Abstract: A system for encoding digital data to be transmitted by way of the scan lines of a television video signal includes interface circuitry for receiving data from a number of input devices each operating at a particular data rate, and encoding processing circuitry which takes the data received by the interface circuitry and arranges it into separate data groups wherein each group corresponds to the particular input device which originated the data. The data groups are then inserted, with the aid of timing circuitry, into corresponding data channels defined in a selected scan line of the video signal. Accordingly, the system makes efficient use of the allowable bandwidth of the video signal by allowing data originating from a higher data rate device to be inserted into the same scan line which carries information originating from a lower data rate device.

Abstract: A transparent data transmission system for encoding data to be transmitted by way of the scan lines of a television video signal, includes interface circuitry for receiving data from a number of input devices each operating at a particular data rate, and encoding processing circuitry which takes the data received by the interface circuitry and arranges it into separate data groups so that each group corresponds to the particular input device which originated the data. The data groups are then inserted, by way of timing circuitry, into corresponding data channels defined in a selected scan line of the video signal. Also, a data channel bit map is defined over a portion of the selected scan line, and data identifying each of the input devices which is providing data to the interface circuitry is inserted into the data channel bit map.

Abstract: A self-contained and internally powered shock, temperature and relative humidity acquisition and recording device particularly adapted for the rapid, accurate and automatic analysis of material handling and transportation facilities and procedures. The apparatus includes transducers which are used to sense shock, temperature and humidity in analog form. The analog signals generated by the transducers are converted to digital signals, i.e., binary multi-bit words which by means of digital logic and solid state memory devices, statistical and time dependent information are stored for an operating interval as long as two weeks. Thereafter the device is coupled to an interrogation system which generates output records from the collected data in operator selected density profiles or time histories.