Method and system for measuring audio transmission delay

A system for measuring an audio transmission delay, comprising:

• a transmitter;
• a receiver;
• one or more processors;
• and
• one or more memories storing program instructions, that when executed by the one or more processors, configure the system to perform the following operations:
• performing synchronization operation on transmission of an original audio codebook to be tested between the transmitter and the receiver, and determining sending start instruction information, sending end instruction information, receiving start instruction information, and receiving end instruction information of the original audio codebook;
• starting, by the transmitter, sending the original audio codebook to the receiver according to the sending start instruction information;
• stopping, by the transmitter, sending the original audio codebook to the receiver according to the sending end instruction information;
• starting, by the receiver, capturing the original audio codebook from the transmitter according to the receiving start instruction information to obtain a test audio codebook;
• stopping, by the receiver, capturing the original audio codebook from the transmitter according to the receiving end instruction information;
• and
• obtaining the audio transmission delay based on the test audio codebook and the original audio codebook pre-stored in the receiver,
• wherein obtaining the audio transmission delay based on the test audio codebook captured by the receiver and the original audio codebook pre-stored in the receiver comprises:
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• wherein Rxy(τ) is a value of a cross-correlation function between the original audio codebook and the test audio codebook corresponding thereto, ts is a time when the receiver starts capturing the original audio codebook from the transmitter, te is a time when the receiver stops capturing the original audio codebook from the transmitter, t is time information corresponding to each sampling point, x(t) is an energy value corresponding to a sampling point at time t in the original audio codebook, τ is an offset of a sampling point in the test audio codebook used in convolution with x(t), and y(t+τ) is an energy value corresponding to a sampling point at time t+τ in the test audio codebook,
• wherein the audio transmission delay is represented by a value of τ corresponding to a maximum value of the cross-correlation function,
• wherein TestValue(k) is a delay value corresponding to a maximum value of the cross-correlation function obtained by solving an ith original audio codebook and an ith test audio codebook corresponding thereto obtained through a kth measurement of the ith original audio codebook, the delay value is a time-domain value obtained by dividing a value of τ corresponding to the maximum value of the cross-correlation function obtained through the kth measurement by sampling rate information adopted by the receiver in the kth measurement, the sampling rate information is a sampling rate in header information of the ith original audio codebook, Delayi is an average audio transmission delay of the ith original audio codebook, and m is an integer greater than or equal to 1, and
• wherein Avg_Delay is an average audio transmission delay of n original audio codebooks and n is an integer greater than or equal to 1.