Monitoring audio fidelity and audio-video synchronization

A non-transitory computer-readable storage medium comprising a computer program that, when executed by one or more processors, monitors quality of audio delivered over a communications channel, the computer program comprising:

• program instructions for defining a sequence of two or more timestamps, the timestamps being associated with a measure of time progress while delivering audio to a client computer, each timestamp including a plurality of timestamp bits;
• program instructions for modulating an audio signal with the sequence of two or more timestamps, the modulating being with pseudo noise (PN) codes when a timestamp bit has a first logical value, and modulating the audio signal with a negative of the PN codes when the timestamp bit has a second logical value;
• program instruction for transmitting the modulated audio signal to the client computer;
• program instructions for extracting the timestamp bits from the received modulated audio signal to obtain two or more received timestamps;
• program instructions for determining a quality value of the audio based on the two or more received timestamps;
• and
• program instructions for storing the quality value of the audio in computer memory.

A method for monitoring quality of audio delivered over a communications channel, the method comprising:

• defining timestamps, the timestamps being associated with a measure of time while delivering audio to a client computer, each timestamp including a plurality of timestamp bits;
• modulating an audio signal with pseudo noise (PN) codes when a timestamp bit has a first logical value, and modulating the audio signal with a negative of the PN codes when the timestamp bit has a second logical value;
• transmitting the modulated audio signal to the client computer;
• extracting the timestamp bits from the received modulated audio signal to obtain received timestamps, wherein extracting the timestamp bits further includes:
• detecting a correlation on the received modulated audio signal to determine if PN codes or negative PN codes are received, wherein a correlation with PN codes is interpreted as a timestamp bit with the first logical value and a correlation with negative PN codes is interpreted as a timestamp bit with the second logical value;
• assessing a quality of the audio based on the received timestamps;
• and
• storing the quality of the audio in computer memory.

A method for monitoring quality of audio delivered over a communications channel, the method comprising:

• defining timestamps, the timestamps being associated with a measure of time while delivering audio to a client computer, each timestamp including a plurality of timestamp bits;
• modulating an audio signal with pseudo noise (PN) codes when a timestamp bit has a first logical value, and modulating the audio signal with a negative of the PN codes when the timestamp bit has a second logical value;
• transmitting the modulated audio signal to the client computer;
• extracting the timestamp bits from the received modulated audio signal to obtain received timestamps;
• assessing a quality of the audio based on the received timestamps, wherein assessing the quality further includes:
• measuring a percentage of time that the received modulated audio signal is correlated with the PN codes;
• and
• storing the quality of the audio in computer memory.

A method for monitoring quality of audio delivered over a communications channel, the method comprising:

• defining timestamps, the timestamps being associated with a measure of time while delivering audio to a client computer, each timestamp including a plurality of timestamp bits;
• modulating an audio signal with pseudo noise (PN) codes when a timestamp bit has a first logical value, and modulating the audio signal with a negative of the PN codes when the timestamp bit has a second logical value;
• transmitting the modulated audio signal to the client computer;
• extracting the timestamp bits from the received modulated audio signal to obtain received timestamps;
• assessing a quality of the audio based on the received timestamps, wherein assessing the quality further includes:
• measuring a longest sequence of consecutive timestamps extracted during a period of time;
• and
• storing the quality of the audio in computer memory.