Abstract: In a data filing system, a data input unit converts an input document into an electrical image signal. A data processing unit sequentially performs multi-step image compression processing including a pattern recognition step. The processing unit includes subprocessors which independently execute corresponding image compression processing of higher processing levels. A data storage unit has a hierarchical memory structure, so that, when it receives compression image data of a given image processing level from the processing unit, it can store this data in accordance with its image processing level. A system controller causes, in the document registration mode, the first subprocessor of the data processing unit to execute image compression processing of a first level, and causes the data storage unit to store the resultant compression image data.

Abstract: In this information transmission system, a PCM encoder is provided for time-division multiplexing multichannel audio signals and a digital character information signal to generate a time-division multiplexed, or TDM, information signal. The TDM information signal is angle-modulated by the modulator to generate an angle-modulated information signal. This signal is supplied to a frequency-division multiplexer, which multiplexes the angle-modulated information signal and an image signal so as to generate a frequency-division multiplexed, or FDM, information signal which is adapted to be supplied to a certain subscriber.

Abstract: A friction member is a clutch facing, a brake pad, or a brake lining which comprises a phenolic fiber, a plated organic fiber, and/or mixed fiber thereof, which may or may not comprise the other fibers such as nonorganic fibers, as based material of the aforementioned friction member, wherein various difficulties of asbestos are improved.