The document discusses the principles of high definition and NTSC television. It explains digital television transmission which involves video, audio and transmission signals. It describes 8VSB modulation used in ATSC digital television and reception/coverage. It then discusses the components, redundancies, resolution, sync and deflection of the NTSC television signal. Principles of the NTSC transmitter, receiver, synchronization and interlaced scanning are outlined. Finally, it discusses color CRT and convergence in NTSC color television principles.