Abstract: A video signal processing apparatus which can process video signals with different formats simply by switching between programs for processing video signals. Different system clock signals are sent to the input and output processes by employing a programmable signal processor 4, input synchronizing signal processor 8, programmable signal processor 6 and output synchronizing pulse processor 9. A method for processing the video signal can be flexibly changed simply by switching between signal processing programs for programmable signal processors. In addition, the use of a memory 5 enables the signal, which is processed using the system clock signal in the input process, to be processed using the system clock signal in the output process. The present invention thus allows the processing of video signals with many different signal formats. The design of efficient circuitry will greatly reduce costs and production processes.

Abstract: A video signal conversion part of a horizontal deflection circuit deletes a prescribed number of horizontal scanning lines from a vertical blanking interval of an input video signal and assigns a time corresponding to the deleted horizontal scanning lines to horizontal blanking intervals of the remaining horizontal scanning lines thereby extending the horizontal blanking interval of each horizontal scanning line and outputting a video signal. A synchronizing signal separation circuit extracts a horizontal synchronizing signal and a vertical synchronizing signal from the video signal output from the video signal conversion part. An output part of the horizontal deflection circuit supplies a sawtooth horizontal deflection current to a horizontal deflection yoke in synchronization with the horizontal synchronizing signal output from the synchronizing signal separation circuit.

Abstract: A television receiver comprising an information extracting circuit for extracting information from a format or content of an input video signal, a video signal processing circuit for processing this video signal by a program or data, a memory for storing the program and data, a CPU for controlling, operating or driving these elements, and a display device for displaying an image. The video signal processing circuit can, under the control of the CPU, decode the signal, correct or set the picture quality such as gradation and sharpness, or adaptively process an on-screen display based on the input video signal. The television receiver is also able to adaptively extend the functions of the television receiver corresponding to various signal formats.

Abstract: A video signal is reproduced by adjusting the amplitude of a horizontal high frequency signal, a vertical high frequency signal and a vertical temporal high frequency signal. Helper signals can be demodulated even if the helper signal levels vary due to receiving conditions. The number of circuits can be reduced by using a common circuit for amplitude adjustment of the helper signal and for automatic color control of a chrominance signal.