Systems and methods for adjusting audio levels in a plurality of audio signals

摘要

Systems and methods for adjusting audio levels in a plurality of audio signals are disclosed. One or more input signals containing one or more audio signals are depacketized. The audio signals are analyzed to determine if audio levels of the signals correspond to a desired audio level for at least some of the signals. The audio levels of signals that do not correspond are adjusted. Packets that do not require adjustment and the resulting adjusted packets are combined to form one or more output signals corresponding to the one or more input signals.

主权项

1. A system for adjusting the audio level of a plurality of packetized audio signals in a transport stream, the system comprising:
one or more input terminals for receiving the transport stream comprising a plurality of packets associated with the plurality of packetized audio signals, wherein at least some of the plurality of packets comprise a gain control metadata value; an audio signal extraction block coupled to the one or more input terminals to extract packets corresponding to each packetized audio signal from the transport stream, the audio signal extraction block further configured to sequentially transmit at least some of the plurality of packets corresponding to each packetized audio signal to an audio level adjustment block; the audio level adjustment block configured to execute a sequence of steps, for at least two packetized audio signals contemporaneously, the steps comprising, for each of the packetized audio signals:
analyzing packets corresponding to the packetized audio signal to extract an audio level of an encoded version of the packetized audio signal,comparing the audio level to a desired audio level, the desired audio level being provided as an external signal by an external controller coupled to the audio level adjustment block, andgenerating an adjustment signal based on the comparison between the audio level and the desired audio level;wherein the steps of analyze, compare, and generate are performedand an audio signal re-assembly block configured to receive adjustment signals from the audio level adjustment block and the transport stream, the audio signal re-assembly block configured to vary the gain control metadata value of the at least some of the plurality of packets based on the corresponding adjustment signal to generate a corresponding audio adjusted packet.