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本文提出了一种付载频无需偏置而又具有良好兼容性能的正交平衡调幅制。对传送色差信号的对转付载波进行了频谱分析,并论证了它的特点。给出了对转色度信号的编码和解码原理、识别方法以及付载波形成方法和电路。指出了取消色同步信号而由行同步恢复付载波的可能性及其两种实现方案。最后,概述了对该制式的初步评价。除个别电路做过实验外,就整个方案来说尚属理论研究性质,可供从事彩色电视制式研究的人员分析探讨。
In this paper, we propose a quadrature balance AM system that does not need to be biased and has good compatibility. The spectrum analysis of the carrier for transmitting the color difference signal is carried out and its characteristics are demonstrated. The coding and decoding principle, identification method and subcarrier formation method and circuit are given. It points out the possibility of canceling the color burst signal and recovering the carrier wave by the line synchronization and its two implementation schemes. Finally, an overview of the preliminary evaluation of the system is outlined. In addition to the experiments done by individual circuits, it is a theoretical study of the whole scheme and can be used to analyze and discuss personnel engaged in the study of color television standards.