Broadcasting/Front-end equipment Broadcasting signal modulator Broadcasting signal demodulator Video server Broadcasting signal filter Channel Converter Broadcasting Signal Distributor Time Announcer Broadcasting Equipment Eraser Telephone Bridge Television Teleprompter Multi-channel Insertion System Broadcasting Signal Mixer Synthesizer/Multi-screen Guide System Set-top Box Scrambling and Descrambling Equipment Channel Processor Buzzer and Scoring Display System Time Base Corrector Video Key Mixer Amplifier Audio and Video Monitoring System Logo Clock Generator Emergency Switcher Automatic Broadcasting System Automatic Gain Controller Simultaneous Interpretation System Mixer Other Broadcasting/Front-end Equipment Communication Dispatcher