Abstract: A system for inserting auxiliary data into an audio channel that carries an audio signal includes a modulator configured to convert an auxiliary data signal into a modulated auxiliary data signal that has a passband within the audio channel's passband. The system for inserting auxiliary data into an audio channel that carries an audio signal further includes summing means configured to combine the modulated auxiliary data signal and the audio signal into a combination signal to be carried in the audio channel.

Abstract: A system for inserting auxiliary data into an audio channel that carries an audio signal includes a modulator configured to convert an auxiliary data signal into a modulated auxiliary data signal that has a passband within the audio channel's passband. The system for inserting auxiliary data into an audio channel that carries an audio signal further includes summing means configured to combine the modulated auxiliary data signal and the audio signal into a combination signal to be carried in the audio channel.

Abstract: A technique for controlling audio dynamic range in a manner that can be permanent, reversible, or anywhere in between, and can accomplish this goal in the baseband PCM or encoded domains.

Abstract: A system and method associated with a recipient's audio equipment for maintaining desired loudness of a received audio signal is disclosed. The system includes a receiver device for receiving a broadcasted input signal and for transforming the input signal into a transport stream. The input signal and said transport stream have a non-processed audio signal component which contains its original dynamic range. A loudness controller is incorporated in the system so that it for receives the non-processed audio signal component of said transport stream and performs a process of dynamic range control on the non-processed audio signal component. A data signal containing settings for configuring the loudness controller is used for selectively controlling the operations of the loudness controller. The data signal allows external audio metadata to be accepted and used for control of the loudness controller.