This course is designed to provide required knowledge and skills in the communication systems such as microphone, loudspeakers, Stereo system, advanced sound system, B/W and Colour TV, Satellite and modern cable TV.
Introduction to audio system - Introduction to audio system, Introduction of sound, Fundamentals of a sound wave, Speech, music and noise. Nature of sound - Nature of sound, Reflection of sound, Standing Wave Ratio(SWR), Refraction of sound, Sound diffraction, Sound absorption. Frequency response, Equalization and Hi-Fi system - Frequency response, Equalization and Hi-Fi system, Frequency response, Equalizer, Equalization, Hi-Fi system. Microphone - Microphone, Introduction to microphone, Characteristics of microphone. Carbon microphone - Carbon microphone, Characteristics of carbon microphone. Condenser microphone - Condenser microphone. Crystal microphone. Capacitance microphone - Capacitance microphone, Characteristics of capacitance microphone. Moving coil microphone - Moving coil microphone, Characteristics of the moving coil microphone. Wireless microphone - Wireless microphone, Transmission principles of wireless microphone. Loudspeaker - Loudspeaker, Definition of loud speaker and specifications of loud speaker. Moving coil Loudspeaker - Moving coil Loudspeaker, Construction of moving coil loudspeaker, Characteristics of moving coil loudspeaker. Horn loudspeaker - IHorn loudspeaker, Comparison of cone type and horn type loud speakers. Headphone and its uses - Headphone and its uses, Headphones. Specification of loudspeaker - Specification of loudspeaker, Concept of Hi-Fi. Woofer - Woofer, Woofers. Tweeter - Tweeter, High frequency loudspeaker, Cone type tweeters, Dome type tweeters, Horn type tweeters. Baffles and Enclosure - Baffles and Enclosure, Baffles and Enclosure, Types of baffles, Enclosures, Bass Reflex Enclosures.
Disc recording and reproduction - Disc recording and reproduction, Sound recording methods, Introduction to gramophone records, Principle of disc recording, Gramophone recording, Principle of disc reproduction, Gramophone reproduction. Magnetic recording and playback - Magnetic recording and playback, Introduction to magnetic tapes, Various forms of magnetic tapes, Principle of magnetic recording and reproduction, Types of magnetic recording, Tape recorder and playback system. Advantage and disadvantages of recording - Advantage and disadvantages of recording, Advantages and disadvantages of disc recording, Advantages and disadvantages of magnetic recording, Comparison of magnetic recording over disc recording. Digital recording - Digital recording. Optical recording - Optical recording, Optical recording and its types, Methods of optical recording on films, Variable density method, Variable area method, Working of variable area method, Reproduction of sound from films. Block diagram of MP3 player - Block diagram of MP3 player, MP3 format, Block diagram of MP3 player. Compact disc (CD) - Compact disc (CD), Compact format, Optical recording of sound on CD, Block diagram of recording of sound on CD, Optical playback process, Advantages and disadvantages of CD. CD player - CD player, Principle of CD recording, Principle of CD playing, Advantages and disadvantages of CD, Comparison of CD and DVD. VCD player - VCD player, Video Compact Disc (VCD). DVD player - DVD player, Digital Versatile Disc (DVD), Working of DVD player, Comparison of CD and DVD. Concept of Monophonic sound system - Concept of Monophonic sound system, Monophony, Principle of monophonic sound system. Concept of Stereophonic sound system - Concept of Stereophonic sound system, Stereophony, Principle of stereophonic sound system, Block diagram of stereo system, Block diagram of stereo system, Introduction to stereo system, Block diagram of stereo system. Noise reduction techniques - Noise reduction techniques, Dolby noise reduction, Dolby noise reduction process, Dolby-A system, Dolby-B system.
