lhdc headphone testing method and system

Abstract

The invention provides an LHDC earphone testing method and system. The method includes setting the maximum length of an audio data frame; performing LHDC encoding on a wav format audio file to generate an LHDC encoded file, wherein the LHDC encoded file includes a plurality of audio data frames; rearranging the LHDC encoded file to obtain LHDC original data; LHDC raw data is dynamically packaged to obtain multiple AVDTP audio media packets that comply with the AVDTP protocol; according to the audio time of each AVDTP audio media packet, the total audio time of the AVDTP audio media packets that have been sent, and the current AVDTP audio media packet. Send the time node, calculate the sending time node of the next AVDTP audio media packet; read the next AVDTP audio media packet, and send it to the Bluetooth test control board when the sending time node of the next AVDTP audio media packet comes; and send the time node to carry out Dynamic compensation; the AVDTP protocol stack sends the audio media data to the headset for playback, and the audio collector records the sound played by the headset and sends it to the client software for audio analysis.

Description

technical field [0001] The invention relates to an earphone testing method, in particular to an LHDC earphone testing method and system. Background technique [0002] LHDC (Low-Latency High-Definition audio Codec, low-latency high-definition audio codec), as a low-latency high-quality audio coding technology, its data transmission can reach up to 900kbps, which is close to the conventional audio codec SBC (sub band code) (328kbps) 3 times. Its audio delay of 80ms is only one-fifth of SBC (400ms). [0003] At present, there are more and more headphone brands supporting LHDC in the market, but so far there is no perfect LHDC headphone performance and sound quality test, and the traditional headphone test methods are mostly used to test SBC codec headphones, for LHDC codec Headphones are not suitable. For headphones, the SBC encoding can only reach 48KHZ at most, and the test can only measure the frequency response below 24KHZ. LHDC can currently transmit 96KHZ sampling fre...

AI Technical Summary

Problems solved by technology

[0004] Due to the relatively new LHDC encoding technology, the LHDC headphone test solution is not perfect, mainly because the PC (computer) does not support this audio protocol, and LHDC has high requirements for the timing of data downlink, and the real-time performance of the PC side cannot keep up. Communication requirements, so most of them use mobile phones or embedded devices to connect to LHDC earphones and play specified audio for testing. This test method is limited by mobile phones (not all brands support LHDC, and a mobile phone can only connect to one earphone). Its testing technology is difficult, the threshold for employees is high, the efficiency is low, the cost is high, and it takes a long time

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