protocol of transmission and receipt of the data.

Abstract: To use a central processing unit (CPU) operating with a high frequency clock signal, a synchronous dynamic random access memory (DRAM) system includes a signal generator for receiving a first clock signal and second clock signal sequentially, and for outputting a first latch signal after receiving the first clock signal and before receiving the second clock signal, a selecting circuit for selecting a first DRAM cell in a memory cell array in response to a first address signal, and for outputting first data of the first DRAM cell after the first clock signal is received by the signal generator, and a latch circuit for latching the first data when the first latch signal is outputted.

Abstract: First and second independent optical fiber amplifiers, which preferably include first and second rare-earth doped optical fibers, respectively, are provided in a two-stage series or parallel configuration. An optical divider for dividing and taking out pumping light to a side opposite where the pumping light is combined, is coupled to the first optical fiber. An optical combiner combines the divided pumping light with the second optical fiber from a side opposite to a pumping light source. The amplification efficiency is promoted by using the pumping light which has not been used in the one optical fiber amplifier by inputting it to the other, and vice versa. Preferably, wavelength filters block naturally emitting light to first and second optical combining and dividing instruments. Alternatively, wavelength filters block signal light in inputting the divided pumping light to the optical fiber amplifier on the other side.

Abstract: To use a high performance central processing unit (CPU)(e.g., operating with high frequency), a memory system includes a memory cell array having a plurality of word lines connected to memory cells, a latch circuit for receiving and latching a first control signal in response to a first clock signal and for outputting a second control signal, and a decoder for selecting one word line among the word lines in response to an address signal when the decoder receives the second control signal. The latch circuit includes a first latch portion for latching the first control signal during a first cycle of the first clock signal, and a second latch portion for latching the first control signal during a second cycle of the first clock signal.

Abstract: A data browsing apparatus displays data automatically in an automatic page-turning mode. The data browsing apparatus has dynamic picture display parameters comprising a frame display time (w), a frame display pitch (m), and a display priority (r). The dynamic picture display parameters may be calculated based on automatic page-turning options designated by users. Dynamic pictures are displayed with accuracy at the automatic page-turning interval.