摘要
从我国PAL制电视信号的固有特点出发,本文指出,若对PAL全信号采用f_1=2f_(sc)的亚奈奎斯特取样和DPCM编码,并利用消隐期间传送有效区数码,可实现在PCM三次群信道上传送一路彩色电视信号。
Proceeding from the specific characteristics of PAL television signals adopted in China, this paper points out that if the fs=2fsc of sub-Nyquist sampling and DPCM-encoding is used for PAL complete signal, and if the blanking time is utilized to transmit code of effective area, it is possible to transmit a color TV signal over PCM three-group channel.
关键词
编码
彩色电视
电视信号
LAL制式
Digital television
High-efficiency coding
Sub-Nyquist sampling
Differential pulse code modulation
Effective area coding
