A content alignment service may generate content synchronization information to facilitate the synchronous presentation of audio content and textual content. The control procedure includes: dividing the common frequency band into more than one frequency band sub-block; allocating at least one user terminal to each frequency band sub-block on the basis of the modulation and coding schemes used by the user terminals; and controlling transmission power of the user terminals on the basis of the modulation and coding schemes used by the user terminals. The package includes timing control circuitry configured to implement a power saving process during the blanking periods of the video signal. The film may be separated into a solid portion and a vapor.