According to the invention, original information is coded in a main channel and a subchannel to generate a signal for transmission, the subchannel being more robust with regard to channel effects.
为了产生要传输的信号，将原始信息编码成为主信道和副信道，其中副信道比主信道对信道干扰更具鲁棒性。
2
For example, if the digital TV channel is channel 53, then 53.1, 53.2 and 53.3 could be three sub-channels on that channel.
对于数字频道53来说，53.1，53.2，53.3就是它的三个子频道。
3
The elements shown are the most commonly used channelsub-elements.