noun
multiplex broadcast; multiplex transmission
Technical term for broadcasting multiple audio channels simultaneously, such as bilingual or stereo TV sound.
この番組は音声多重放送で、副音声では英語が流れている。
This program is a multiplex broadcast, and English is available on the sub-audio channel.
Compound of 音声 (onsei, 'voice, audio'), 多重 (tajū, 'multiple, multiplex'), and 放送 (hōsō, 'broadcast').