Abstract: A motion picture film having digital audio data recorded in at least one sound track thereof. Such digital audio data includes a plurality of bytes of data each having 8 bits of data. Each respective bit of each byte of audio data is recorded in a sound track of the film in the film running direction and each byte is arranged side-by-side in a direction normal to the film running direction to form a compression processing block. C1 parity data is added to each such compression processing block and C2 parity data is added after a predetermined interval of plural compression processing blocks. Error correction may be performed by utilizing the C1 and C2 parity data for each compression processing block and at the predetermined interval of plural compression blocks.

Abstract: The pair of radio communication apparatuses of this invention on a transmitter side and a receiver side conduct data transmission and receiving through radio communication by a space diversity method where a plurality of antennas are switched therebetween, wherein the radio communication apparatus on the transmitter side includes a transmission circuit for conducting data transmission and a transmitting antenna switch circuit for selecting a transmitting antenna among a plurality of transmitting antennas for transmitting radio waves and connecting the selected transmitting antenna to the transmission circuit, and the radio communication apparatus on the receiver side includes a receiving circuit for conducting data receiving and a receiving antenna switch circuit for selecting a receiving antenna among a plurality of receiving antennas on the receiver side the radio waves and connecting the selected receiving antenna to the receiving circuit.

Abstract: An information signal recording and reproducing apparatus having a reproducing head at a position anterior to a recording head by a distance corresponding to a predetermined time interval for recording an information signal on a recording medium and reproducing the recorded information signal. A test pattern signal is generated and delayed in a delay circuit by an amount determined by a control signal. An external delay-factor device receives the delayed test pattern signal and imposes a further delay thereon. The phase of the delayed signal from the external delay-factor device and the phase of the test pattern signal are compared and the control signal is generated, such that the sum of the amounts of delay imposed by the external device and the delay circuit becomes coincident with the predetermined time interval. Thus, the desired phase adjustment can be automatically and rapidly achieved with precision.

Abstract: There is disclosed a data processing machine comprising a transparent position detecting device which is installed closely adjacent to a display device and which detects positions on the display screen. A block diagram display device displays a block diagram related to the execution of respective data processings. A functional diagnosis system is actuated when the selection of any of the respective blocks of the block diagram displayed on the display device is detected by the position detecting device. The diagnoses determines whether the function or data processing corresponding to the selected block is normal.

Abstract: The disclosure is directed to a data transmission system capable of transmitting any desired data between a plurality of terminal units connected to each other for transmitting and receiving a variety of data wherein it is characterized in that; as soon as one of these terminal units first detects a signal collision, the relevant collision signal is instantly sent to the transmission line, thus enabling all other units to correctly detect such a collision, and as a result, an overall system capability for correctly detecting any collision occurring in the transmission line can be improved significantly, resulting in the minimized error throughout data transmission operations.

Abstract: A local network system interconnects computer devices, such as cash registers, scattered in a relatively small area. The local network system includes reception control element for determining the packet format of data received from a data transmission line and forming a response packet based on the result of the determination; a transmission control element for delivering data that is to be transmitted, or the response packet, in a prescribed packet format over the transmission line, and transmission and reception control elements for controlling the transfer of transmitted and received data between the reception and transmission control elements and terminal devices. Access to the transmission line, generation of packets, data buffering, retransmission control and other operations are effected not at high level or an application program level, but at the level of an interface or data transfer control apparatus that interconnects the terminal device serving as a main system.

Abstract: An in-line data communication system includes a bidirectional communication cable for connecting at least two terminal stations. A signal level compensation circuit is connected to the bidirectional communication cable for compensating for signal attenuation in the bidirectional communication cable. The signal level compensation circuit includes first and second amplifying circuits connected to each other in a parallel fashion. When a data signal is transmitted in one direction in the bidirectional communication cable, the first amplifying circuit is enabled and the second amplifying circuit is disabled. When the data signal is transmitted in the opposing direction, the first amplifying circuit is disabled and the second amplifying circuit is enabled.