Complex sentence: This format is what was defined for use in DVB transport streams when encoders use either SBR or parametric stereo AAC extensions, however it is restricted to only a single non-multiplexed AAC stream.
Split into simpler sentences: This format is what was defined for use in DVB transport streams when encoders use either SBR or parametric stereo AAC extensions. However, it is restricted to only a single non-multiplexed AAC stream.