Apparatus for artificially distorting video signals; Apparatus for decoding encoded signals; Apparatus for digital signal processing; Apparatus for displaying picture signals; Apparatus for electrical signal transmission; Apparatus for measuring biomagnetic signals; Apparatus for monitoring picture quality parameters of video signals; Apparatus for optical signal transmission; Apparatus for processing audio signals; Apparatus for processing digital video signals; Apparatus for processing video signals; Apparatus for recording audio signals; Apparatus for recording visual signals; Apparatus for signalization in industry; Apparatus for signalling; Apparatus for the acquisition of signals; Apparatus for the transmission of electrical signals; Apparatus for transmitting audio signals; Apparatus for transmitting electronic signals; Apparatus for transmitting radio signals by cable; Apparatus for transmitting signals; Apparatus for use in detecting signal levels; Audio signal processing apparatus; Broadcast signal processor apparatus; Coded signalling apparatus; Converters for analogue signals; Converters for digital signals; Devices for converting image information to digital signals for computers; Digital audio signal processors; Digital signal processing apparatus; Electric amplifiers (signal); Electric apparatus for the exchange of digital signals; Electric apparatus for the transmission of analogue signals; Electric apparatus for the transmission of digital signals; Electric signalling apparatus; Electrical amplifiers for sound signals; Electrical apparatus for converting signals into visual information; Electrical apparatus for the transmission of audio signals; Electrical instruments for signalling purposes; Electrical signalling apparatus; Electrical signalling instruments; Electrical transducers for producing sound from electrical signals; Electronic audio signal processors for compensating sound distortion; Electronic mixers for mixing signals; Electronic signal generating apparatus; Electronic signal processing apparatus; Electronic signal transmission apparatus; Electronic signal transmitters; Electronic units for transmitting audio signals; Instruments for signalling; Instruments for use in reception of electronic signals; Luminous signals; Optical signalling apparatus; Process signal converters; Radio signal transmission apparatus; Receiving terminals for signals; Samplers (signal); Set-top boxes (digital signal receivers); Signal adapting apparatus; Signal amplifiers; Signal convertors; Signal generators; Signal multiplexers; Signal processing apparatus; Signal processors; Signal splitters; Signal transmission apparatus; Signal transmitters; Signal transmitting apparatus utilising optical fibres; Signalling apparatus; Signalling apparatus and instruments; Signalling equipment; Signalling instruments; Signals, luminous or mechanical; Stereo signal generator apparatus; Switches (electric) for signals (electric); Television signal transmission apparatus; Transducer devices for converting incident electromagnetic signals to electrical signals; Transducer devices for converting incident ultrasonic signals to electrical signals; Transmitters for the transmission of electric signals; Transmitters for the transmission of electronic signals; Transmitters of electronic signals; Video signalling apparatus; Voice signalling apparatus for use with line telephone systems