Formation of picture - Formation of picture, Classification of communication systems, Types of various wireless system, Types of modulation, Formation of picture. Need for scanning - Need for scanning, Trace and retrace period, Types of scanning, Frame frequency, Field frequency. Need for synchronization - Need for synchronization, Horizontal and vertical synchronization, Blanking pulses. Frequency allocation of TV channels - Frequency allocation of TV channels. CCIR-B standards - CCIR-B standards, CCIR 625-B system of standards. Scanning and its types -Scanning and its types, Introduction to scanning, Sequential or progressive scanning, Flicker, Aspect ratio, Resolution (Kell factor), Horizontal resolution and video bandwidth, Interlaced scanning. Comparison of progressive and interlaced scanning - Comparison of progressive and interlaced scanning, Interlace scanning - bandwidth, Effect of bandwidth and advantages of interlaced scanning. Composite video signal - Composite video signal, Functions of the composite video signal, Composite video signal, Horizontal and vertical synchronization. Positive and negative modulation - Positive and negative modulation, Effect of noise on picture signal in positive modulation, Effect of noise on picture signal in negative modulation, Comparison of positive and negative modulation. Need for front porch and back porch - Need for front porch and back porch, Composite video signal for one horizontal line, Front porch and Back porch. Vertical sync pulse - Vertical sync pulse, Scanning sequence details. Video camera tubes - Video camera tubes, Introduction of camera tube, Characteristics of camera tubes. Image orthicon camera tube - Image orthicon camera tube, Introduction to image orthicon, Construction and working of image orthicon camera tube, Characteristics of image orthicon. Vidicon camera tube - Vidicon camera tube, Introduction of vidicon camera tube, Various sections of vidicon camera tube, Advantages and disadvantages of vidicon camera tube. Silicon diode array camera tube - Silicon diode array camera tube. Monochrome TV transmitter - Monochrome TV transmitter - Block diagram of monochrome TV transmitter, Video and audio section of TV transmitter, Diplexer. Monochrome TV receiver - Monochrome TV receiver - Block diagram Monochrome TV receiver. Horizontal and Vertical deflecting coils - Horizontal and Vertical deflecting coils, Difference between horizontal and vertical deflection coil. Television broadcast standards - Television broadcast standards, Specification of CCIR B and CCIR M TV standards, International use of TV standards. CCD camera - CCD camera, Introduction to CCD camera, Theory of operation of CCD camera.
Colour TV system - Colour TV system, Introduction to colour TV system, Properties of colours, Primary and secondary colours, RGB grivers of a colour picture tube. Mixing of colours – Mixing of colours, Complementary colours, Subtractive and additive mixing, Difference between additive and subtractive mixings. Hue, Saturation and Luminance - Hue, Saturation and Luminance, Hue, Saturation, Luminance, Colour wheel. Compatibility in TV system - Compatibility in TV system, Compatibility, Requirements for compatibility. National Television System Committee (NTSC) - National Television System Committee (NTSC), Colour signal transmission and reception, NTSC system, NTSC encoder, NTSC decoder, Limitations of NTSC system. SECAM system - SECAM system, SECAM encoder, SECAM decoder, Transmission of chrominance signal in SECAM system. PAL system - PAL system, PAL encoder and decoder, Merits and demerits of PAL system, Comparison of NTSC, PAL and SECAM colour TV system. Transmission of colour signal - Transmission of colour signal, Transmission of colour signal in the same channel bandwidth. Block diagram of colour TV transmitter - Block diagram of colour TV transmitter. Block diagram of colour TV receiver - Block diagram of colour TV receiver. Colour picture tube - Colour picture tube, Introduction to picture tube, Colour picture tube, Delta gun picture tube or shadow mask tube, Three gun inline or Precision In Line (PIL) colour picture tube, Trinitron picture tube, Comparison between delta, PIL and trinitron. Colour TV signals - Colour TV signals, Luminance signal, Chrominance signal, Bandwidth of chrominance signal, Colour burst and subcarrier frequency. Degaussing circuit in colour TV receiver - Degaussing circuit in colour TV receiver, Degaussing circuit in colour TV receiver, Degaussing circuit, Automatic degaussing coil. Colour TV service and operating controls - Colour TV service and operating controls, Colour TV receiver controls, Service controls of colour TV receiver. Flat panel display - Flat panel display, Display technologies, Drive methods. Plasma displays - Plasma displays, Plasma display. LCD and LED display - LCD and LED display, LCD display, Colour LCD panels, LED display.
Block diagram of modern cable TV system - Block diagram of modern cable TV system, Introduction of cable TV, Block diagram of CATV, Head end in CATV, Distribution system, Head end processor. Trunk and Cable distribution system - Trunk and Cable distribution system, Fiber optic trunk cable links. Scrambling and descrambling - Scrambling and descrambling, Scrambling and conditional access systems. Need for satellite for TV broadcasting over wide area - Need for satellite for TV broadcasting over wide area. Direct To Home (DTH) reception - Direct To Home (DTH) reception, Introduction to DTH, History of DTH, Components of DTH. Block diagram of DTH - Block diagram of DTH, DTH receiver front and back panel, Deficiencies in existing TV system, High Definition Television (HDTV). HDTV standards - HDTV standards, Introduction of HDTV standards, HDTV standards, Basic remote control system, Remote controller transmitter, Remote control receiver. DB meter - DB meter, Decibel meter (dB meter).
